Home 1998 Summary
1997 spacecrafts 1999 spacecrafts
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The 174 spacecrafts launched in 1998 :
1) Lunar Prospector 2) Skynet 4D 3) 'Ofeq 4 / EROS A 4) STS-89
5) Soyuz TM-27 6) Capricorn (USA 137) 7) Brasilsat B3 8) Inmarsat III F5
9) GFO / Geosat 10) Orbcomm G1 11) Orbcomm G2 12) Celestis 02
13) Globalstar FM-1 / U-1 14) Globalstar FM-2 / U-2 15) Globalstar FM-3 / L-1 16) Globalstar FM-4 / L-4
17) Kosmos 2349 / Yantar-1KFT s/n 1 18) Iridium 52 19) Iridium 56 20) Iridium 54
21) Iridium 50 22) Iridium 53 23) Comets / Kakehashi 24) SNOE
25) Teledesic 1 / T1 / BATSAT 26) Hot Bird 4 27) Intelsat 806 28) Progress M-38
29) UFO F8 (USA 138) 30) SPOT 4 31) Iridium 51 32) Iridium 61
33) Iridium 55 34) Iridium 57 35) Iridium 58 36) Iridium 59
37) Iridium 60 38) TRACE 39) Iridium 62 40) Iridium 63
41) Iridium 64 42) Iridium 65 43) Iridium 66 44) Iridium 67
45) Iridium 68 46) STS-90 47) Globalstar FM-6 48) Globalstar FM-8
49) Globalstar FM-14 50) Globalstar FM-15 51) Nilesat 101 52) BSTAR 1b
53) Kosmos 2350 / Potok / Prognoz 54) Iridium 69 55) Iridium 71 56) Kosmos 2351 / Oko
57) Echostar 4 58) Advanced ORION 2 (USA 139) 59) NOAA 15 60) Progress M-39
61) Iridium 70 62) Iridium 72 63) Iridium 73 64) Iridium 74
65) Iridium 75 66) Zhongwei 1 / Chinastar 1 67) STS-91 68) Thor 3
69) Kosmos 2352 / Strela-3 70) Kosmos 2353 / Strela-3 71) Kosmos 2354 / Strela-3 72) Kosmos 2355 / Strela-3
73) Kosmos 2356 / Strela-3 74) Kosmos 2357 / Strela-3 75) Intelsat 805 76) Kosmos 2358 / Yantar-4K1
77) Kosmos 2359 / Yantar-4KS1 78) Molniya 3-49 79) Planet B / Nozomi 80) Tubsat N
81) Tubsat N1 82) Resurs-O1 No. 4 83) Fasat-Bravo 84) Thai-Microsatellite-OSCAR 31 / TMSAT-1) (TO-31)
85) Gurwin Techsat 1B (GO-32) 86) WESTPACT (WPLTN-1) 87) SAFIR-2 88) Sinosat
89) Kosmos 2360 / Tselina-2 22 90) Orbcomm B5 91) Orbcomm B6 92) Orbcomm B7
93) Orbcomm B8 94) Orbcomm B4 95) Orbcomm B3 96) Orbcomm B2
97) Orbcomm B1 98) Mercury 3 99) Soyuz TM-28 100) Iridium 3
101) Iridium 76 102) ST 1 / Singapore- Taiwan 1 103) Galaxy X 104) Astra 2A
105) Kwangmyongsong 1 106) Iridium 82 107) Iridium 81 108) Iridium 80
109) Iridium 79 110) Iridium 77 111) Globalstar FM-5 112) Globalstar FM-7
113) Globalstar FM-9 114) Globalstar FM-10 115) Globalstar FM-11 116) Globalstar FM-12
117) Globalstar FM-13 118) Globalstar FM-16 119) Globalstar FM-17 120) Globalstar FM-18
121) Globalstar FM-20 122) Globalstar FM-21 123) PAS 7 124) Orbcomm C1
125) Orbcomm C2 126) Orbcomm C3 127) Orbcomm C4 128) Orbcomm C5
129) Orbcomm C6 130) Orbcomm C7 131) Orbcomm C8 132) Molniya 1-91
133) STEX (USA 140) 134) ATEX (USA 141) 135) Eutelsat W2 136) Sirius 3
137) Hot Bird 5 / Eutelsat HB5 138) UFO F9  139) Maqsat 3 140) ARD
141) SCD-2 142) DS 1 / Deep Space 1 143) SEDSAT 144) Progress M-40
145) Afristar 146) GE-5 147) STS-95 148) PANSAT (PO-34)
149) Spartan 201-5 150) PAS 8 151) Iridium 2 152) Iridium 86
153) Iridium 85 154) Iridium 84 155) Iridium 83 156) Sputnik 41 / RS-18
157) Zarya / ISS-1A/R 158) BONUM 1 159) STS-88 / ISS-2A 160) Unity
161) Satmex 5 162) SWAS 163) Nadezhda 164) Astrid 2
165) MCO / Mars Climate Orbiter 166) SAC A 167) Mightysat 168) Iridium 11A
169) Iridium 20A 170) PAS 6B 171) Kosmos 2361 / Parus 172) Kosmos 2362 / Glonass (Uragan) 86L
173) Kosmos 2363 / Glonass / (Uragan) 84L 174) Kosmos 2364 / Glonass (Uragan) 79L
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Spacecraft Entries
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Lunar Prospector
Spacecraft: 
Chronologies: 1998 payload #1 ; 1998-001A ; 5492nd spacecraft.
Type: Lunar probe
Families: Discovery-3 mission ;
Sponsor: NASA
Launch: 7 January 1998 at 2h28 UTC, from Cape Canaveral's SLC-46, by an Athena-2 (LM-004).
Orbit:
Decayed: Crash on the Moon on 31 July 1999 at 9h52 UTC
Mission: Lunar Prospector is an American planetology spacecraft that reached the Lunar vicinity after 105 hours of cruising to orbit the Moon at a nominal altitude of about 100 km from the surface with a period of 118 minutes. The altitude may be maneuvered to be as low as 9 km. The 65-kg spacecraft carries a gamma ray spectrometer, a magnetometer, an electron reflectometer, a neutron spectrometer and an alpha particle spectrometer to probe the surface composition of the Moon for about a year. Of particular interest to NASA is whether there is any ice under the polar caps; the neutron spectrometer will help to determine this.
Lunar Prospector impacted the lunar surface on 31 July 1999; impact site was 42.1° East and 87.7° South near the lunar south pole.
Source: Jonathan Space Report No. 405 ; Spacewarn No. 531 & 549 ; National Space Science Data Center's 1998-001A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ; Space Review's Lunar Prospector: Against All Odds ; 

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Skynet 4D
Spacecraft: 
Chronologies: 1998 payload #2 ; 1998-002A ; 5493rd spacecraft.
Type: Communications
Sponsor: United Kingdom's Ministry of Defense
Launch: 10 January 1998 at 0h32 UTC, from Cape Canaveral's LC-17B, by a Delta 7925 (252).
Orbit: Geostationary over Western Europe
Mission: SkynetT 4D is a 1,150-kg British military communications spacecraft that  is the first in the new series that is expected to replace the aging 1988-era series.
Source: Jonathan Space Report No.  ; Spacewarn No. 531 ; National Space Science Data Center's 1998-002A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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'Ofeq 4 / EROS A
Spacecraft: 
Chronologies: 1998 payload #3 ; 1998 1st loss ; 5494th spacecraft.
Type: Reconnaissance
Sponsor: Israel
Launch: 22 January 1998 at 12h56 UTC, from Palmachim's PALB, by a Shaviyt 1 (4).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; National Space Science Data Center's  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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STS-89
Spacecraft:  Space Shuttle #89 ; Endeavour (12th flight)
Chronologies: 1998 payload #4 ; 1998-003A ; 5495th spacecraft.
Type: Piloted spacecraft
Sponsor: NASA
Launch: 23 January 1998 at 2h48 UTC, from Cape Canaveral's LC-39A, by the Space Shuttle.
Orbit: 379 km x 385 km x 51.7° x 92.2 min
Decayed: 31 January 1998 at 22h38 UTC at the Kennedy Space Center 
Mission: STS-89 delivers to the Mir space complex a new American astronaut for endurance and experience in Mir and to bring back an earlier American astronaut after his four months of stay. It also carried 1,500 kg of supplies. It also carried resources for some microgravity experiments with names like Closed Equilibrated Biological Aquatic System (CEBAS), Microgravity Plant Nutrient Experiment (MPNE), and Interferometer Protein Crystal Growth (IPCG). Endeavour docked on Mir on 24 January at 20h14 UTC and undocked on 29 January at 16h56 and returned to Cape Canaveral.
Source: Jonathan Space Report No.  ; Spacewarn No. 531 ; National Space Science Data Center's 1998-003A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Soyuz TM-27
Spacecraft:  Soyuz 7K-STM No. 76
Chronologies: 1998 payload #5 ; 1998-004A ; 5496th spacecraft.
Type: Piloted spacecraft
Sponsor: Russia (Korolev's Design Bureau)
Launch: 29 January 1998 at 16h33 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511U).
Orbit: Circular at ~350 km x 51.7°
Decayed:
Mission: Soyuz TM-27 is a 7,000-kg Russian transportation spacecraft that carries three cosmonauts and food supplies to the Mir.
Source: Jonathan Space Report No.  ; SpacewarnNo. 531 ; National Space Science Data Center's 1998-004A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Capricorn (USA 137)
Spacecraft: 
Chronologies: 1998 payload #6 ; 1998-005A ; 5497th spacecraft.
Type: Communications
Sponsor: U.S. National Reconnaissance Office
Launch: 29 January 1998 at 18h37 UTC, from Cape Canaveral's SLC-36A, by an Atlas IIA (AC-109).
Orbit: 320 km x 38,400 km
Decayed:
Mission: Capricorn is an American military photo/radar imaging spacecraft. It is built, owned and operated by the National Reconnoissance Office (NRO). It is likely that the initial apogee of about 38,400 km will be at a high northern latitude, and the perigee of 320 km will be over the Antarctica.
Source: Jonathan Space Report No.  ; Spacewarn No. 531 ; National Space Science Data Center's 1998-005A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Brasilsat B3
Spacecraft: 
Chronologies: 1998 payload #7 ; 1998-006A ; 5498th spacecraft.
Type: Communications (multi-service)
Sponsor: Brazil's EMBRATEL
Launch: 4 February 1998 at 23h29 UTC, from Kourou Space Center's ELA-2, by an Ariane 44LP (V105).
Orbit: Geostationary at 70° West longitude
Mission: Brasilsat B3 is a Brazilian communications spacecraft that carries 28 C-band transponders to provide voice and video communications to Brazil and other countries.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-006A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Inmarsat III F5
Spacecraft: 
Chronologies: 1998 payload #8 ; 1998-006B ; 5499th spacecraft.
