Mission type | Test flight |
---|---|
Operator | Soviet space program |
COSPAR ID | 1975-106A |
SATCAT no. | 08430 |
Mission duration | 90 days 11 hours 47 minutes |
Orbits completed | 1470 |
Spacecraft properties | |
Spacecraft | Soyuz 7K-T No.8 |
Spacecraft type | Soyuz 7K-T/A9 |
Manufacturer | NPO Energia |
Launch mass | 6570 kg [1] |
Landing mass | 2800 kg |
Dimensions | 7.13 m long 2.72 m wide |
Start of mission | |
Launch date | 17 November 1975, 14:36:37 UTC |
Rocket | Soyuz-U |
Launch site | Baikonur, Site 1/5[2] |
End of mission | |
Landing date | 16 February 1976, 02:24 UTC |
Landing site | 56 km at the southwest of Arkalyk, Kazakhstan |
Orbital parameters | |
Reference system | Geocentric orbit[3] |
Regime | Low Earth orbit |
Perigee altitude | 199.7 km |
Apogee altitude | 263.5 km |
Inclination | 51.6° |
Period | 88.8 minutes |
Docking with Salyut 4 | |
Soyuz 20 (Russian: Союз 20, Union 20) was an uncrewed spacecraft launched by the Soviet Union. It was a long-duration test of the Soyuz spacecraft that docked with the Salyut 4 space station. Soyuz 20 performed comprehensive checking of improved on-board systems of the spacecraft under various flight conditions. It also carried a biological payload. Living organisms were exposed to three months in space.
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