Home 1975 Summary
1974 spacecrafts 1976 spacecrafts
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The 168 spacecrafts launched in 1975 :
1) Soyuz 17 2) Kosmos 702 / Zenit-2M 3) Kosmos 703 / DS-P1-Yu 70 4) Landsat 2 / ERTS 2
5) Kosmos 704 / Zenit-4MK 6) Kosmos 705 / DS-P1-Yu 75 7) Kosmos 706 / Oko 8) Kosmos 707 / Tselina-O
9) Molniya 2-12 10) Starlette 11) SMS 2 12) Kosmos 708 / Sfera
13) Kosmos 709 / Zenit-4MK 14) Intelsat 4G 15) SRATS / Taiyo 16) Kosmos 710 / Zenit-4MK
17) Kosmos 711 / Strela-1M 18) Kosmos 712 / Strela-1M 19) Kosmos 713 / Strela-1M 20) Kosmos 714 / Strela-1M
21) Kosmos 715 / Strela-1M 22) Kosmos 716 / Strela-1M 23) Kosmos 717 / Strela-1M 24) Kosmos 718 / Strela-1M
25) SDS 3 / Jumpseat 4 26) Kosmos 719 / Zenit-4MK 27) Kosmos 720 / Zenit-4MT (Orion) 28) Kosmos 721 / Zenit-2M
29) Nauka [19] 30) Kosmos 722 / Zenit-4MK 31) Intercosmos 13 32) Meteor 1-21
33) Kosmos 723 / US-A 34) April 5 anomaly 35) Kosmos 724 / US-A 36) Kosmos 725 / DS-P1-Yu 77
37) GEOS 3 38) Kosmos 726 / Parus 39) P72-2 40) Molniya 3-2
41) Kosmos 727 / Zenit-4MK 42) Kosmos 728 / Zenit-2M 43) Nauka [20] 44) Titan Samos 44 / KH-8 44 GAMBIT
45) Aryabhata 46) Kosmos 729 / Tsiklon 47) Kosmos 730 / Zenit-4MK 48) Molniya 1-29
49) Explorer 53 / SAS 3 50) Anik 3 / Telesat C 51) D5-A Pollux 52) D5-B / Castor
53) DSCS 2-5 54) DSCS 2-6 55) Kosmos 731 / Zenit-2M 56) Nauka [21]
57) Intelsat 4H 58) Block 5C (#3) / DMSP Block-5C F2 59) Soyuz 18 60) Kosmos 732 / Strela-1M
61) Kosmos 733 / Strela-1M 62) Kosmos 734 / Strela-1M 63) Kosmos 735 / Strela-1M 64) Kosmos 736 / Strela-1M
65) Kosmos 737 / Strela-1M 66) Kosmos 738 / Strela-1M 67) Kosmos 739 / Strela-1M 68) Kosmos 740 / Zenit-4MK
69) Kosmos 741 / Gektor-Priroda 70) Intercosmos 71) Kosmos 742 / Zenit-4MK 72) Molniya 1-30
73) SRET 2 74) Venera 9 75) Big Bird 10 / KH-9 10 HEXAGON 76) SSU 1
77) Nimbus 6 78) Kosmos 743 / Zenit-4MK 79) Venera 10 80) CANYON 6
81) Kosmos 744 / Tselina-D 82) OSO 8 83) Kosmos 745 / DS-P1-Yu 76 84) Kosmos 746 / Zenit-4MK
85) Kosmos 747 / Zenit-2M 86) Nauka [22] 87) Kosmos 748 / Zenit-4MK 88) Kosmos 749 / Tselina-O
89) Molniya 2-13 90) Meteor 2-4 91) Soyuz 19 92) Apollo ASTP
93) Kosmos 750 / DS-P1-I 15 94) Kosmos 751 / Zenit-2M 95) Kosmos 752 / Vektor 96) JSSW 3 ("Chinasat 3")
97) Kosmos 753 / Zenit-4MK 98) COS B 99) Kosmos 754 / Zenit-4MK 100) Kosmos 755 / Parus
101) Viking 1 Orbiter 102) Viking 1 Lander 103) Kosmos 756 / Tselina-D 104) Symphonie 2
105) Kosmos 757 / Zenit-4MK 106) Molniya 1-31 107) Kosmos 758 / Yantar'-2K 3 108) Molniya 2-14
109) ETS 1 / Kiku-1 110) Viking 2 Orbiter 111) Viking 2 Lander 112) Kosmos 759 / Zenit-4MT (Orion)
113) Kosmos 760 / Zenit-4MK 114) Kosmos 761 / Strela-1M 115) Kosmos 762 / Strela-1M 116) Kosmos 763 / Strela-1M
117) Kosmos 764 / Strela-1M 118) Kosmos 765 / Strela-1M 119) Kosmos 766 / Strela-1M 120) Kosmos 767 / Strela-1M
121) Kosmos 768 / Strela-1M 122) Meteor 1-22 123) Kosmos 769 / Zenit-2M 124) Kosmos 770 / Sfera
125) Kosmos 771 / Zenit-4MKT (Fram) 126) Intelsat 4A F-1 127) D-2B Aura 128) Kosmos 772  (Soyuz)
129) Kosmos 773 / Strela-2 130) Kosmos 774 / Zenit-4MK 131) Explorer 54 / AE-D 132) Kosmos 775 / Oko? / SPRN No. 1
133) Titan Samos 45 / KH-8 45 GAMBIT 134) TIP 2 / Triad 2 135) Luna 136) GOES 1 / SMS 3
137) Kosmos 776 / Zenit-2M 138) Nauka [23] 139) Kosmos 777 / US-P 140) Kosmos 778 / Parus
141) Kosmos 779 / Zenit-4MK 142) Molniya 3-3 143) Soyuz 20 144) Explorer 55 / AE-E
145) Kosmos 780 / Zenit-2M 146) Nauka [24] 147) Kosmos 781 / Tselina-O 148) Kosmos 782 / Bion 3
149) FSW 1-01 ("Chinasat 4") 150) Kosmos 783 / Strela-2 151) Kosmos 784 / Zenit-2M 152) Nauka [25]
153) Big Bird 11 / KH-9 11 HEXAGON 154) Hitchhiker 38 155) Explorer / DAD-A 156) Explorer / DAD-B
157) Intercosmos 14 158) Kosmos 785 / US-A 159) RCA Satcom 1 160) IMEWS 5 / DSP 8
161) JSSW 4 (Chinasat 5") 162) Kosmos 786 / Zenit-4MK 163) Molniya 2-15 164) Kosmos / I2P (Lira)
165) Prognoz 4 166) Raduga 1 (Statsionar-1) 167) Meteor 1-23 164) Molniya 3-4
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Spacecraft Entries
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Soyuz 17
Spacecraft:  Soyuz 7K-T No. 38
Numbers: 1975 payload #1 ; 1975-001A ; 2069th spacecraft.