Type: Communications (multi-service)
Sponsor: International Maritime Communications Satellite Organization
Launch: 4 February 1998 at 23h29 UTC, from Kourou Space Center's ELA-2, by an Ariane 44LP (V105).
Orbit: Geostationary over Atlantic
Mission: Inmarsat 3F5 is a communications spacecraft of that international consortium that enables communications among maritime vehicles in the Atlantic and its shores.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-006B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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GFO / Geosat
Spacecraft:  Geosat Follow-On
Chronologies: 1998 payload #9 ; 1998-007A ; 5500th spacecraft.
Type: Ocean observations
Sponsor: US Navy Space and Naval Systems Warfare Command
Launch: 10 February 1998 at 13h20 UTC, from Vandenberg Air Force Base's LC-576E, by a Taurus (T2).
Orbit: 775 km x 878 km x 108.0° x 101.4 min
Decayed:
Mission: GFO is a 410-kg American military spacecraft that carries a radio altimeter and a water vapor radiometer to measure sea levels and glacial heights.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-007A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm G1 
Spacecraft:  Orbcomm FM3
Chronologies: 1998 payload #10 ; 1998-007B ; 5501st spacecraft.
Type: Communications (phone)
Sponsor: U. S. Orbcomm Inc.
Launch: 10 February 1998 at 13h20 UTC, from Vandenberg Air Force Base's LC-576E, by a Taurus (T2).
Orbit: 784 km x 878 km x 108.0° x 101.5 min
Decayed:
Mission: 3rd group (of two) Obrcomms spacecrafts that are American low-altitude communications spacecraft. These ORBCOMM FM fleet of satellites enable global voice and data links to/from fixed or mobile industrial sites such as oil rigs, cargo trucks and ships.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-007B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm G2 
Spacecraft:  Orbcomm FM4
Chronologies: 1998 payload #11 ; 1998-007C ; 5502nd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 10 February 1998 at 13h20 UTC, from Vandenberg Air Force Base's LC-576E, by a Taurus (T2).
Orbit: 784 km x 878 km x 108.0° x 101.5 min
Decayed:
Mission: 3rd group (of two) Obrcomms spacecrafts
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-007C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Celestis 02
Spacecraft: 
Chronologies: 1998 payload #12 ; 1998-007D ; 5503rd spacecraft.
Type: Space burials
Sponsor: Celestis Inc.
Launch: 10 February 1998 at 13h20 UTC, from Vandenberg Air Force Base's LC-576E, by a Taurus (T2).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; National Space Science Data Center's 1998-007D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-1 / U-1
Spacecraft: 
Chronologies: 1998 payload #13 ; 1998-008A ; 5504th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 14 February 1998 at 14h34 UTC, from Cape Canaveral's LC-17A, by a Delta 7925 (Delta 7420-10C 253).
Orbit: 1,245 km x 1,258 km x 52.0° x 110.5 min
Decayed:
Mission: First group of four Globalstars spacecrafts.that are communications spacecraft that enable remote or mobile telephones to reach out to anywhere in the world. 
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-008A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-2 / U-2
Spacecraft: 
Chronologies: 1998 payload #14 ; 1998-008B ; 5505th spacecraft.
Type: Communications (phone0
Sponsor: U.S. Space Systems/Loral
Launch: 14 February 1998 at 14h34 UTC, from Cape Canaveral's LC-17A, by a Delta 7925 (Delta 7420-10C 253).
Orbit: 1,245 km x 1,258 km x 52.0° x 110.5 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-008B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-3 / L-1 
Spacecraft: 
Chronologies: 1998 payload #15 ; 1998-008C ; 5506th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 14 February 1998 at 14h34 UTC, from Cape Canaveral's LC-17A, by a Delta 7925 (Delta 7420-10C 253).
Orbit: 1,245 km x 1,258 km x 52.0° x 110.5 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-008C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-4 / L-2
Spacecraft: 
Chronologies: 1998 payload #16 ; 1998-008D ; 5507th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 14 February 1998 at 14h34 UTC, from Cape Canaveral's LC-17A, by a Delta 7925 (Delta 7420-10C 253).
Orbit: 1,245 km x 1,258 km x 52.0° x 110.5 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-008D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2349 
Spacecraft:  Yantar-1KFT s/n 1 / Kometa No. 19 / Spin-2 2
Chronologies: 1998 payload #17 ; 1998-009A ; 5508th spacecraft.
Type: Reconnaissance / topography
Sponsor: Russia's Defense ministry
Launch: 17 February 1998 at 10h30 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/Soyuz (11A511U).
Orbit: 204 km x 293 kmx 70.6° x 89.2 min
Decayed: 2 April 1998
Mission: Kosmos 2349 is a Russian military photographic (2-meter resolution) spacecraft that provides topographic map of the USA in accordance with a Russian-American contract.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 & 534 ; National Space Science Data Center's 1998-009A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 52
Spacecraft:  Iridium SV052
Chronologies: 1998 payload #18 ; 1998-010A ; 5509th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 18 February 1998 at 13h58 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 254).
Orbit: 625 km x 643 km x 86.5° x 97.4 min
Decayed:
Mission: Eleventh group (of five) Iridiums that are American low-altitude communications spacecraft. These five join the constellation of previously launched 46 Iridiums which enable mobile phones to reach out beyond the area of cellular networks.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-010A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 56
Spacecraft:  Iridium SV056
Chronologies: 1998 payload #19 ; 1998-010B ; 5510th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 18 February 1998 at 13h58 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 254).
Orbit: 625 km x 643 km x 86.5° x 97.4 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-010B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 54
Spacecraft:  Iridium SV054
Chronologies: 1998 payload #20 ; 1998-010C ; 5511th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 18 February 1998 at 13h58 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 254).
Orbit: 625 km x 643 km x 86.5° x 97.4 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 532; National Space Science Data Center's 1998-010C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 50
Spacecraft:  Iridium SV050
Chronologies: 1998 payload #21 ; 1998-010D ; 5512th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 18 February 1998 at 13h58 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 254).
Orbit: 625 km x 643 km x 86.5° x 97.4 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-010D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 53
Spacecraft:  Iridium SV053
Chronologies: 1998 payload #22 ; 1998-010E ; 5513th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 18 February 1998 at 13h58 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 254).
Orbit: 625 km x 643 km x 86.5° x 97.4 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-010E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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COMETS / Kakehashi 
Spacecraft:  COMmunuications and Broadcasting Experimental Test Satellite
Chronologies: 1998 payload #23 ; 1998-011A ; 5514th spacecraft.
Type: Technology
Sponsor: Japan's NASDA
Launch: 21 February 1998 at 7h55 UTC, from Tanegashima Space Center's Y, by a H-2 (H-II-5F).
Orbit: Initial: 249 km x 1,882 km x 30.0° x 106.5 min
Decayed:
Mission: COMETS is a Japanese test spacecraft, but malfunction in the second stage resulted in an orbit well short of geostationary. It was designed to be a relaying satellite between ground stations and orbiting satellites.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-011A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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SNOE
Spacecraft:  Student Nitric Oxide Explorer
Chronologies: 1998 payload #24 ; 1998-012A ; 5515th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: NASA
Launch: 26 February 1998 at 7h07 UTC, from Vandenberg Air Force Base's RW-30, by a Pegasus XL (F20).
Orbit: 535 km x 580 km x 97.7° x 95.8 min
Decayed: 13 December 2003
Mission: SNOE is an American research spacecraft that carries instruments to monitor the stratospheric ozone, auroral UV and solar x-rays. The 125-kg mini-satellite was built by the faculty and students of the University of Colorado, Boulder, 
Source: Jonathan Space Report No.  ; Spacewarn No. 532 & 602 ; National Space Science Data Center's 1998-012A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Teledesic 1 (T1) / BATSAT
Spacecraft:  Broadband Advanced Technology SATellite
Chronologies: 1998 payload #25 ; 1998-012B ; 5516th spacecraft.
Type: Technology
Sponsor: Teledesic
Launch: 26 February 1998 at 7h07 UTC, from Vandenberg Air Force Base's RW-30, by a Pegasus XL (F20).
Orbit: 535 km x 580 kmx 97.7° x 95.8 min
Decayed:
Mission: BATSAT is an American communications satellite that may be the first spacecraft to carry a Ka-band transponder in low Earth orbit. The 120-kg test satellite was later renamed as T1 (shorter version for Teledesic 1). The Teledesic constellation known as "Internet-in-the-sky" may consist of 288 mini-satellites in low Earth orbit.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-012B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ; Spacewarn No. 564;
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Hot Bird 4
Spacecraft: 
Chronologies: 1998 payload #26 ; 1998-013A ; 5517th spacecraft.
Type: Communications
Sponsor: European Telecommunications Satellite Organization
Launch: 27 February 1998 at 22h38 UTC, from Kourou Space Center's ELA-2, by an Ariane 42P (V106).
Orbit: Geostationary at 13° East longitude
Mission: HOT BIRD 4 is a communications spacecraft that enables voice and video communications to the European nations. The 2,885-kg spacecraft.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-013A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Intelsat 806
Spacecraft:  NSS 806
Chronologies: 1998 payload #27 ; 1998-014A ; 5518th spacecraft.
Type: Communications
Sponsor: Intelsat
Launch: 28 February 1998 at 0h21 UTC, from Cape Canaveral's SLC-36B, by an Atlas IIAS (AC-151).
Orbit: Geostationary at 40° West longitude
Mission: Intelsat 806 is a communications spacecraft of that 142-nation consortium. It was parked over the Atlantic ocean enabling voice and vedeo communications to Europe and the American countries by means of its 28 C-band and six Ku-band transponders. The 4,000-kg spacecraft is the latest member of the current INTELSAT fleet, now totalling 26 spacecraft.
Source: Jonathan Space Report No.  ; Spacewarn No. 532 ; National Space Science Data Center's 1998-014A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Progress M-38
Spacecraft:  Progress 7K-TGM No 240
Chronologies: 1998 payload #28 ; 1998-015A ; 5519th spacecraft.
Type: Cargo delivery to Mir
Sponsor: Russia (Korolev's Design Bureau)
Launch: 14 March 1998 at 22h46 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511U).
Orbit: Circulat at ~350 km x 51.7°
Decayed:
Mission: Progress M-38 is a Russian automatic cargo ship that carried a 900-kg propulsion unit to be attached to the Quantum module of Mir and 1,500 kg of repair tools, replacement parts, food and water. It had to be docked manually with Mir after a slight misalignment was noticed when it was about 15 meters from Mir. The cargoship was docked on 17 March 1998 at 0h31 UTC.
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-015A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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UFO F8 (USA 138)
Spacecraft:  UHF F/O F8
Chronologies: 1998 payload #29 ; 1998-016A ; 5520th spacecraft.
Type: Communications
Sponsor: U.S. Navy
Launch: 16 March 1998 at 21h32 UTC, from Cape Canaveral's SLC-36A, by an Atlas II (AC-132).
