Soyuz 20
1975 Soviet uncrewed spaceflight to Salyut 4 From Wikipedia, the free encyclopedia
1975 Soviet uncrewed spaceflight to Salyut 4 From Wikipedia, the free encyclopedia
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. The primary goal of the mission was to test hardware modifications to the Soyuz 7K-T spacecraft that would extend its operating life from two to three months in preparation for long-duration Salyut crew residencies.
Mission type | Orbital test flight |
---|---|
Operator | Soviet space program |
COSPAR ID | 1975-106A |
SATCAT no. | 8430 |
Mission duration | 90 days, 11 hours and 47 minutes |
Orbits completed | 1470 |
Spacecraft properties | |
Spacecraft | Soyuz 7K-T No.8 |
Spacecraft type | Soyuz 7K-T/A9 |
Manufacturer | NPO Energia |
Launch mass | 6,570 kg (14,480 lb)[1] |
Landing mass | 2,800 kg (6,200 lb) |
Start of mission | |
Launch date | 17 November 1975, 14:36:37 UTC |
Rocket | Soyuz-U |
Launch site | Baikonur 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 (124.1 mi) |
Apogee altitude | 263.5 km (163.7 mi) |
Inclination | 51.6° |
Period | 88.8 minutes |
Docking with Salyut 4[4][5] | |
Docking date | 19 November 1975, 16:19 UTC |
Undocking date | 16 February 1976, 23:07 UTC |
Time docked | 89 days, 6 hours and 48 minutes |
It was recovered on 16 February 1976 at 02:24 UTC.[1]
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.