Type: Piloted spacecraft
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 11 January 1975 at 21h43 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 702
Spacecraft:  Zenit-2M
Numbers: 1975 payload #2 ; 1975-002A ; 2070th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 17 January 1975 at 9h07 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 703
Spacecraft:  DS-P1-Yu No. 70
Numbers: 1975 payload #3 ; 1975-003A ; 2071st spacecraft.
Type: Military technologies
Sponsor: Soviet Union's Defense ministry
Launch: 21 January 1975 at 11h05 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Landsat 2 / ERTS 2
Spacecraft:  Landsat B / ERTS B
Numbers: 1975 payload #4 ; 1975-004A ; 2072nd spacecraft.
Type: Earth remote sensing
Sponsor: NASA
Launch: 22 January 1975 at 17h56 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2310 (Delta 2910 598 / Delta 107).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 704
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #5 ; 1975-005A ; 2073rd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 23 January 1975 at 11h02 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 705
Spacecraft:  DS-P1-Yu No. 75
Numbers: 1975 payload #6 ; 1975-006A ; 2074th spacecraft.
Type: Military technologies
Sponsor: Soviet Union's Defense ministry
Launch: 28 January 1975 at 12h05 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 706
Spacecraft:  Oko
Numbers: 1975 payload #7 ; 1975-007A ; 2075th spacecraft.
Type: Missible early warning
Sponsor: Soviet Union's Defense ministry
Launch: 30 January 1975 at 15h02 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 707
Spacecraft:  Tselina-O
Numbers: 1975 payload #8 ; 1975-008A ; 2076th spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 5 February 1975 at 13h12 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53753-212).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Molniya 2-12
Spacecraft: 
Numbers: 1975 payload #9 ; 1975-009A ; 2077th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 6 February 1975 at 4h48 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Starlette
Spacecraft: 
Numbers: 1975 payload #10 ; 1975-010A ; 2078th spacecraft.
Type: Geodesy
Sponsor: France's CNES
Launch: 6 February 1975 at 16h35 UTC, from Kourou Space Center's ELD, by a Diamant BP.4 (No. 1).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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SMS 2
Spacecraft:  SMS B ; Synchronous Meteorological Satellite
Numbers: 1975 payload #11 ; 1975-011A ; 2079th spacecraft.
Type: Meteorology
Sponsor: NASA
Launch: 6 February 1975 at 22h04 UTC, from Cape Canaveral's LC-17B, by a Delta 2914 (Delta 2914 593 / Delta 108).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 708
Spacecraft:  Sfera
Numbers: 1975 payload #12 ; 1975-012A ; 2080th spacecraft.
Type: Geodesy
Sponsor: Soviet Union
Launch: 12 February 1975 at 3h21 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-166).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 709
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #13 ; 1975-013A ; 2081st spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 12 February 1975 at 14h38 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Intelsat 4G
Spacecraft:  Intelsat 4 F-6
Numbers: 1975 payload #14 ; 1975 1st loss ; 2082nd spacecraft.
Type: Communications
Sponsor: Intelsat
Launch: 20 February 1975 at 23h34 UTC, from Cape Canaveral's LC-36A, by an Atlas-Centaur (Atlas SLV-3D AC-33 / Centaur D-1AR 5015D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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SRATS / TaIyo
Spacecraft:  SS-03
Numbers: 1975 payload #15 ; 1975-014A ; 2083rd spacecraft.
Type: Earth upper atmosphere studies
Sponsor: Japan's ISAS
Launch: 24 February 1975 at 5h25 UTC, from Kagoshima Space Center's M, by a Mu-3S (M-3C-2).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 710
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #16 ; 1975-015A ; 2084th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 26 February 1975 at 9h07 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 711
Spacecraft:  Strela-1M
Numbers: 1975 payload #17 ; 1975-016A ; 2085th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 712
Spacecraft:  Strela-1M
Numbers: 1975 payload #18 ; 1975-016B ; 2086th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 713
Spacecraft:  Strela-1M
Numbers: 1975 payload #19 ; 1975-016C ; 2087th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 714
Spacecraft:  Strela-1M
Numbers: 1975 payload #20 ; 1975-016D ; 2088th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 715
Spacecraft:  Strela-1M
Numbers: 1975 payload #21 ; 1975-016E ; 2089th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 716
Spacecraft:  Strela-1M
Numbers: 1975 payload #22 ; 1975-016F ; 2090th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 717
Spacecraft:  Strela-1M
Numbers: 1975 payload #23 ; 1975-016G ; 2091st spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 718
Spacecraft:  Strela-1M
Numbers: 1975 payload #24 ; 1975-016H ; 2092nd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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SDS 3 / Jumpseat 4
Spacecraft: 
Numbers: 1975 payload #25 ; 1975-017A ; 2093rd spacecraft.
