Soyuz 20

Infobox Space mission
mission_name = Soyuz 20
sign = ?
crew_members = 0
launch = November 17, 1975
14:38:00 UTC
Gagarin's Start
landing = February 16, 1976
02:24:00 UTC
56 kilometres south-west of Arkalyk
duration = 90d/11:46
orbits = 1470
next = Soyuz 21
previous = Apollo-Soyuz Test Project |

Crew

None

Mission parameters

*Mass: 6570 kg (14,480 lb)
*Perigee: 177 km (110 mi)
*Apogee: 251 km (156 mi)
*Inclination: 51.6°
*Period: 89.1 minutes

Soyuz 20 was an unmanned spacecraft launched by the USSR. It was a long duration test of the Soyuz transport vehicle that docked with the Salyut 4 space station. It was recovered on February 16, 1976 2:24 GMT. 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.