Orbit: Geostationary
Mission: UHF F/O F8 (also known as UFO 8) is an American military communications spacecraft that is the eighth member of the UFO series. With a mass of 1,000 kg and an electrical power of 1.2 kW, the spacecraft carries 23 UHF channels to provide secure communications around the globe.
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-016A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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SPOT 4
Spacecraft: 
Chronologies: 1998 payload #30 ; 1998-017A ; 5521st spacecraft.
Type: Earth remote sensing
Sponsor: France's CNES
Launch: 24 March 1998 at 1h46 UTC, from Kourou Space Center's ELA-2, by an Ariane 40 (V107).
Orbit: 791 km x 811 km x 98.8° x 100.9 min
Decayed:
Mission: SPOT 4 is a French remote sensing/reconnoissance spacecraft that carries multispectral cameras to monitor vegetation at 1 km resolution and other cameras to provide 10 to 20 meter resolution pictures. Also on board is a DORIS package to ascertain the spacecraft coordinates and a "SILEX" instrument to enable laser transmission of the data to a yet-to-be launched Artemis satellite.
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-017A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 51
Spacecraft:  Iridium SV051
Chronologies: 1998 payload #31 ; 1998-018A ; 5522nd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 25 March 1998 at 17h01 UTC, from Taiyuan's LC-1, by a Chang Zheng 2C-III/SD (CZ2C-17).
Orbit: 626 km x 628 km x 86° x 97 min
Decayed:
Mission: Twelth group (of two) Iridiums that are the latest to join the Iridium fleet of American spacecraft. These satellites enable global relay of communications between telephones located far away from local cellular areas.
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-018A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 61
Spacecraft:  Iridium SV061
Chronologies: 1998 payload #32 ; 1998-018B ; 5523rd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 25 March 1998 at 17h01 UTC, from Taiyuan's LC-1, by a Chang Zheng 2C-III/SD (CZ2C-17).
Orbit:
Decayed:
Mission: 626 km x 628 km x 86° x 97 min
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-018B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 55
Spacecraft:  Iridium SV055
Chronologies: 1998 payload #33 ; 1998-019A ; 5524th spacecraft.
Type: Communications (photo)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 30 March 1998 at 6h02 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 255).
Orbit: 620 km x 635 km x 86° x 97 min
Decayed:
Mission: Thirtienth group (of seven) Iridiums that are the latest spacecraft to join the American fleet of Iridiums. The fleet enables global relay of communications between telephones located far away from local cellular areas.
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-019A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 57
Spacecraft:  Iridium SV057
Chronologies: 1998 payload #34 ; 1998-019B ; 5525th spacecraft.
Type: Communications (photo)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 30 March 1998 at 6h02 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 255).
Orbit: 620 km x 635 km x 86° x 97 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-019B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 58
Spacecraft:  Iridium SV058
Chronologies: 1998 payload #35 ; 1998-019C ; 5526th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 30 March 1998 at 6h02 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 255).
Orbit: 620 km x 635 km x 86° x 97 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-019C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 59
Spacecraft:  Iridium SV059
Chronologies: 1998 payload #36 ; 1998-019D ; 5527th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 30 March 1998 at 6h02 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 255).
Orbit: 620 km x 635 km x 86° x 97 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-019D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 60
Spacecraft:  Iridium SV060
Chronologies: 1998 payload #37 ; 1998-019E ; 5528th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 30 March 1998 at 6h02 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 255).
Orbit: 620 km x 635 km x 86° x 97 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 533 ; National Space Science Data Center's 1998-019E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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TRACE
Spacecraft: Transition Region and Coronal Explorer
Chronologies: 1998 payload #38 ; 1998-020A ; 5529th spacecraft.
Type: Sun studies
Sponsor: NASA
Launch: 2 April 1998 at 2h42 UTC, from Vandenberg Air Force Base's RW-30/12, by a Pegasus XL (F21).
Orbit: 597 km x 644 km x 97.8° x 97.1 min
Decayed:
Mission: TRACE is an American solar physics spacecraft that carries a triaxial magnetometer for housekeeping and an EUV telescope of 8.66 meters focal length with cryogenic detectors covering many wavelengths to study the solar chromosphere and lower corona at 1-sec arc resolution. That resolution is sufficient to monitor the plasma entrapped by the thin bundles of twisted magnetic ropes that are presumed to dominate the transition region and contribute to coronal heating. The 250-kg, 200-W spacecraft 
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-020A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 62
Spacecraft:  Iridium SV062
Chronologies: 1998 payload #39 ; 1998-021A ; 5530th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 7 April 1998 at 2h13 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/17S40 (8K82K 391-02 / DM2).
Orbit: 507 km x 537 km x 86.7° x 98 min
Decayed:
Mission: Fortieth group (of seven) Iridiums that are the latest to join the American fleet that will enable global relay of communications between telephones located far away from local cellular areas. (The next launch will complete the goal of 66 active and six spare spacecraft.)
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-021A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 63
Spacecraft: Iridium SV063
Chronologies: 1998 payload #40 ; 1998-021B ; 5531st spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 7 April 1998 at 2h13 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/17S40 (8K82K 391-02 / DM2).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-021B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 64
Spacecraft:  Iridium SV064
Chronologies: 1998 payload #41 ; 1998-021C ; 5532nd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 7 April 1998 at 2h13 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/17S40 (8K82K 391-02 / DM2).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-021C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 65
Spacecraft:  Iridium SV065
Chronologies: 1998 payload #42 ; 1998-021D ; 5533rd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 7 April 1998 at 2h13 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/17S40 (8K82K 391-02 / DM2).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-021D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 66
Spacecraft:  Iridium SV066
Chronologies: 1998 payload #43 ; 1998-021E ; 5534th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 7 April 1998 at 2h13 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/17S40 (8K82K 391-02 / DM2).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-021E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 67
Spacecraft:  Iridium SV067
Chronologies: 1998 payload #44 ; 1998-021F ; 5535th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 7 April 1998 at 2h13 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/17S40 (8K82K 391-02 / DM2).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-021F ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 68
Spacecraft:  Iridium SV068
Chronologies: 1998 payload #45 ; 1998-021G ; 5536th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 7 April 1998 at 2h13 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/17S40 (8K82K 391-02 / DM2).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-021G ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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STS-90
Spacecraft:  Space Shuttle #90 ; Columbia (25th flight)
Chronologies: 1998 payload #46 ; 1998-022A ; 5537th spacecraft.
Type: Piloted spacecraft
Sponsor: NASA
Launch: 17 April 1998 at 18h19 UTC, from Cape Canaveral's LC-39B, by the Space Shuttle.
Orbit: 257 km x 286 km x 39° x 89.9 min
Decayed:
Mission: STS-90 primary mission was to conduct a comprehensive list of neurobiological experiments and observations on a number of species: seven humans, 18 pregnant mice, 152 rats (including 12 females with prenatal litters of eight each, and two with litters of seven each), 229 swordtail fish, 60 snails, 75 snail pawn packs, 824 crickets and 680 cricket eggs. According to a Principal Investigator (of rat research), "the findings from the microgravity experiments may help gain some more insight into the best way to treat neurologic patients with Parkinson's disease, and balance disorders." According to the project scientist of the mission, "it is important to note that the sensory and motor development events and processes under study in the various species on Neurolab are essentially the same as those that occur in humans, although with a different time frame."
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-022A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-6
Spacecraft: 
Chronologies: 1998 payload #47 ; 1998-023A ; 5538th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral 
Launch: 24 April 1998 at 22h38 UTC, from Cape Canaveral's LC-17A, by a Delta 7925 (Delta 7420-10C 256).
Orbit: 1,236 km x 1,253 km x 52.0° x 111 min 
Decayed:
Mission: Second group of four Globalstars spacecrafts which are low-altitude communications satellites of that international consortium. The eventual fleet of 48 satellites (plus eight spares) will enable telephone and FAX communictions from/to areas far away from ground-based cellular networks. Future launches will use Ukrainian and Russian rockets.
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-023A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-8
Spacecraft: 
Chronologies: 1998 payload #48 ; 1998-023B ; 5539th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral 
Launch: 24 April 1998 at 22h38 UTC, from Cape Canaveral's LC-17A, by a Delta 7925 (Delta 7420-10C 256).
Orbit: 1,236 km x 1,253 km x 52.0° x 111 min 
Decayed:
Mission: Second group of four Globalstars spacecrafts.
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-023B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-14
Spacecraft: 
Chronologies: 1998 payload #49 ; 1998-023C ; 5540th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral 
Launch: 24 April 1998 at 22h38 UTC, from Cape Canaveral's LC-17A, by a Delta 7925 (Delta 7420-10C 256).
Orbit: 1,236 km x 1,253 km x 52.0° x 111 min
Decayed:
Mission: Second group of four Globalstars spacecrafts.
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-023C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-15
Spacecraft: 
Chronologies: 1998 payload #50 ; 1998-023D ; 5541st spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral 
Launch: 24 April 1998 at 22h38 UTC, from Cape Canaveral's LC-17A, by a Delta 7925 (Delta 7420-10C 256).
Orbit: 1,236 km x 1,253 km x 52.0° x 111 min 
Decayed:
Mission: Second group of four Globalstars spacecrafts.
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-023D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Nilesat 101
Spacecraft: 
Chronologies: 1998 payload #51 ; 1998-024A ; 5542nd spacecraft.
Type: Communications (DBS)
Sponsor: Egypt
Launch: 28 April 1998 at 22h53 UTC, from Kourou Space Center's ELA-2, by an Ariane 44P (V108).
Orbit: Geostationary at 47° East longitude
Mission: NILESAT 101 is an Egyptian communications spacecraft that provides Ku-band direct-to-home television at 84 channels and radio and data broadcasting at 400 channels throughout the Middle East, Mediterranean region and North Africa. The 1,800 kg spacecraft
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-024A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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BSTAR 1b
Spacecraft: 
Chronologies: 1998 payload #52 ; 1998-024B ; 5543rd spacecraft.
Type: Communications (DBS)
Sponsor:
Launch: 28 April 1998 at 22h53 UTC, from Kourou Space Center's ELA-2, by an Ariane 44P (V108).
Orbit: Geostationary 
Mission: BSAT 1-B is a Japanese communications spacecraft that enables direct-to-home voice and video communications to Japan and its vicinity. The 1,200 kg spacecraft
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-024B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2350
Spacecraft:  Potok / Prognoz
Chronologies: 1998 payload #53 ; 1998-025A ; 5544th spacecraft.
Type: Communications
Sponsor: Russia's Defense ministry
Launch: 29 April 1998 at 4h37 UTC, from Baykonur Cosmodrome's LC-200/39, by a D-1-e/Proton-K/DM-2 (8K82K / 11S861 384-02).