Type: Electronic intelligence
Sponsor: U.S. Air Force
Launch: 10 March 1975 at 4h41 UTC, from Vandenberg Air Force Base's SLC-4W, by a Titan 34B (3B-50 (34B-1) / Ascent Agena D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 719
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #26 ; 1975-018A ; 2094th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 12 March 1975 at 8h52 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 720
Spacecraft:  Zenit-4MT (Orion)
Numbers: 1975 payload #27 ; 1975-019A ; 2095th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 21 March 1975 at 6h57 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 721
Spacecraft:  Zenit-2M
Numbers: 1975 payload #28 ; 1975-020A ; 2096th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 26 March 1975 at 8h52 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Nauka
Spacecraft:  [Nauka #19]
Numbers: 1975 payload #29 ; 1975-020F ; 2097th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 26 March 1975 at 8h52 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
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Kosmos 722
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #30 ; 1975-021A ; 2098th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 27 March 1975 at 8h09 UTC, from Baykonur CosmodromeZ's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Intercosmos 13
Spacecraft:  DS-U2-IK No. 5
Numbers: 1975 payload #31 ; 1975-022A ; 2099th spacecraft.
Type: Earth/space studies
Sponsor: Soviet Union + East European countries
Launch: 27 March 1975 at 14h30 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-268).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Meteor 1-21
Spacecraft:  Meteor-MV
Numbers: 1975 payload #32 ; 1975-023A ; 2100 th spacecraft.
Type: Meteorology
Sponsor: Soviet Union
Launch: 1st April 1975 at 12h28 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 723
Spacecraft:  US-A
Numbers: 1975 payload #33 ; 1975-024A ; 2101st spacecraft.
Type: Ocean surveillance ("RORSAT")
Sponsor: Soviet Union's Defense ministry
Launch: 2 April 1975 at 11h02 UTC, from Baykonur Cosmodrome's LC-90/20, by a F-1/Tsyklon 2.
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Soyuz' April 5, anomaly
Spacecraft:  Soyuz 7K-T No. 39
Numbers: 1975 payload #34 ; 1975 2nd loss ; 2102nd spacecraft.
Type: Piloted spacecraft
Sponsor: Soviet Union's Defense ministry
Launch: 5 April 1975 at 11h02 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 724
Spacecraft:  US-A
Numbers: 1975 payload #35 ; 1975-025A ; 2103rd spacecraft.
Type: Ocean surveillance ("RORSAT")
Sponsor: Soviet Union's Defense ministry
Launch: 7 April 1975 at 11h02 UTC, from Baykonur Cosmodrome's LC-90, by a F-1/Tsyklon 2.
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 725
Spacecraft:  DS-P1-Yu No. 77
Numbers: 1975 payload #36 ; 1975-026A ; 2104th spacecraft.
Type: Military technologies
Sponsor: Soviet Union's Defense ministry
Launch: 8 April 1975 at 18h30 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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GEOS 3
Spacecraft:  GEOS C / Geodynamics Experimental Ocean Satellite
Numbers: 1975 payload #37 ; 1975-027A ; 2105th spacecraft.
Type: Meteorology
Sponsor: NASA
Launch: 9 April 1975 at 23h58 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2914 (Delta 2410 584 / Delta 109).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 726
Spacecraft:  Parus
Numbers: 1975 payload #38 ; 1975-028A ; 2106th spacecraft.
Type: Navigation
Sponsor: Soviet Union's Defense ministry
Launch: 11 April 1975 at 7h55 UTC, from Plesetsk Cosmodrome's  LC-132, by a Kosmos C-1 (11K65M 65033-203).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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P72-2
Spacecraft: 
Numbers: 1975 payload #39 ; 1975 3rd loss ; 2107th spacecraft.
Type: Technology
Sponsor: U.S. Air Force
Launch: 13 April 1975 at 0h51 UTC, from Vandenberg Air Force Base's SLC-3W, by an Atlas F (Atlas 71F / Star-17A).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Molniya 3-2
Spacecraft:  Molniya-3 No. 12
Numbers: 1975 payload #40 ; 1975-029A ; 2108th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 14 April 1975 at 17h53 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 727
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #41 ; 1975-030A ; 2109th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 16 April 1975 at 8h09 UTC, from Baykonur Cosmodrome's  LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 728
Spacecraft:  Zenit-2M
Numbers: 1975 payload #42 ; 1975-031A ; 2110th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 18 April 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Nauka
Spacecraft:  [Nauka #20]
Numbers: 1975 payload #43 ; 1975-031G ; s2111th pacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 18 April 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Titan Samos 44 / KH-8 44 GAMBIT
Spacecraft:  OPS 4883
Numbers: 1975 payload #44 ; 1975-032A ; 2112th spacecraft.
Type: Reconnaissance
Sponsor: U.S. National Reconnaissance Office
Launch: 18 April 1975 at 16h48 UTC, from Vandenberg Air Force Base's SLC-4W, by a Titan 3B (3B-48 (24B-14) / Agena D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Aryabhata
Spacecraft: 
Numbers: 1975 payload #45 ; 1975-033A ; 2113th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: India' ISRO
Launch: 19 April 1975 at 7h40 UTC, from Kapustin Yar Cosmodrome's LC-107, by a Kosmos C-1 (11K65M 53731-279).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 729
Spacecraft:  Tsiklon
Numbers: 1975 payload #46 ; 1975-034A ; 2114th spacecraft.
Type: Navigation
Sponsor: Soviet Union's Defense ministry
Launch: 23 April 1975 at 21h07 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53731-274).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 730
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #47 ; 1975-035A ; 2115th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 24 April 1975 at 8h09 UTC, from Plesetsk Cosmodrome's LC-43/4, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 1-29
Spacecraft: 
Numbers: 1975 payload #48 ; 1975-036A ; 2116th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 29 April 1975 at 10h33 UTC, from Plesetsk Cosmodrome's LC41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer 53 / SAS 3
Spacecraft:  SAS C
Numbers: 1975 payload #49 ; 1975-037A ; 2117th spacecraft.
Type: Solar observatory
Sponsor: NASA
Launch: 7 May 1975 at 22h45 UTC, from San Marco platform, by a Scout F-1 (S194C).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Anik 3 / Telesat C
Spacecraft:  Anik A-3
Numbers: 1975 payload #50 ; 1975-038A ; 2118th spacecraft.
Type: Communications
Sponsor: Telesat Canada
Launch: 7 May 1975 at 23h35 UTC, from Cape Canaveral's LC-17B, by a Delta 2914 (Delta 2914 596 / Delta 110).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
D5-A Pollux
Spacecraft: 
Numbers: 1975 payload #51 ; 1975-039A ; 2119th spacecraft.
Type: Technology
Sponsor: France's CNES
Launch: 17 May 1975 at 10h32 UTC, from Kourou Space Center's ELD, by a Diamant BP-4 (No. 2).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
D5-B Castor
Spacecraft: 
Numbers: 1975 payload #52 ; 1975-039B ; 2120th spacecraft.
Type: Technology
Sponsor: France's CNES
Launch: 17 May 1975 at 10h32 UTC, from Kourou Space Center's ELD, by a Diamant BP-4 (No. 2).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
DSCS 2-5 
Spacecraft:  OPS 9434 / DSCS II F-5 / DSCS II B-5
Defense Satellite Communications System
Numbers: 1975 payload #53 ; 1975-040A ; 2121st spacecraft.
Type: Communications
Sponsor: U.S. Air Force
Launch: 20 May 1975 at 14h03 UTC, from Cape Canaveral's LC-40, by aTitan 3C (23C-7 / Transtage-25).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ; Jonathan Space Report No. 495 ;
.
DSCS 2-6
Spacecraft:  OPS 9435 / DSCS II F-6 / DSCS II B-6
Defense Satellite Communications System
Numbers: 1975 payload #54 ; 1975-040B ; 2122nd spacecraft.
Type: Communications
Sponsor: U.S. Air Force
Launch: 20 May 1975 at 14h03 UTC, from Cape Canaveral's LC-40, by aTitan 3C (23C-7 / Transtage-25).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ; Jonathan Space Report No. 495 ;
.
Kosmos 731
Spacecraft:  Zenit-2M
Numbers: 1975 payload #55 ; 1975-041A ; 2123rd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 21 May 1975 at 6h57 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #21]
Numbers: 1975 payload #56 ; 1975-041B ; 2124th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 21 May 1975 at 6h57 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Intelsat 4H
Spacecraft:  Intelsat IV F1
Numbers: 1975 payload #57 ; 1975-042A ; 2125th spacecraft.
Type: Communications
Sponsor: Intelsat
Launch: 22 May 1975 at 22h04 UTC, from Cape Canaveral's LC-36A, by an Atlas-Centaur (Atlas SLV-3D AC-35 / Centaur D-1AR 5018D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Block 5C (#3) / DMSP Block-5C F2
Spacecraft:  DMSP 10533 / DMSP 5C F-2
Numbers: 1975 payload #58 ; 1975-043A ; 2126th spacecraft.
Type: Meteorology
Sponsor: U.S. Air Force
Launch: 24 May 1975 at 3h22 UTC, from Vandenberg Air Force Base's SLC-10W, by a Thor-Burner 2A (197).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Soyuz 18
Spacecraft:  Soyuz 7K-T No. 40
Numbers: 1975 payload #59 ; 1975-044A ; 2127th spacecraft.
Type: Piloted spacecraft
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 24 May 1975 at 14h58 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 732
Spacecraft:  Strela-1M
Numbers: 1975 payload #60 ; 1975-045A ; 2128th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 733
Spacecraft:  Strela-1M
Numbers: 1975 payload #61 ; 1975-045B ; 2129th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 734
Spacecraft:  Strela-1M
Numbers: 1975 payload #62 ; 1975-045C ; 2130th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 735
Spacecraft:  Strela-1M
Numbers: 1975 payload #63 ; 1975-045D ; 2131st spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 736
Spacecraft:  Strela-1M
Numbers: 1975 payload #64 ; 1975-045E ; 2132nd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 737
Spacecraft:  Strela-1M
Numbers: 1975 payload #65 ; 1975-045F ; 2133rd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 738
Spacecraft:  Strela-1M
Numbers: 1975 payload #66 ; 1975-045G ; 2134th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 739
Spacecraft:  Strela-1M
Numbers: 1975 payload #67 ; 1975-045H ; 2135th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 740
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #68 ; 1975-046A ; 2136th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 7h40 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 741
Spacecraft:  Gektor-Priroda
Numbers: 1975 payload #69 ; 1975-047A ; 2137th spacecraft.
Type: Earth remote sensing
Sponsor: Soviet Union
Launch: 30 May 1975 at 9h45 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Intercosmos
Spacecraft:  DS-U3-IK No. 5
Numbers: 1975 payload #70 ; 1975 4th loss ; 2138th spacecraft.
Type: Earth/space studies
Sponsor: Soviet Union + East European countries
Launch: 3 June 1975 at 9h00 UTC, from Kapustin Yar Cosmodrome's LC-107/, by a Kosmos C-1 (11K65M 53721-257).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 742
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #71 ; 1975-048A ; 2139th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 3 June 1975 at 13h26 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 1-30
Spacecraft:  Molniya-1 No. 24
Numbers: 1975 payload #72 ; 1975-049A ; 2140th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 5 June 1975 at 1h40 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
SRET 2
Spacecraft: 
Numbers: 1975 payload #73 ; 1975-049B ; 2141st spacecraft.
Type: Technology
Sponsor: France's CNES
Launch: 5 June 1975 at 1h40 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Venera 9
Spacecraft:  4V-1 No. 660
Numbers: 1975 payload #74 ; 1975-050A ; 2142nd spacecraft.
Type: Venus probe
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 8 June 1975 at 2h38 UTC, from Baykonur Cosmodrome's LC-81P, by a D-1-e/Proton-K/D (8K82K 286-01 / 11S824).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Big Bird 10 / KH-9 10 HEXAGON
Spacecraft:  OPS 6381
Numbers: 1975 payload #75 ; 1975-051A ; 2143rd spacecraft.