Orbit: Geostationary
Mission: Cosmos 2350 is a Russian military spacecraft
Source: Jonathan Space Report No.  ; Spacewarn No. 534 ; National Space Science Data Center's 1998-025A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 69
Spacecraft:  Iridium SV069
Chronologies: 1998 payload #54 ; 1998-026A ; 5545th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 2 May 1998 at 9h16 UTC, from Taiyuan Space Launch Center's LC-1, by a Chang Zheng 2C-III/SD (CZ2C-18).
Orbit: 665 km x 670 km x 86.6° x 98.1 min
Decayed:
Mission: Fifteenth group (of two) Iridiums that joins the previously launched fleet of Iridiums that enable voice and data transmission from locations far away from cellular networks.
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-026A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 71
Spacecraft:  Iridium SV071
Chronologies: 1998 payload #55 ; 1998-026B ; 5546th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 2 May 1998 at 9h16 UTC, from Taiyuan Space Launch Center's LC-1, by a Chang Zheng 2C-III/SD (CZ2C-18).
Orbit: 665 km x 670 km x 86.6° x 98.1 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-026B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2351
Spacecraft:  Oko
Chronologies: 1998 payload #56 ; 1998-027A ; 5547th spacecraft.
Type: Missile early warning
Sponsor: Russian Defense ministry
Launch: 7 May 1998 at 8h53 UTC, from Plesetsk Cosmodrome's LC-16/2, by an A-2-e/"Molniya" (8K78M / 2BL).
Orbit: 533 km x 39.823 km x 63° x 717.8 min
Decayed:
Mission: Kosmos 2351 is a Russian military satellite.
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-027A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Echostar 4
Spacecraft: 
Chronologies: 1998 payload #57 ; 1998-028A ; 5548th spacecraft.
Type: Communications (DBS)
Sponsor: EchoStar
Launch: 7 May 1998 at 23h45 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/DM-2M (8K82K 393-02 / DM3).
Orbit: Geostationary 
Mission: EchoStar 4 is an American spacecraft that provides direct-to-home voice and video communications to the North American continent with its 32 transponders.
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-028A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Advanced ORION 2 (USA 139)
Spacecraft:  Orion follow-on
Chronologies: 1998 payload #58 ; 1998-029A ; 5549th spacecraft.
Type: Missile early warning
Sponsor: U.S. National Reconnoissance Office
Launch: 9 May 1998 at 1h38 UTC, from Cape Canaveral's LC-40, by a Titan 4B (Titan 401B 4B-25 K-25, Centaur TC-18).
Orbit:
Decayed:
Mission: This is an American military reconnoissance spacecraft.
Source: Jonathan Space Report No. 425 ; Spacewarn No. 535 ; National Space Science Data Center's 1998-029A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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NOAA 15
Spacecraft:  NOAA K
Chronologies: 1998 payload #59 ; 1998-030A ; 5550th spacecraft.
Type: Meteorology
Sponsor: NOAA
Launch: 13 May 1998 at 15h52 UTC, from Vandenberg Air Force Base's SLC-4W, by a Titan 2 (Titan 23G 12).
Orbit: Initial: 808 km x 824 km x 98.7° x 101.2 min (Sun-synchronous)
Decayed:
Mission: NOAA 15 is an American weather satellite that carries imaging and sounding instruments to obtain data on cloud coverage, atmospheric temperature, humidity and ozone concentration. NOAA 15 replaces the decommissioned NOAA 12.
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-030A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Progress M-39
Spacecraft:  Progress 7K-TGM No 238
Chronologies: 1998 payload #60 ; 1998-031A ; 5551st spacecraft.
Type: Cargo delivery to Mir
Sponsor: Russia (Korolev's Design Bureau)
Launch: 14 May 1998 at 22h12 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511U).
Orbit: 371 km x 378 km x 51.7° x 92 min
Decayed:
Mission: Progress M-39 is a Russian automatic cargo craft that delivers 1,500 kg of fuel and another 1,500 kg of food, equipments and gifts. The cargocraft docks with Mir space station on 17 May 1998 at 23h50 UTC. Progress M-39 was suppose to give a jerk to Mir in late June 1998, to initiate progressively lower orbits, leading to its demise in the ocean in December 1999.
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-031A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 70
Spacecraft: Iridium SV070
Chronologies: 1998 payload #61 ; 1998-032A ; 5552nd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 17 May 1998 at 21h16 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 257).
Orbit: 665 km x 670 km x 86.6° x 98 min
Decayed:
Mission: Sixteenth group (of five) Iridiums that is the latest and the final batch of Iridiums that completes the constellation of 66 operational and six reserve satellites. The full constellation enables telephone calls and data transmissions among fixed/mobile ground stations far removed from cellular areas.
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-032A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 72
Spacecraft: Iridium SV072
Chronologies: 1998 payload #62 ; 1998-032B ; 5553rd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 17 May 1998 at 21h16 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 257).
Orbit: 665 km x 670 km x 86.6° x 98 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-032B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 73
Spacecraft:  Iridium SV073
Chronologies: 1998 payload #63 ; 1998-032C ; 5554th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 17 May 1998 at 21h16 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 257).
Orbit: 665 km x 670 km x 86.6° x 98 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-032C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 74
Spacecraft:  Iridium SV074
Chronologies: 1998 payload #64 ; 1998-032D ; 5555th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 17 May 1998 at 21h16 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 257).
Orbit: 665 km x 670 km x 86.6° x 98 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-032D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 75
Spacecraft:  Iridium SV075
Chronologies: 1998 payload #65 ; 1998-032E ; 5556th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 17 May 1998 at 21h16 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 257).
Orbit: 665 km x 670 km x 86.6° x 98 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-032E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Zhongwei 1 / Chinastar 1
Spacecraft: 
Chronologies: 1998 payload #66 ; 1998-033A ; 5557th spacecraft.
Type: Communications (multi-service)
Sponsor: China Orient Telecommunications Satellite Co. (Chinese telecoms ministry)
Launch: 30 May 1998 at 10h00 UTC, from Xichang's LC-2, by a Chang Zheng 3B (CZ3B-4).
Orbit: Geostationary at 87.5° longitude
Mission: Zhongwei 1 is a PRC communications spacecraft that carries 24 C-band and 24 Ku-band transponders to provide voice and video communications throughout China and neighboring countries. The 2,984 kg spacecraft
Source: Jonathan Space Report No.  ; Spacewarn No. 535 ; National Space Science Data Center's 1998-033A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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STS-91
Spacecraft:  Space Shuttle #91 ; Discovery (24th flight)
Chronologies: 1998 payload #67 ; 1998-034A ; 5558th spacecraft.
Type: Piloted spacecraft
Sponsor: NASA
Launch: 2 June 1998 at 22h06 UTC, from Cape Canaveral's LC-39A, by the Space Shuttle.
Orbit: 326 km x 330 km x 51.7° x 91.1 min
Decayed: 12 June 1998 at 18h00 UTC
Mission: STS-91 main mission was to deliver goods to the Mir space station. It carried also a 3.5 tonne, international Alpha Magnetic Spectrometer to measure very high energy cosmic rays, and some resources for microgravity experiments. Discovery docked with Mir on 4 June 1998 at 20h58 UTC and undocked on 8 June 1998 at 16h02 UT toreturned to Earth at 18:00 UT on 12 June 1998. 
Source: Jonathan Space Report No.  ; Spacewarn No. 536 ; National Space Science Data Center's 1998-034A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Thor 3
Spacecraft: 
Chronologies: 1998 payload #68 ; 1998-035A ; 5559th spacecraft.
Type: Communications (multi-service)
Sponsor: Sweden's Telenor Satellite Services AS
Launch: 10 June 1998 at 0h35 UTC, from Cape Canaveral's LC-17A, by a Delta 7925 (Delta 7925-9.5 258).
Orbit: Geostationary at 1.0° West longitude
Mission: THOR 3 is a Norwegian communications spacecraft that carries 14 Ku-band transponders to provide voice and video communications to Europe.
Source: Jonathan Space Report No.  ; Spacewarn No. 536 ; National Space Science Data Center's 1998-035A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2352
Spacecraft: Strela-3
Chronologies: 1998 payload #69 ; 1998-036A ; 5560th spacecraft.
Type: Communications (store/dump)
Sponsor: Russia's Defense ministry
Launch: 15 June 1998 at 22h58 UTC, from Plesetsk Cosmodrome's LC-32/1, by a F-2/Tsyklon 3.
Orbit: 1,300 km x 1,870 km x 82.6° x 118 min
Decayed:
Mission: These six Kosmos satellites are Russian military communications spacecraft that belong to the Strela-3 series. They are reported to be fully functional even though the orbits deviated from circularity.
Source: Jonathan Space Report No.  ; Spacewarn No. 536 ; National Space Science Data Center's 1998-036A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2353
Spacecraft:  Strela-3
Chronologies: 1998 payload #70 ; 1998-036B ; 5561st spacecraft.
Type: Communications (store/dump)
Sponsor: Russia's Defense ministry
Launch: 15 June 1998 at 22h58 UTC, from Plesetsk Cosmodrome's LC-32/1, by a F-2/Tsyklon 3.
Orbit: 1,300 km x 1,870 km x 82.6° x 118 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 536 ; National Space Science Data Center's 1998-036B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2354
Spacecraft:  Strela-3
Chronologies: 1998 payload #71 ; 1998-036C ; 5562nd spacecraft.
Type: Communications (store/dump)
Sponsor: Russia's Defense ministry
Launch: 15 June 1998 at 22h58 UTC, from Plesetsk Cosmodrome's LC-32/1, by a F-2/Tsyklon 3.
Orbit: 1,300 km x 1,870 km x 82.6° x 118 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 536 ; National Space Science Data Center's 1998-036C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2355
Spacecraft:  Strela-3
Chronologies: 1998 payload #72 ; 1998-036D ; 5563rd spacecraft.
Type: Communications (store/dump)
Sponsor: Russia's Defense ministry
Launch: 15 June 1998 at 22h58 UTC, from Plesetsk Cosmodrome's LC-32/1, by a F-2/Tsyklon 3.
Orbit: 1,300 km x 1,870 km x 82.6° x 118 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 536 ; National Space Science Data Center's 1998-036D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2356
Spacecraft:  Strela-3
Chronologies: 1998 payload #73 ; 1998-036E ; 5564th spacecraft.
Type: Communications (store/dump)
Sponsor: Russia's Defense ministry
Launch: 15 June 1998 at 22h58 UTC, from Plesetsk Cosmodrome's LC-32/1, by a F-2/Tsyklon 3.
Orbit: 1,300 km x 1,870 km x 82.6° x 118 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 536 ; National Space Science Data Center's 1998-036E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2357
Spacecraft:  Strela-3
Chronologies: 1998 payload #74 ; 1998-036F ; 5565th spacecraft.
Type: Communications (store/dump)
Sponsor: Russia's Defense ministry
Launch: 15 June 1998 at 22h58 UTC, from Plesetsk Cosmodrome's LC-32/1, by a F-2/Tsyklon 3.