Type: Reconnaissance
Sponsor: U.S. National Reconnaissance Office
Launch: 8 June 1975 at 18h30 UTC, from Vandenberg Air Force Base's SLC-4E, by a Titan 3D (23D-10).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
SSU 1
Spacecraft:  SSF-C No. 5
Numbers: 1975 payload #76 ; 1975-051C ; 2144th spacecraft.
Type: Electronic intelligence
Sponsor: U.S. Navy
Launch: 8 June 1975 at 18h30 UTC, from Vandenberg Air Force Base's SLC-4E, by a Titan 3D (23D-10).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nimbus 6
Spacecraft:  Nimbus F
Numbers: 1975 payload #77 ; 1975-052A ; 2145th spacecraft.
Type: Meteorology
Sponsor: NASA
Launch: 12 June 1975 at 8h12 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2914 (Delta 2910 595 / Delta 111).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 743
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #78 ; 1975-053A ; 2146th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 12 June 1975 at 12h28 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Venera 10
Spacecraft:  4V-1 No. 661
Numbers: 1975 payload #79 ; 1975-054A ; 2147th spacecraft.
Type: Venus probe
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 14 June 1975 at 3h00 UTC, from Baykonur Cosmodrome's LC-81P, by a D-1-e/Proton-K/D (8K82K 285-02 / 11S824).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
CANYON 6
Spacecraft: Program 827's AFP-827 F6 (7506)
Numbers: 1975 payload #80 ; 1975-055A ; 2148th spacecraft.
Type: Electronic intelligence
Sponsor: United States' NRO / National Reconnaissance Office
Launch: 18 June 1975 at 10h00 UTC, from Cape Canaveral's LC-13, by an Atlas-Agena D (Atlas SLV-3A 5506A / Agena D A 2806).
Orbit: Geostationary
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ; Jonathan Space Report No. 501 ;
.
Kosmos 744
Spacecraft:  Tselina-D
Numbers: 1975 payload #81 ; 1975-056A ; 2149th spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 20 June 1975 at 6h57 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
OSO 8
Spacecraft:  OSO I
Numbers: 1975 payload #82 ; 1975-057A ; 2150th spacecraft.
Type: Solar observatory
Sponsor: NASA
Launch: 21 June 1975 at 11h43 UTC, from Cape Canaveral's LC-17B, by a Delta 1914 (Delta 1910 586 / Delta 112).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 745
Spacecraft:  DS-P1-Yu No. 76
Numbers: 1975 payload #83 ; 1975-058A ; 2151st spacecraft.
Type: Military technologies
Sponsor: Soviet Union's Defense ministry
Launch: 24 June 1975 at 12h05 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 746
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #84 ; 1975-059A ; 2152nd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 25 June 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 747
Spacecraft:  Zenit-2M
Numbers: 1975 payload #85 ; 1975-060A ; 2153rd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 27 June 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #22]
Numbers: 1975 payload #86 ; 1975-060F ; 2154th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 27 June 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Kosmos 748
Spacecraft: Zenit-4MK
Numbers: 1975 payload #87 ; 1975-061A ; 2155th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 3 July 1975 at 13h40 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 749
Spacecraft:  Tselina-O
Numbers: 1975 payload #88 ; 1975-062A ; 2156th spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 4 July 1975 at 0h57 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-259).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 2-13
Spacecraft: 
Numbers: 1975 payload #89 ; 1975-063A ; 2157th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 8 July 1975 at 5h02 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Meteor 2-4
Spacecraft: 
Numbers: 1975 payload #90 ; 1975-064A ; 2158th spacecraft.
Type: Meteorology
Sponsor: Soviet Union
Launch: 11 July 1975 at 4h19 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Soyuz 19
Spacecraft:  Soyuz 7K-TM No. 75 (EPSA)
Numbers: 1975 payload #91 ; 1975-065A ; 2159th spacecraft.
Type: Piloted spacecraft
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 15 July 1975 at 12h20 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Apollo ASTP
Spacecraft: Apollo CM-111 / DM-2 (Docking Module 2)
Apollo-Soyuz Test Project
Numbers: 1975 payload #92 ; 1975-066A ; 2160th spacecraft.
Type: Piloted spacecraft
Sponsor: NASA
Launch: 15 July 1975 at 19h50 UTC, from Cape Canaveral's LC-39B, by a Saturn IB (SA-210).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 750
Spacecraft:  DS-P1-I No. 15
Numbers: 1975 payload #93 ; 1975-067A ; 2161st spacecraft.
Type: Antimissile technologies
Sponsor: Soviet Union's Defense ministry
Launch: 17 July 1975 at 9h10 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 751
Spacecraft:  Zenit-2M
Numbers: 1975 payload #94 ; 1975-068A ; 2162nd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 23 July 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 752
Spacecraft:  Vektor
Numbers: 1975 payload #95 ; 1975-069A ; 2163rd spacecraft.
Type: Radar calibration
Sponsor: Soviet Union's Defense ministry
Launch: 24 July 1975 at 18h57 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-254).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
JSSW 3 ("Chinasat 3")
Spacecraft:  Ji Shu Shiyan Weixing / Shuang Cheng Tzu 
Numbers: 1975 payload #96 ; 1975-070A ; 2164th spacecraft.
Type: Electronic intelligence
Sponsor: China
Launch: 26 July 1975 at 13h28 UTC, from Jiuquan's LA-2B, by a Feng Bao 1 (FB 1-4).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 753
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #97 ; 1975-071A ; 2165th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 31 July 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
COS B
Spacecraft: 
Numbers: 1975 payload #98 ; 1975-072A ; 2166th spacecraft.
Type: Technology
Sponsor: ESA / European Space Agency (CERS/ESRO)
Launch: 9 August 1975 at 1h48 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2914 (Delta 2913 602 / Delta 113).
Orbit:
Decayed: 18 January 1986
Mission: Eighth CERS/ESRO satellite, first European Space Agency satellite.