Orbit: 1,300 km x 1,870 km x 82.6° x 118 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 536 ; National Space Science Data Center's 1998-036F ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Intelsat 805
Spacecraft: 
Chronologies: 1998 payload #75 ; 1998-037A ; 5566th spacecraft.
Type: Communications (multi-service)
Sponsor: Intelsat
Launch: 18 June 1998 at 22h48 UTC, from Cape Canaveral's SLC-36A, by an Atlas IIAS (AC-153).
Orbit: Geostationary at ~40° West longitude.
Decayed:
Mission: Intelsat 805 is the latest member of the INTELSAT fleet of geosynchronous satellites and it provides voice, video, and internet services between Europe and the Americas.
Source: Jonathan Space Report No.  ; Spacewarn No. 536 ; National Space Science Data Center's 1998-037A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2358
Spacecraft:  Yantar-4K1 / Kobal't
Chronologies: 1998 payload #76 ; 1998-038A ; 5567th spacecraft.
Type: Reconnaissance
Sponsor: Russia's Defense ministry
Launch: 24 June 1998 at 18h30 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/Soyuz (11A511U).
Orbit: 167 km x 334 km x 67.1° x 89.5 min
Decayed: 22 October 1998
Mission: Kosmos 2358 is a Russian military reconnaissance spacecraft.
Source: Jonathan Space Report No.  ; Spacewarn No. 536 & 540 ; National Space Science Data Center's 1998-038A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2359
Spacecraft:  Yantar-4KS1 / Neman
Chronologies: 1998 payload #77 ; 1998-039A ; 5568th spacecraft.
Type: Reconnaissance
Sponsor: Russia's Defense ministry
Launch: 25 June 1998 at 14h00 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/Soyuz (11A511U).
Orbit: 192 km x 300 km x 64.9° x 89.2 min
Decayed: 12 July 1999
Mission: Kosmos 2359 is a Russian military reconnaissance spacecraft.
Source: Jonathan Space Report No.  ; Spacewarn No. 536 & 549 ; National Space Science Data Center's 1998-039A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Molniya 3-49
Spacecraft:  Molniya-3 No. 61
Chronologies: 1998 payload #78 ; 1998-040A ; 5569th spacecraft.
Type: Communications
Sponsor: Russia
Launch: 1st July 1998 at 0h48 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2-e/"Molniya" (8K78M / ML).
Orbit: 466 km x 40,770 km x 62.8° x 12 hr 15 min
Decayed:
Mission: Molniya 3-49 is a Russian communications spacecraft with its apogee in the Northern Hemisphere.
Source: Jonathan Space Report No.  ; Spacewarn No. 537 ; National Space Science Data Center's 1998-040A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Planet B / Nozomi
Spacecraft:  Nozomi means "hope".
Chronologies: 1998 payload #79 ; 1998-041A ; 5570th spacecraft.
Type: Mars probe
Sponsor: Japan's ISAS
Launch: 3 July 1998 at 18h12 UTC, from Kagoshima Space Center's M-V, by a M-V (3).
Orbit: Initial: 340 km x 590,000 km x 28.4° (Earth)
Decayed:
Mission: Planet-B is a Japanese Mars orbiter that was firts place in Earth orbit. The 258 kg spacecraft makes two Lunar swingbys on 24 September and 18 December 1998 and an Earth swingby on 20 December 1998, after which it was supposed to enter a highly eccentric Martian orbit on 11 October 1999. The spacecraft is capable of providing data on the solar wind interaction with Mars as well as data on its thermosphere and ionosphere. Nozomi carries 14 instruments, including a magnetometer, UV spectrometers, plasma/wave analyzers, and energetic particles detectors.
     Following its propulsion problems, ISAS' Nozomi probe will remain in solar orbit until December 2003, entering Mars orbit four years late.
     In 14 December 2003, Nozomi flew past Mars at a height of 1000 km. Attempts to operate the spacecraft's main propulsion system failed, and small thrusters were used to increase the flyby distance by about 100 km to ensure a clean miss. The mission has now been abandoned, and Nozomi will enter a new orbit around the Sun.
Source: Jonathan Space Report No. 385 & 516 ; Spacewarn No. 537 ; National Space Science Data Center's 1998-041A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Tubsat N
Spacecraft: 
Chronologies: 1998 payload #80 ; 1998-042A ; 5571st spacecraft.
Type: Communications (data relay)
Sponsor: Germany's Technische Universitat Berlin (TUB)

Source: TUBSAT
Launch: 7 July 1998, from a Sub K407 in Barents Sea, by a Shtil-1/1N.
Orbit: ~400 km x ~770 km x 80° x 96.4 min
Decayed: 22 April 2002
Mission: TUBSAT-N is a German remote sensing microsatellite. 
Launch: These spacecrafts were launched by a modified combat ICBM, RSM-54 (U.S. name: SS-N-23) from a Russian submarine in the Barents sea.
Source: Jonathan Space Report No.  ; Spacewarn No. 537 & 582 ; National Space Science Data Center's 1998-042A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;  TUBSAT satellites ;
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Tubsat N1
Spacecraft: 
Chronologies: 1998 payload #81 ; 1998-042B ; 5572nd spacecraft.
Type: Communications (data ralay)
Sponsor: Germany's Technische Universitat Berlin (TUB)

Source: TUBSAT
Launch: 7 July 1998, from a Sub K407 in Barents Sea, by a Shtil-1/1N.
Orbit: ~400 km x ~770 km x 80° x 96.4 min
Decayed: 21 October 2000
Mission: TUBSAT-N1 is a German remote sensing microsatellite.
Source: Jonathan Space Report No.  ; Spacewarn No. 537 & 564 ; National Space Science Data Center's 1998-042B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ; TUBSAT satellites ;
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Resurs-O1 4
Spacecraft:  Resurs-O1 No. 4L
Chronologies: 1998 payload #82 ; 1998-043A ; 5573rd spacecraft.
Type: Earth remote sensing
Sponsor: Russia
Launch: 10 July 1998 at 6h30 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: 817 km x 845 km x 98.8° x 101.3 min
Decayed:
Mission: Resurs-O 1N4 is a Russian natural resources sensing satellite that also does ecological and meteorological monitoring.
Source: Jonathan Space Report No.  ; Spacewarn No. 537 ; National Space Science Data Center's 1998-043A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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FASAT-B / Fasat-Bravo
Spacecraft: 
Chronologies: 1998 payload #83 ; 1998-043B ; 5574th spacecraft.
Type: Technology
Sponsor: Chilean Air Force
Launch: 10 July 1998 at 6h30 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: 817 km x 845 km x 98.8° x 101.3 min
Decayed:
Mission: FASAT-B (B for Bravo) is a Chilean microsatellite that does remote-sensing of ozone and vegetation.
Source: Jonathan Space Report No.  ; Spacewarn No. 537 ; National Space Science Data Center's 1998-043B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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TMSAT-1 / TiungSat-1 (TO-31)
Spacecraft:  Thai-Microsatellite-OSCAR 31
Chronologies: 1998 payload #84 ; 1998-043C ; 5575th spacecraft.
Type: Earth observations and data relay
Sponsor: Bangkok'sThai Microsatellite Co. 
Launch: 10 July 1998 at 6h30 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: 817 km x 845 km x 98.8° x 101.3 min
Decayed:
Mission: TMSAT is a Thailand microsatellite that does remote-sensing of natural resources and vegetation.
Source: Jonathan Space Report No.  ; Spacewarn No. 537 ; National Space Science Data Center's 1998-043C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ; A Brief History of Amateur Satellites ;
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Gerswin-OSCAR 32 / Techsat 1B (GO-32)
Spacecraft: 
Chronologies: 1998 payload #85 ; 1998-043D ; 5576th spacecraft.
Type: Technology
Sponsor: Israel's Technion Institute of Technology
Launch: 10 July 1998 at 6h30 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: 817 km x 845 km x 98.8° x 101.3 min
Decayed:
Mission: TECHSAT 1B is an Israeli microsatellite that carries a ozone-sensing UV-spectral radiometer. 
Source: Jonathan Space Report No.  ; Spacewarn No. 537 ; National Space Science Data Center's 1998-043D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ; A Brief History of Amateur Satellites ;
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WESTPACT  (WPLTN-1)
Spacecraft:  Western Pacific Laser Tracking Network
Chronologies: 1998 payload #86 ; 1998-043E ; 5577th spacecraft.
Type: Geodesy
Sponsor: Australia
Launch: 10 July 1998 at 6h30 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: 817 km x 845 km x 98.8° x 101.3 min
Decayed:
Mission: WESTPAC is an Australian microsatellite.
Source: Jonathan Space Report No.  ; Spacewarn No. 537 ; National Space Science Data Center's 1998-043E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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SAFIR-2
Spacecraft: 
Chronologies: 1998 payload #87 ; 1998-043F ; 5578th spacecraft.
Type: Technology
Sponsor: Germany's OHB System of Bremen
Launch: 10 July 1998 at 6h30 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: 817 km x 845 km x 98.8° x 101.3 min
Decayed:
Mission: SAFIR 2 is a German microsatellite 
Source: Jonathan Space Report No.  ; Spacewarn No. 537 ; National Space Science Data Center's 1998-043F ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Sinosat 1 / Zhongwei 1
Spacecraft: 
Chronologies: 1998 payload #88 ; 1998-044A ; 5579th spacecraft.
Type: Communications (multi-service)
Sponsor: China's Sino Satellite Communications Co.
Launch: 18 July 1998 at 9h20 UTC, from Xichang Cosmodrome Space Launch Center's LC-2, by a Chang Zheng 3B (CZ3B-5).
Orbit: Geostationary at 110.5° East longitude
Mission: Sinosat  is a PRC communications spacecraft thatcarries 24 C-band and 14 Ku-band transponders to provide voice and video communications to the Asia- Pacific region.
Source: Jonathan Space Report No.  ; Spacewarn No. 537 ; National Space Science Data Center's 1998-044A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kosmos 2360
Spacecraft:  Tselina-2 no. 22
Chronologies: 1998 payload #89 ; 1998-045A ; 5580th spacecraft.
Type: Electronic intelligence
Sponsor: Russia's Defense ministry
Launch: 28 July 1998 at 9h15 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: 850 km x 878 km x 71° x 101.9 min
Decayed:
Mission: Kosmos 2360 is a Russian military spacecraft that is a member of the Tselina series that carries "signals intelligence" instruments.
Source: Jonathan Space Report No.  ; Spacewarn No. 537 ; National Space Science Data Center's 1998-045A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm B5
Spacecraft:  Orbcomm FM17
Chronologies: 1998 payload #90 ; 1998-046A ; 5581st spacecraft.
Type: Communications
Sponsor: U.S. Orbcomm inc.
Launch: 2 August 1998 at 16h24 UTC, from Wallops Island's DZWI, by a Pegasus XL/HAPS (F22).