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log; Spacewarn No. 550 ;
.
Kosmos 754
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #99 ; 1975-073A ; 2167th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 13 August 1975 at 7h26 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 755
Spacecraft:  Parus
Numbers: 1975 payload #100 ; 1975-074A ; 2168th spacecraft.
Type: Navigation
Sponsor: Soviet Union's Defense ministry
Launch: 14 August 1975 at 13h26 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53731-288).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Viking 1 Orbiter
Spacecraft: 
Numbers: 1975 payload #101 ; 1975-075A ; 2169th spacecraft.
Type: Mars probe
Sponsor: NASA
Launch: 20 August 1975 at 21h22 UTC, from Cape Canaveral's LC-41, by a Titan-3E/Centeru (Titan 3E TC-4 / Centaur D-1T E-4).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Viking 1 Lander (Mutch Memorial Station)
Spacecraft: 
Numbers: 1975 payload #102 ; 1975-075C ; 2170th spacecraft.
Type: Mars probe
Sponsor: NASA

Source: NASA
Launch: 20 August 1975 at 21h22 UTC, from Cape Canaveral's LC-41, by a Titan-3E/Centeru (Titan 3E TC-4 / Centaur D-1T E-4).
Orbit:
Decayed:
Mission: At right, the Viking Lander 1 landing site photographed in 2006 by the Mars Reconnaissance Orbiter (see more). 
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 756
Spacecraft:  Tselina-D
Numbers: 1975 payload #103 ; 1975-076A ; 2171st spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 22 August 1975 at 2h09 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Symphonie 2
Spacecraft:  Symphonie MV2
Numbers: 1975 payload #104 ; 1975-077A ; 2172nd spacecraft.
Type: Communications
Sponsor: France-Germany
Launch: 26 August 1975 at 1h42 UTC, from Cape Canaveral's LC-17A, by a Delta 2914 (Delta 2914 594 / Delta 114).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 757
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #105 ; 1975-078A ; 2173rd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 27 August 1975 at 14h52 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 1-31
Spacecraft: 
Numbers: 1975 payload #106 ; 1975-079A ; 2174th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 2 September 1975 at 13h12 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 758
Spacecraft:  Yantar'-2K No. 3
Numbers: 1975 payload #107 ; 1975-080A ; 2175th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 5 September 1975 at 14h52 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 2-14
Spacecraft: 
Numbers: 1975 payload #108 ; 1975-081A ; 2176th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 9 September 1975 at 0h28 UTC, from Plesetsk Cosmodroem's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
ETS 1 / Kiku-1
Spacecraft: 
Numbers: 1975 payload #109 ; 1975-082A ; 2177th spacecraft.
Type: Technology
Sponsor: Japan's NASDA
Launch: 9 September 1975 at 5h30 UTC, from Tanegashima Space Center's O, by a N-1 (N-1(F)).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Viking 2 Orbiter
Spacecraft: 
Numbers: 1975 payload #110 ; 1975-083A ; 2178th spacecraft.
Type: Mars probe
Sponsor: NASA
Launch: 9 September 1975 at 18h39 UTC, from Cape Canaveral's LC-41, by a Titan 3E/Centaur (TC-3 / Centaur D-1T E-3).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Viking 2 Lander
Spacecraft: 
Numbers: 1975 payload #111 ; 1975-083C ; 2179th spacecraft.
Type: Mars probe
Sponsor: NASA
Launch: 9 September 1975 at 18h39 UTC, from Cape Canaveral's LC-41, by a Titan 3E/Centaur (TC-3 / Centaur D-1T E-3).
Orbit:
Decayed:
Mission: At right, the Viking Lander 2 landing site photographed in 2006 by the Mars Reconnaissance Orbiter (see more). 
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 759
Spacecraft:  Zenit-4MT (Orion)
Numbers: 1975 payload #112 ; 1975-084A ; 2180th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 12 September 1975 at 5h31 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 760
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #113 ; 1975-085A ; 2181st spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 16 September 1975 at 9h07 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 761
Spacecraft:  Strela-1M
Numbers: 1975 payload #114 ; 1975-086A ; 2182nd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 762
Spacecraft:  Strela-1M
Numbers: 1975 payload #115 ; 1975-086B ; 2183rd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 763
Spacecraft:  Strela-1M
Numbers: 1975 payload #116 ; 1975-086C ; 2184th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 764
Spacecraft:  Strela-1M
Numbers: 1975 payload #117 ; 1975-086D ; 2185th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 765
Spacecraft:  Strela-1M
Numbers: 1975 payload #118 ; 1975-086E ; 2186th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 766
Spacecraft:  Strela-1M
Numbers: 1975 payload #119 ; 1975-086F ; 2187th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 767
Spacecraft:  Strela-1M
Numbers: 1975 payload #120 ; 1975-086G ; 2188th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 768
Spacecraft:  Strela-1M
Numbers: 1975 payload #121 ; 1975-086H ; 2189th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Meteor 1-22
Spacecraft:  Meteor-MV
Numbers: 1975 payload #122 ; 1975-087A ; 2190th spacecraft.
Type: Meteorology
Sponsor: Soviet Union
Launch: 18 September 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 769
Spacecraft:  Zenit-2M
Numbers: 1975 payload #123 ; 1975-088A ; 2191st spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 23 September 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 770
Spacecraft:  Sfera
Numbers: 1975 payload #124 ; 1975-089A ; 2192nd spacecraft.
Type: Geodesy
Sponsor: Soviet Union
Launch: 24 September 1975 at 12h00 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-260).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 771
Spacecraft:  Zenit-4MKT / Fram
Numbers: 1975 payload #125 ; 1975-090A ; 2193rd spacecraft.
Type: Reconnaissance/Earth remote sensing
Sponsor: Soviet Union's Defense ministry
Launch: 25 September 1975 at 9h50 UTC, from Plesetsk Cosmodrome's LC-43/4, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Intelsat 4A F-1
Spacecraft:  Intelsat IVA F1
Numbers: 1975 payload #126 ; 1975-091A ; 2194th spacecraft.