Orbit:
Decayed:
Mission: Fourth group (of eight) Obrcomms spacecrafts
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-046A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm B6
Spacecraft:  Orbcomm FM18
Chronologies: 1998 payload #91 ; 1998-046B ; 5582nd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 2 August 1998 at 16h24 UTC, from Wallops Island's DZWI, by a Pegasus XL/HAPS (F22).
Orbit: 816 km x 826 km x 45° x 101 min
Decayed:
Mission: Second group of (eight) Orbcomms spacecrafts that are the latest additions to the fleet of relaying satellites that provides links between mobile or fixed telephones and their remote counterparts.
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-046B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm B7
Spacecraft:  Orbcomm FM19
Chronologies: 1998 payload #92 ; 1998-046C ; 5583rd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 2 August 1998 at 16h24 UTC, from Wallops Island's DZWI, by a Pegasus XL/HAPS (F22).
Orbit: 816 km x 826 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-046C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm B8
Spacecraft:  Orbcomm FM20
Chronologies: 1998 payload #93 ; 1998-046D ; 5584th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 2 August 1998 at 16h24 UTC, from Wallops Island's DZWI, by a Pegasus XL/HAPS (F22).
Orbit: 816 km x 826 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-046D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm B4
Spacecraft:  Orbcomm FM16
Chronologies: 1998 payload #94 ; 1998-046E ; 5585th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 2 August 1998 at 16h24 UTC, from Wallops Island's DZWI, by a Pegasus XL/HAPS (F22).
Orbit: 816 km x 826 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-046E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm B3
Spacecraft:  Orbcomm FM15
Chronologies: 1998 payload #95 ; 1998-046F ; 5586th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 2 August 1998 at 16h24 UTC, from Wallops Island's DZWI, by a Pegasus XL/HAPS (F22).
Orbit: 816 km x 826 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-045F ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm B2
Spacecraft:  Orbcomm FM14
Chronologies: 1998 payload #96 ; 1998-046G ; 5587th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 2 August 1998 at 16h24 UTC, from Wallops Island's DZWI, by a Pegasus XL/HAPS (F22).
Orbit: 816 km x 826 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-046G ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm B1
Spacecraft:  Orbcomm FM13
Chronologies: 1998 payload #97 ; 1998-046H ; 5588th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 2 August 1998 at 16h24 UTC, from Wallops Island's DZWI, by a Pegasus XL/HAPS (F22).
Orbit: 816 km x 826 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-046H; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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MERCURY 3
Spacecraft: 
Chronologies: 1998 payload #98 ; 1998 2nd loss ; 5589th spacecraft.
Type: Electronic intelligence
Sponsor: U.S. National Reconnaissance Office
Launch: 12 August 1998 at 11h30 UTC, from Cape Canaveral's LC-41, by a Titan 4A (Titan 401A 4A-20 K-174A-20, Centaur TC-9).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No. 425 ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Soyuz TM-28
Spacecraft:  Soyuz 7K-STM No. 77
Chronologies: 1998 payload #99 ; 1998-047A ; 5590th spacecraft.
Type: Piloted spacecraft
Sponsor: Russia (Korolev's Design Bureau)
Launch: 13 August 1998 at 9h43 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511U).
Orbit: 362 km x 364 km x 51.7° x 92 min
Decayed: 28 February 1999 at 2h14 UTC
Mission: Soyuz-TM 28 is a Russian cosmonaut-transporting vehicle that carries three cosmonauts to the Mir station; two of them will stay in Mir for 201 days. It docked manually with Mir on 15 August 1998 at 10h56 UTC. On 27 February 1999, Mir's EO-26 crew commander Gennady Padalka and Ivan Bella entered Soyuz TM-28 and undocked from the Kvant rear docking port at 22h52 UTC, landing in Kazakstan.
Source: Jonathan Space Report No. 390 ; Spacewarn No. 538 ; National Space Science Data Center's 1998-047A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 3
Spacecraft:  Iridium SV078
Chronologies: 1998 payload #100 ; 1998-048A ; 5591st spacecraft.
Type: Communications
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 19 August 1998 at 23h01 UTC, from Taiyuan Space Launch Center's LC-1, by a Chang Zheng 2C-III/SD (CZ2C-19).
Orbit: 612 km x 635 km x 86.4° x 98 min
Decayed:
Mission: Sixteenth group (of two) Iridiums that are the latest launches to enable fulfillment of the Iridium series; they replace the failed satellites in the series. The Iridium series is intended to provide links from/to telephones located far away from cellular areas.
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-048A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 76
Spacecraft: Iridium SV076
Chronologies: 1998 payload #101 ; 1998-048B ; 5592nd spacecraft.
Type: Communications
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 19 August 1998 at 23h01 UTC, from Taiyuan's LC-1, by a Chang Zheng 2C-III/SD (CZ2C-19).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; SpacewarnNo. 538 ; National Space Science Data Center's 1998-048B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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ST 1 / Singapore-Taiwan 1
Spacecraft: 
Chronologies: 1998 payload #102 ; 1998-049A ; 5593rd spacecraft.
Type: Communications (multi-service)
Sponsor: Singapore Telecom and Taiwan's Chunghwa Telecom.
Launch: 25 August 1998 at 23h07 UTC, from Kourou Space Center's ELA-2, by an Ariane 44P (V109).
Orbit: Geostationary at 88° East longitude
Mission: ST 1 is a Singapore/Taiwan (ROC) communications spacecraft that carries 16 Ku-band and 14 C-band transponders to provide voice and video communications to the Pacific rim and East-Asian countries. The 3,200 kg satellite
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-049A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Galaxy X
Spacecraft: 
Chronologies: 1998 payload #103 ; 1998 3rd loss ; 5594th spacecraft.
Type: Communications
Sponsor: Panamsat
Launch: 27 August 1998 at 1h17 UTC, from Cape Canaveral's LC-17B, by a Delta 3 (D3-1, 259).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Astra 2A
Spacecraft: 
Chronologies: 1998 payload #104 ; 1998-050A ; 5595th spacecraft.
Type: Communications
Sponsor: Luxembourg-based's SES / Societe Europeene des Satellites
Launch: 30 August 1998 at 0h31 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/DM-2M (8K82K 383-01 / DM3).
Orbit: Geostationary at 28.2° East longitude.
Mission: Astra 2A is a European communications spacecraft that provides voice and video communications to Europe through its 32 Ku-band transponders.
Source: Jonathan Space Report No.  ; Spacewarn No. 538 ; National Space Science Data Center's 1998-050A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Kwangmyongsong 1
Spacecraft:
Chronologies: 1998 payload #105 ; 1998 4th loss ; 5596th spacecraft.
Type: Technology
Sponsor: North Korea
Launch: 31 August 1998 at 3h07 UTC, from Musudan, by a Taepodong 1.
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.   Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 82
Spacecraft:  Iridium SV082
Chronologies: 1998 payload #106 ; 1998-051A ; 5597th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 8 September 1998 at 21h13 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 260).
Orbit: 520 km x 540 km x 86° x 95 min
Decayed:
Mission: Seventeenth group (of five) Iridiums that are the latest batch to join the American Iridium fleet and to replace the dysfunctional members of the fleet. The fleet provides telephone links between sites far away from cellular networks.
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-051A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 81
Spacecraft:  Iridium SV081
Chronologies: 1998 payload #107 ; 1998-051B ; 5598th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 8 September 1998 at 21h13 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 259).
Orbit: 520 km x 540 km x 86° x 95 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-051B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 80
Spacecraft:  Iridium SV080
Chronologies: 1998 payload #108 ; 1998-051C ; 5599th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 8 September 1998 at 21h13 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 259).
Orbit: 520 km x 540 km x 86° x 95 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-051C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 79
Spacecraft:  Iridium SV079
Chronologies: 1998 payload #109 ; 1998-051D ; 5600th spacecraft.
Type: Communications Iphone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 8 September 1998 at 21h13 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 259).
Orbit: 520 km x 540 km x 86° x 95 min
Decayed: 29 November 2000
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 & 566 ; National Space Science Data Center's 1998-051D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 77
Spacecraft:  Iridium SV077
Chronologies: 1998 payload #110 ; 1998-051E ; 5601st spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 8 September 1998 at 21h13 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 259).
Orbit: 520 km x 540 km x 86° x 95 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-051E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-5
Spacecraft: 
Chronologies: 1998 payload #111 ; 1998 5th loss ; 5602nd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission: First (and only) group of twelve Globalstars spacecrafts launched.
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-7
Spacecraft:
Chronologies: 1998 payload #112 ; 1998 6th loss ; 5603rd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-9
Spacecraft: 
Chronologies: 1998 payload #113 ; 1998 7th loss ; 5604th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-10
Spacecraft: 
Chronologies: 1998 payload #114 ; 1998 8th loss ; 5605th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-11
Spacecraft: 
Chronologies: 1998 payload #115 ; 1998 9th loss ; 5606th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-12
Spacecraft: 
Chronologies: 1998 payload #116 ; 1998 10th loss ; 5607th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-13
Spacecraft: 
Chronologies: 1998 payload #117 ; 1998 11th loss ; 5608th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-16
Spacecraft: 
Chronologies: 1998 payload #118 ; 1998 12th loss ; 5609th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-17
Spacecraft: 
Chronologies: 1998 payload #119 ; 1998 13th loss ; 5610th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-18
Spacecraft: 
Chronologies: 1998 payload #120 ; 1998 14th loss ; 5611th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-20
Spacecraft: 
Chronologies: 1998 payload #121 ; 1998 15th loss ; 5612th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Globalstar FM-21
Spacecraft: 
Chronologies: 1998 payload #122 ; 1998 16th loss ; 5613th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Space Systems/Loral
Launch: 9 September 1998 at 20h29 UTC, from Baykonur Cosmodrome's LC-45/1, by a J-1/Zenit-2.
Orbit: n/a
Mission:
Source: Jonathan Space Report No.  ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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PAS 7 / PanAmSat 7
Spacecraft: 
Chronologies: 1998 payload #123 ; 1998-052A ; 5614th spacecraft.
Type: Communications (multi-service)
Sponsor: Panamsat
Launch: 16 September 1998 at 6h31 UTC, from Kourou Space Center's ELA-2, by an Ariane 44LP (V110).
Orbit: Geostationary at 68.5° East longitude.
Mission: PAS 7 is an American communications spacecraft that carries 40 Ku-band and 18 C-band transponders to provide voice and video communications to Europe and West Asia.  The 3,838 kg satellite
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-052A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm C1
Spacecraft:  Orbcomm FM21
Chronologies: 1998 payload #124 ; 1998-053A ; 5615th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 23 September 1998 at 5h06 UTC, from Wallops Island's DZW1, by a Pegasus XL/HAPS (F23).
Orbit: 820 km x 830 km x 45° x 101 min
Decayed:
Mission: Fifth group (of eight) Obrcomms spacecrafts joins the fleet that enables voice and data communications from/to remote stations.
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-053A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm C2
Spacecraft:  Orbcomm FM22
Chronologies: 1998 payload #125 ; 1998-053B ; 5616th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 23 September 1998 at 5h06 UTC, from Wallops Island's DZW1, by a Pegasus XL/HAPS (F23).
Orbit: 820 km x 830 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-053B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm C3
Spacecraft:  Orbcomm FM23
Chronologies: 1998 payload #126 ; 1998-053C ; 5617th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 23 September 1998 at 5h06 UTC, from Wallops Island's DZW1, by a Pegasus XL/HAPS (F23).
Orbit: 820 km x 830 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's1998-053C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm C4
Spacecraft:  Orbcomm FM24
Chronologies: 1998 payload #127 ; 1998-053D ; 5618th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 23 September 1998 at 5h06 UTC, from Wallops Island's DZW1, by a Pegasus XL/HAPS (F23).
Orbit: 820 km x 830 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-053D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm C5
Spacecraft:  Orbcomm FM25
Chronologies: 1998 payload #128 ; 1998-053E ; 5619th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 23 September 1998 at 5h06 UTC, from Wallops Island's DZW1, by a Pegasus XL/HAPS (F23).
Orbit: 820 km x 830 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-053E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm C6
Spacecraft:  Orbcomm FM26
Chronologies: 1998 payload #129 ; 1998-053F ; 5620th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 23 September 1998 at 5h06 UTC, from Wallops Island's DZW1, by a Pegasus XL/HAPS (F23).
Orbit: 820 km x 830 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-053F ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm C7
Spacecraft:  Orbcomm FM27
Chronologies: 1998 payload #130 ; 1998-053G ; 5621st spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 23 September 1998 at 5h06 UTC, from Wallops Island's DZW1, by a Pegasus XL/HAPS (F23).
Orbit: 820 km x 830 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-053G ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Orbcomm C8
Spacecraft:  Orbcomm FM28
Chronologies: 1998 payload #131 ; 1998-053H ; 5622nd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Orbcomm inc.
Launch: 23 September 1998 at 5h06 UTC, from Wallops Island's DZW1, by a Pegasus XL/HAPS (F23).
Orbit: 820 km x 830 km x 45° x 101 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-053H ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Molniya 1-91
Spacecraft: 
Chronologies: 1998 payload #132 ; 1998-054A ; 5623rd spacecraft.
Type: Communications
Sponsor: Russia
Launch: 28 September 1998 at 23h41 UTC, from Plesetsk Cosmodroem's LC-43/3, by an A-2-e/"Molniya" (8K78M / ML).
Orbit: 457 km x 40,860 km x 62.8° x 12 hr 17 min
Decayed:
Mission: Molniya 1-91 is a Russian military communications spacecraft with its apogee over the Northern Hemisphere.
Source: Jonathan Space Report No.  ; Spacewarn No. 539 ; National Space Science Data Center's 1998-054A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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STEX (USA 140)
Spacecraft: Space Technology EXperiments
Chronologies: 1998 payload #133 ; 1998-055A ; 5624th spacecraft.
Type: Technology
Sponsor: U.S. National Reconnaissance Office
Launch: 3 October 1998 at 10h04 UTC, from Vandenberg Air Force Base's LC-576E, by a Taurus (T3).
Orbit:
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-055A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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ATEX (USA 141)
Spacecraft:  Advanced Tether EXperiment
Chronologies: 1998 payload #134 ; 1998-055C ; 5625th spacecraft.
Type: Technology
Sponsor: U.S. National Reconnaissance Office
Launch: 3 October 1998 at 10h04 UTC, from Vandenberg Air Force Base's LC-576E, by a Taurus (T3).
Orbit:
Decayed:
Mission:
     The ATeX advanced tether experiment reportedly failed on 16 January 1999. The ATeX lower end mass was meant to remain attached to the STEX parent spacecraft, but with only 21 meters of tether deployed, it appears the tether was so far off vertical that automatic safety systems jettisoned the base to protect the remainder of the STEX satellite. Thus, the upper and lower ATeX endmasses are in orbit as one object connected by a 21-meter tether, and designated USA 141 (1998-55C). The main STEX satellite is in orbit as a separate object, 1998-55A.
Source: Jonathan Space Report No. 386 ; Spacewarn No. 543 ; National Space Science Data Center's 1998-055C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Eutelsat W2
Spacecraft: 
Chronologies: 1998 payload #135 ; 1998-056A ; 5626th spacecraft.
Type: Communications (DBS)
Sponsor: European Telecommunications Satellite Organization
Launch: 8 October 1998 at 22h51 UTC, from Kourou Space Center's ELA-2, by an Ariane 44L (V111).
Orbit: Geostationary at 16° East longitude
Mission: Eutelsat W2 is a communications spacecraft that provides direct-to-home voice and video communications to North Africa, the Middle East and Europe through its 24 (Ku-band?) transponders. The 2,900 kg spacecraft will
Source: Jonathan Space Report No. 490 ; Spacewarn No. 540 ; National Space Science Data Center's 1998-056A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Sirius 3
Spacecraft: 
Chronologies: 1998 payload #136 ; 1998-056B ; 5627th spacecraft.
Type: Communications (multi-service)
Sponsor: Swedish `Nordiska Satellite' consortium (NSAB)
Launch: 8 October 1998 at 22h51 UTC, from Kourou Space Center's ELA-2, by an Ariane 44L (V111).
Orbit: Geostationary at ~5° East longitude
Mission: SIRIUS 3 is a Swedish communications spacecraft that provides voice and video communications to Northern Europe and Scandinavia through 15 Ku-band 44 watt transponders. The 1,500 kg spacecraft will
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-056B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Hot Bird 5 / Eutelsat HB5
Spacecraft:
Chronologies: 1998 payload #137 ; 1998-057A ; 5628th spacecraft.
Type: Communications (DBS)
Sponsor: Eutelsat
Launch: 9 October 1998 at 22h50 UTC, from Cape Canaveral's SLC-36B, by an Atlas IIA (AC-134).
Orbit: Geostationary at 13° East longitude
Decayed:
Mission: Hot Bird 5 is a direct-broadcast communications spacecraft provides voice and video communications to Europe through 22 Ku-band transponders..
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-057A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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UFO F9 
Spacecraft:  UHF F/O F9
Chronologies: 1998 payload #138 ; 1998-058A ; 5629th spacecraft.
Type: Communications
Sponsor: U.S. Naval Space Command
Launch: 20 October 1998 at 7h19 UTC, from Cape Canaveral's SLC-36A, by an Atlas IIA (AC-130).
Orbit: Geostationary 
Mission: UHF F/O F9 is an American military communications
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-058A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Maqsat 3
Spacecraft: 
Chronologies: 1998 payload #139 ; 1998-059A ; 5630th spacecraft.
Type: Technology
Sponsor: ESA
Launch: 21 October 1998 at 16h37 UTC, from Kourou Space Center's ELA-3, by an Ariane 5 (503, V112).
Orbit: 1,152 km x 36,612 km x 7.0° x 666 min
Decayed:
Mission: Maqsat 3 is a dummy payload to test the performance of the latest model of the Ariane series, Ariane 5.
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-059A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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ARD
Spacecraft:  Atmospheric Reentry Demo
Chronologies: 1998 payload #140 ; 1998-059 ; 5631st spacecraft.
Type: Technology
Sponsor: ESA
Launch: 21 October 1998 at 16h37 UTC, from Kourou Space Center's ELA-3, by an Ariane 5 (503, V112).
Orbit:
Decayed:
Mission: The Ariant 5 rocket released an atmospheric re-entry demonstrator (ARD).
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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SCD-2
Spacecraft:  Satelite de Coleta de Dados (Data Collection Satellite)
Chronologies: 1998 payload #141 ; 1998-060A ; 5632nd spacecraft.
Type: Communications (data relay)
Sponsor: Brazil's Instituto Nacional de Pesquisas Espacias (INPE)
Launch: 23 October 1998 at 0h02 UTC, from Cape Canaveral's RW-30/20, by a Pegasus H (F24 / P-33).
Orbit: 743 km x 769 km x 25.0° x 99.9 min
Decayed:
Mission: SCD 2 is a Brazilian (ground) environmental data relaying mini-spacecraft.
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-060A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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DS 1 / Deep Space 1
Spacecraft:
Chronologies: 1998 payload #142 ; 1998-061A ; 5633th spacecraft.
Type: Planetary probe
Sponsor: NASA
Launch: 24 October 1998 at 12h08 UTC, from Cape Canaveral's SLC-17A, by a Delta 7925 (Delta 7326-9.5 261).
Orbit:
Decayed:
Mission: Deep Space 1 is an experimental American spacecraft that was sent into deep space by an ion-propulsion engine after being launched by a Delta 2 rocket. The drum-shaped 486-kg probe, which carries 80 kg of ionizable Xenon gas, was aimed to rendezvous with the asteroid 1992-KD in September 1999 and then move on to one or more cometary encounters. Ion propulsion engines require a smaller fuel mass though providing smaller acceleration compared to chemical fuels. The probe was launched into solar orbit with a perihelion near that of the Earth and an aphelion half way to the orbit of Mars. Managed by JPL, tt is the first of NASA's New Millennium missions to test advanced space technology, and featured experimental on-board software, miniature sensors, and the first use of an ion engine for extensive orbital changes. DS1 is the first craft to use ion drive to reach a target orbit.
     Deep Space 1 made a flyby of minor planet (9969) Braille on 29 July 1999 at 4h46 UTC. Flyby distance was less than 25 km and possibly as little as 15 km. DS 1 failed to point its camera to image the target at closest approach, but the navigation system was successful in bringing the vehicle close to the asteroid, and longer range IR imaging was successful.
     The early tests of its ion engine in November 19980-January 1999 increased the aphelion by 6 million km.  A second burn phase in March-April 1999 increased perihelion by 4.8 million km, leaving DS1 in an orbit which flew past minor planet (9969) Braille in July 1999 near aphelion. A third burn phase in July-October 1999 raised perihelion by 10 million km more, and lowered inclination to 0.2 deg. In the meantime, on 18 September 1999, DS1 had successfuly completed its primary mission. 
     The failure of DS1's star tracker soon afterwards left a follow-on mission in doubt - without the star tracker, DS1 did not know which way it was pointing, which makes it hard to steer. In a remarkable success for JPL, the DS1 team reprogrammed the spacecraft to use images from its MICAS science camera - with a field of view a hundred times smaller than the star tracker - and reformat them into a data stream compatible with the navigation system. They were helped by one of DS1's advanced technology tests, an autonomous navigation software package that used MICAS data, but its processing is only the first step in a long chain of software, so it's darn impressive that they managed to make it work.  They can only fire the ion engine in directions where they can see an appropriately bright guide star in the MICAS. Developing a way of navigating using as few stars as possible was another challenge: only half a dozen will be needed for its new target, comet 19P/Borrelly, which requires a much bigger orbit change than the earlier burns. The trajectory can be fine-tuned by changing the date on which one star is replaced by another. After a massive effort, all was ready by June, with the ion engine starting again on Jun 28. DS1 will encounter comet 19P/Borrelly in September 2001.