Type: Communications
Sponsor: Intelsat
Launch: 26 September 1975 at 0h17 UTC, from Cape Canaveral's LC-36B, by an Atlas-Centaur (Atlas SLV-3D(R) AC-36 / Centaur D-1AR 5016).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
D-2B Aura
Spacecraft: 
Numbers: 1975 payload #127 ; 1975-092A ; 2195th spacecraft.
Type: Astronomy
Sponsor: France's CNES
Launch: 27 September 1975 at 8h37 UTC, from Kourou Space Center's ELD, by a Diamant BP.4 (No. 3).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 772 (Soyuz)
Spacecraft:  Soyuz 7K-S No. 2L
Numbers: 1975 payload #128 ; 1975-093A ; 2196th spacecraft.
Type: Piloted spacecraft test
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 29 September 1975 at 4h18 UTC, from Baykonur Cosmodrome's LC-1/LC-31?, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 773
Spacecraft:  Strela-2
Numbers: 1975 payload #129 ; 1975-094A ; 2197th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 30 September 1975 at 18h43 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-258).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 774
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #130 ; 1975-095A ; 2198th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 1st October 1975 at 8h38 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer 54 / AE-D
Spacecraft:  Atmospheric Explorer D
Numbers: 1975 payload #131 ; 1975-096A ; 2199th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: NASA
Launch: 6 October 1975 at 9h00 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2914 (Delta 2910 600 / Delta 115).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 775
Spacecraft:  Oko? / SPRN No. 1
Numbers: 1975 payload #132 ; 1975-097A ; 2200th spacecraft.
Type: Missible early warning
Sponsor: Soviet Union's Defense ministry
Launch: 8 October 1975 at 0h30 UTC, from Baykonur Cosmodrome's LC-81L, by a D-1-e/Proton-K/DM (8K82K 286-02 / 11S86).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Titan Samos 45 / KH-8 45 GAMBIT
Spacecraft:  OPS 5499
Numbers: 1975 payload #133 ; 1975-098A ; 2201st spacecraft.
Type: Reconnaissance
Sponsor: U.S. National Reconnaissance Office
Launch: 9 October 1975 at 19h15 UTC, from Vandenberg Air Force Base's SLC-4W, by a Titan 3B (3B-47 (24B-13) / Agena D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
TIP 2 / Triad 2
Spacecraft: 
Numbers: 1975 payload #134 ; 1975-099A ; 2202nd spacecraft.
Type: Navigation
Sponsor: U.S. Navy
Launch: 12 October 1975 at 6h39 UTC, from Vandenberg Air Force Base's SLC-5, by a Scout D-1 (S195C).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Luna
Spacecraft:  E-8-5M No. 412
Numbers: 1975 payload #135 ; 1975 5th loss ; 2203rd spacecraft.
Type: Lunar probe
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 16 October 1975 at 4h04 UTC, from Baykonur Cosmodrome's LC-81L, by a D-1-e/Proton-K/D (8K82K 287-02 / 11S824).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
GOES 1 / SMS 3
Spacecraft:  Geostationary Operational Environmental Satellite
Numbers: 1975 payload #136 ; 1975-100A ; 2204th spacecraft.
Type: Meteorology
Sponsor: NASA
Launch: 16 October 1975 at 22h40 UTC, from Cape Canaveral's LC-17B, by a Delta 2914 (Delta 2914 597 / Delta 116).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 776
Spacecraft:  Zenit-2M
Numbers: 1975 payload #137 ; 1975-101A ; 2205th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 17 October 1975 at 14h38 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #23]
Numbers: 1975 payload #138 ; 1975-101A ; 2206th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 17 October 1975 at 14h38 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Kosmos 777
Spacecraft:  US-P
Numbers: 1975 payload #139 ; 1975-102A ; 2207th spacecraft.
Type: Ocean surveillance ("RORSAT")
Sponsor: Soviet Union's Defense ministry
Launch: 29 October 1975 at 11h02 UTC, from Baykonur Cosmodrome's LC-90, by a F-1/Tsyklon 2.
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 778
Spacecraft:  Parus
Numbers: 1975 payload #140 ; 1975-103A ; 2208th spacecraft.
Type: Navigation
Sponsor: Soviet Union's Defense ministry
Launch: 4 November 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53731-275).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 779
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #141 ; 1975-104A ; 2209th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 4 November 1975 at 15h21 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 3-3
Spacecraft:  Molniya-3 No. 13
Numbers: 1975 payload #142 ; 1975-105A ; 2210th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 14 November 1975 at 19h14 UTC, from Plesetsk Cosmdrome's LC-43/3, by an A-2-e/"Molniya" ().
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Soyuz 20
Spacecraft:  Soyuz 7K-T(A9) No. 64
Numbers: 1975 payload #143 ; 1975-106A ; 2211st spacecraft.
Type: Piloted spacecraft test
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 17 November 1975 at 14h37 UTC, from Baykonur Cosmodrome's LC-1/LC-31?, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer 55 / AE-E
Spacecraft:  Atmospheric Explorer-E
Numbers: 1975 payload #144 ; 1975-107A ; 2212th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: NASA
Launch: 20 November 1975 at 2h06 UTC, from Cape Canaveral's LC-17B, by a Delta 2914 (Delta 2910 604 / Delta 117).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 780
Spacecraft:  Zenit-2M
Numbers: 1975 payload #145 ; 1975-108A ; 2213th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 21 November 1975 at 9h21 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #24]
Numbers: 1975 payload #146 ; 1975-108D ; 2214th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 21 November 1975 at 9h21 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Kosmos 781
Spacecraft:  Tselina-O
Numbers: 1975 payload #147 ; 1975-109A ; 2215th spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 21 November 1975 at 17h16 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53731-271).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 782
Spacecraft: Bion No. 3
Numbers: 1975 payload #148 ; 1975-110A ; 2216th spacecraft.
Type: Biology
Sponsor: Soviet Union
Launch: 25 November 1975 at 17h00 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
FSW 1-01 ("Chinasat 4")
Spacecraft:  Fanhui Shi Weixing-1 No. 1
Numbers: 1975 payload #149 ; 1975-111A ; 2217th spacecraft.
Type: Reconnaissance
Sponsor: China
Launch: 26 November 1975 at 3h29 UTC, from Jiuquan's LA-2B, by a Chang Zheng 2C (CZ-2C-1).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 783
Spacecraft:  Strela-2
Numbers: 1975 payload #150 ; 1975-112A ; 2218th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 November 1975 at 0h14 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-252).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 784
Spacecraft:  Zenit-2M
Numbers: 1975 payload #151 ; 1975-113A ; 2219th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 3 December 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #25]
Numbers: 1975 payload #152 ; 1975-113G ; 2220th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 3 December 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Big Bird 11 / KH-9 11 HEXAGON
Spacecraft:  OPS 4428
Numbers: 1975 payload #153 ; 1975-114A ; 2221st spacecraft.
Type: Reconnaissance
Sponsor: U.S. National Reconnaissance Office
Launch: 4 December 1975 at 20h38 UTC, from Vandenberg Air Force Base's SLC-4E, by a Titan 3D (23D-13).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Hitchhiker 38
Spacecraft:  S3-2 / SSF 9
Numbers: 1975 payload #154 ; 1975-114B ; 2222nd spacecraft.
Type: Electronic intelligence
Sponsor: U.S. Air Force
Launch: 4 December 1975 at 20h38 UTC, from Vandenberg Air Force Base's SLC-4E, by a Titan 3D (23D-13).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer / DAD-A
Spacecraft:  Dual Air Density-A
Numbers: 1975 payload #155 ; 1975 6th loss ; 2223rd spacecraft.
Type: Earth upper atmosphere studies
Sponsor: NASA
Launch: 6 December 1975 at 3h35 UTC, from Vandenberg Air Force Base's SLC-5, by a Scout F-1 (S196C).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer / DAD-B
Spacecraft:  Dual Air Density-B
Numbers: 1975 payload #156 ; 1975 7th loss ; 2224th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: NASA
Launch: 6 December 1975 at 3h35 UTC, from Vandenberg Air Force Base's SLC-5, by a Scout F-1 (S196C).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Intercosmos 14
Spacecraft:  DS-U2-IK No. 6
Numbers: 1975 payload #157 ; 1975-115A ; 2225th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: Soviet Union + East European countries
Launch: 11 December 1975 at 17h00 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-308).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 785
Spacecraft:  US-A
Numbers: 1975 payload #158 ; 1975-116A ; 2226th spacecraft.
Type: Ocean surveillance ("RORSAT")
Sponsor: Soviet Union's Defense ministry
Launch: 12 December 1975 at 12h43 UTC, from Baykonur Cosmodrome's LC-90, by a F-1/Tsyklon 2.
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
RCA Satcom 1
Spacecraft:  RCA-A
Numbers: 1975 payload #159 ; 1975-117A ; 2227th spacecraft.
Type: Communications
Sponsor: RCA Communications
Launch: 13 December 1975 at 1h56 UTC, from Cape Canaveral's LC-17A, by a Delta 3914 (Delta 3914 607 / Delta 118).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
IMEWS 5 / DSP 8
Spacecraft:  DSP F5
Numbers: 1975 payload #160 ; 1975-118A ; 2228th spacecraft.
Type: Missile early warning
Sponsor: U.S. Air Force
Launch: 14 December 1975 at 5h15 UTC, from Cape Canaveral's LC-40, by a Titan 3C (23C-11).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ; DSP, A Pictorial ;
.
JSSW 4 ("Chinasat 5")
Spacecraft:  Ji Shu Shiyan Weixing
Numbers: 1975 payload #161 ; 1975-119A ; 2229th spacecraft.
Type: Electronic intelligence
Sponsor: China
Launch: 16 December 1975 at 9h19 UTC, from Jiuquan LA-2B, by a Feng Bao 1 (FB 1-5).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 786
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #162 ; 1975-120A ; 2230th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 16 December 1975 at 9h50 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 2-15
Spacecraft: 
Numbers: 1975 payload #163 ; 1975-121A ; 2231st spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 17 December 1975 at 11h16 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos
Spacecraft:  I2P (Lira)
Numbers: 1975 payload #164 ; 1975 8th loss ; 2232nd spacecraft.
Type: Antisatellite technologies
Sponsor: Soviet Union's Defense ministry
Launch: 19 December 1975, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-263).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Prognoz 4
Spacecraft:  SO-M No. 504
Numbers: 1975 payload #165 ; 1975-122A ; 2233rd spacecraft.
Type: Earth upper atmosphere studies
Sponsor: Soviet Union
Launch: 22 December 1975 at 2h09 UTC, from Baykonur Cosmodrome's LC-31, by an A-2-e/"Molniya" (8K78M / SOL).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Raduga 1
Spacecraft:  Gran' No. 11L (Statsionar-1)
Numbers: 1975 payload #166 ; 1975-123A ; 2234th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 22 December 1975 at 13h00 UTC, from Baykonur Cosmodrome's LC-81P, by a D-1-e/Proton-K/DM (8K82K 288-01 / 11S86 3L).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Meteor 1-23
Spacecraft:  Meteor-MV
Numbers: 1975 payload #167 ; 1975-124A ; 2235th spacecraft.
Type: Meteorology
Sponsor: Soviet Union
Launch: 25 December 1975 at 18h57 UTC, from Plesetsk Cosmodrome, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 3-4
Spacecraft:  Molniya-3 No. 15
Numbers: 1975 payload #168 ; 1975-125A ; 2236th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 27 December 1975 at 10h22 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
© Claude Lafleur, 2004-10 Mes sites web: claudelafleur.qc.ca