Source: Jonathan Space Report No. 405 & 430 ; Spacewarn No. 540 ; National Space Science Data Center's 1998-061A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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SEDSAT / SEDSat-OSCAR 33
Spacecraft:  Students for the Exploration and Development of Space
Chronologies: 1998 payload #143 ; 1998-061B ; 5634th spacecraft.
Type: Communications (radio-amateur)
Sponsor: U.S. University of Huntsville, Alabama & Students for the Exploration and Development of Space (SEDS) 
Launch: 24 October 1998 at 12h08 UTC, from Cape Canaveral's SLC-17A, by a Delta 7925 (Delta 7326-9.5 261).
Orbit: 547 km x 1,079 km x 101 min x 31.4°
Decayed:
Mission: SEDSAT 1 is an American mini-spacecraft that obtains images of the Earth and distribute them through the Web from the University of Alabama. It also serves as a relay for amateur radio communications.
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-061B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ; A Brief History of Amateur Satellites ;
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Progress M-40 / Znamya-2.5
Spacecraft: Progress 7K-TGM No 239
Chronologies: 1998 payload #144 ; 1998-062A ; 5635th spacecraft.
Type: Cargo delivery to Mir
Sponsor: Russia (Korolev's Design Bureau)
Launch: 25 October 1998 at 4h14 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511U).
Orbit:
Decayed: 5 February 1999
Mission: Progress M-40 is a Russian automatic cargo ship that carries cargo to the Mir space station. It carried 7,285 kg of cargo including 400 kg of fuel, 2,500 kg of food, water, and scientific/engineering equipment required for the experiment (Znamia 2.5) to reflect Sun light toward Earth. It docked with Mir on 27 October 1998. (It may be the last flight of the Progress series since MIR may be deorbited into the Pacific in mid-1999.)
. The Progress M-40 cargo craft undocked on 4 February 1999 at 9h59 UTC, but the attempt to deploy the Znamya-2.5 reflector ran into trouble when it  caught on an antenna. Two attempts failed to deploy the antenna and the experiment was abandoned. Progress M-40 fired its engines for the deorbit burn at 1016 UTC on Feb 5 and reentered over the Pacific.
The Znamya-2.5 
reflector experiment:		      The deployed 25-meter diameter Znamya-2.5 reflector may be visible from as a flash brighter than the full Moon in various locations around the world.  The reflector, attached to the nose of Progress, was to have reflected a patch of sunlight about 6-km wide on the surface. Znamya-2.5 is developed by the Space Regatta Consortium (SRC), led by the RKK Energiya company which operates Mir. Mir commander Padalka was to have used the TORU manual control system to point the reflector at the Earth. An earlier experiment, Znamya-2, was carried out in February 1993. Astronomers have expressed concern about the potential that experiments like Znamya may interfere with  observations of the night sky. Although Znamya-2.5 itself isn't really a big deal, the fact that there is currently no international regulation controlling the launching of bright satellites which could destroy sensitive astronomical detectors (or, as some have suggested, replace the romantic night sky with orbiting billboards for Coke and Microsoft...) has led the International Astronomical Union to oppose the Znamya-2.5 experiment on the grounds of the precedent it would set.  SRC's long term idea is that Znamya could lead to a constellation of huge space mirrors to illuminate Arctic cities, which raises a lot of environmental, political and practical concerns. Nevertheless, Znamya-2.5 is also an important test of the technology of deployable large structures and solar sails, with many useful potential applications, and presumably Energiya's main intention is that the publicity will generate Western contracts for further, less controversial, experiments with deployable structures which would use their expertise.
Source: Jonathan Space Report No. 387, 388  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-062A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Afristar
Spacecraft: 
Chronologies: 1998 payload #145 ; 1998-063A ; 5636th spacecraft.
Type: Radio diffusion ()
Sponsor: WorldSpace satellite
Launch: 28 October 1998 at 22h16 UTC, from Kourou Space Center's ELA-2, by an Ariane 44L (V113).
Orbit: Geostationary
Decayed:
Mission: Afristar is a digital radio communicationsspacecraft that enables radio communications to North African countries.
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-063A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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GE-5
Spacecraft: 
Chronologies: 1998 payload #146 ; 1998-063B ; 5637th spacecraft.
Type: Communications (multi-service)
Sponsor: GE Americom
Launch: 28 October 1998 at 22h16 UTC, from Kourou Space Center's ELA-2, by an Ariane 44L (V113).
Orbit: Geostationary
Mission: GE 5 is an American communications spacecraft that was launched to provide voice and video communications to North America.
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-063B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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STS-95
Spacecraft:  Space Shuttle #92 ; Discovery (25th flight)
Chronologies: 1998 payload #147 ; 1998-064A ; 5638th spacecraft.
Type: Piloted spacecraft
Sponsor: NASA
Launch: 29 October 1998 at 19h19 UTC, from Cape Canaveral's LC-39B, by the Space Shuttle.
Orbit: 551 km x 561 km x 28.5° x 95.8 min
Decayed:
Mission: STS-95 carried resources for 80 microgravity experiments, a mini-communications spacecraft named PANSAT that was released on 30 October 1998 at 17:20 UT, the SPARTAN 201 solar observatory for deployment/recapture (on 1 November/3 November), and seven astronauts. One astronaut is a 77-year-old U.S. Senator (and the first American to orbit, 36 years ago) who will enable the first set of data on microgravity's effect on the aging process. 
Source: Jonathan Space Report No.  ; Spacewarn No. 540 ; National Space Science Data Center's 1998-064A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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PANSAT / PANSAT-OSCAR 34 (PO-34)
Spacecraft:  Petite Amateur Navy Satellite
Chronologies: 1998 payload #148 ; 1998-064B ; 5639th spacecraft.
Type: Communications (radio-amateur)
Sponsor: U.S. Naval Postgrad School at Monterey
Launch: 29 October 1998 at 19h19 UTC, from Cape Canaveral's LC-39B, by the Space Shuttle. Deployed from Discovery payload bay on   at 17:20 UT
Orbit:
Decayed:
Mission: PANSAT is a microsatellite design to provides an amateur radio store-and-forward message system. This amateur satellite is unique among the PACSAT style satellites in that it will employ direct sequence spread-spectrum communications.  PANSAT serves to train students at the Naval Postgraduate School. Initial orbital parameters were close to those of STS 95.
Source: Jonathan Space Report No. 387 ; Spacewarn No. 540 ; National Space Science Data Center's 1998-064B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ; A Brief History of Amateur Satellites ;
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Spartan 201-5
Spacecraft: 
Chronologies: 1998 payload #149 ; 1998-064C ; 5640th spacecraft.
Type: Astronomy
Sponsor: NASA
Launch: 29 October 1998 at 19h19 UTC, from Cape Canaveral's LC-39B, by the Space Shuttle. Deployed from Discovery payload bay on 3 November 1998.
Orbit: 551 km x 561 km x 28.5° x 95.8 min
Retrieve: by STS 95 on 3 November 1998 at 08:48 UT.
Mission: Spartan 201-05 is an American solar observatory that was released and recaptured by the Shuttle STS 95. It made 43 hours of solar corona monitoring with its white light (WLC) and ultraviolet (UVCS) cameras.  The data assists in the recalibration of the SOHO spacecraft instruments. SOHO was resurrected after some months of hibernation.
Source: Jonathan Space Report No.  ; Spacewarn No. 541 ; National Space Science Data Center's 1998-064C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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PAS 8 / PanAmSat 8
Spacecraft: 
Chronologies: 1998 payload #150 ; 1998-065A ; 5641st spacecraft.
Type: Communications (DBS)
Sponsor: Panamsat
Launch: 4 November 1998 at 5h12 UTC, from Baykonur Cosmodrome's LC-81/23, by a D-1-e/Proton-K/DM-2M (8K82K / DM3).
Orbit: Geostationary at 166° East longitude
Mission: PAS 8 is an American communications spacecraft that carries 24 C-band and 24 Ku-band transponders to provide television channels.
Source: Jonathan Space Report No.  ; Spacewarn No. 541 ; National Space Science Data Center's 1998-065A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 2
Spacecraft:  Iridium SV087
Chronologies: 1998 payload #151 ; 1998-066A ; 5642nd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 6 November 1998 at 13h37 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 262).
Orbit: 517 km x 536 km x 86° x 95 min
Decayed:
Mission: Eighteenth group (of five) Iridiums that are communications spacecraft of the Iridium consortium. The Iridium fleet enables voice and data communications from/to phones located far away from cellular networks.
Source: Jonathan Space Report No.  ; Spacewarn No. 541 ; National Space Science Data Center's 1998-066A ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 86
Spacecraft:  Iridium SV086
Chronologies: 1998 payload #152 ; 1998-066B ; 5643rd spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 6 November 1998 at 13h37 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 262).
Orbit: 517 km x 536 km x 86° x 95 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 541 ; National Space Science Data Center's 1998-066B ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 85
Spacecraft:  Iridium SV085
Chronologies: 1998 payload #153 ; 1998-066C ; 5644th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 6 November 1998 at 13h37 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 262).
Orbit: 517 km x 536 km x 86° x 95 min
Decayed: 30 December 2000
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 541 & 566 ; National Space Science Data Center's 1998-066C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Iridium 84
Spacecraft:  Iridium SV084
Chronologies: 1998 payload #154 ; 1998-066D ; 5645th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 6 November 1998 at 13h37 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 262).
Orbit: 517 km x 536 km x 86° x 95 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 541 ; National Space Science Data Center's 1998-066D ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
..
Iridium 83
Spacecraft:  Iridium SV083
Chronologies: 1998 payload #155 ; 1998-066E ; 5646th spacecraft.
Type: Communications (phone)
Sponsor: U.S. Motorola inc.

Source: Iridium
Launch: 6 November 1998 at 13h37 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 7925 (Delta 7920-10C 262).
Orbit: 517 km x 536 km x 86° x 95 min
Decayed:
Mission:
Source: Jonathan Space Report No.  ; Spacewarn No. 541 ; National Space Science Data Center's 1998-066E ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ;
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Sputnik 41 / Radio Sputnik 18 (RS-18)
Spacecraft: 
Chronologies: 1998 payload #156 ; 1998-062C ; 5647th spacecraft.
Type: Communications (radio-amateur)
Sponsor: Aéro-club de France, the Russian Aeronautical Federation and AMSAT-France
Launch: 25 October 1998 at 4h14 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511U).
Orbit:
Decayed: 11 January 1999
Mission: Sputnik 41, also called RS-18, was tossed by hand at the start of the spacewalk by Cosmonauts Gennady Padalka and Sergei Avdeyev. (Padalka told Avdeyev to "toss it gently toward the moon".)
Source: Jonathan Space Report No.  ; Spacewarn No. 543 ; National Space Science Data Center's 1998-062C ; Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; TRW Space Log ; A Brief History of Amateur Satellites ;
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