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Soviet Space ProgramSoyuz U1/5, Baikonur Cosmodrome, Republic of Kazakhstan
Soyuz 20
Launched
November 17, 1975 · 14:36 UTC
Summary
Soyuz 20 launched on a Soviet Space Program Soyuz U from 1/5, Baikonur Cosmodrome, Republic of Kazakhstan on November 17, 1975 at 14:36 UTC. It was Soviet Space Program's 965th launch, 79th this year and humanity's 1,762nd orbital launch attempt. It was the 22nd Soyuz U flight and the 9th this year. The payload was bound for low Earth orbit (LEO). Soyuz-20, one of 2 catalogued objects, reached a 185 × 258 km orbit inclined 51.6°. The spacecraft was Soyuz 20 (Soyuz 7K-T 11F615A9 #64). 2 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Booster
- No booster details on record.
- Mission
- Test Flight · Low Earth Orbit (LEO)
- Milestone
- 22nd Soyuz U flight · 9th this yearSoviet Space Program's 965th launch79th this yearhumanity's 1,762nd orbital launch attempt111th orbital launch attempt this year
Spacecraft
Soyuz 20 (Soyuz 7K-T 11F615A9 #64)
Soyuz 20 (Russian: Союз 20, Union 20) was an unmanned 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. It was reentered on 16 February 1976.
- Destination: Salyut 4
- Mission length: 90 days
- Docked November 19, 1975 at Salyut-4 forward
The Soyuz spacecraft safely landed in Kazakhstan.
Flight preview
Orbit: as tracked
Soyuz-20 · NORAD 8430 · 1975-106 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 1975-106A
- Epoch
- 1975-11-17 18:51:33 UTC
- Mean motion
- 16.21852577 rev/day
- Eccentricity
- 0.0055769
- Inclination
- 51.6165°
- Ascending node
- 284.1642°
- Arg. of perigee
- 133.1194°
- Mean anomaly
- 227.4467°
- Element set
- 999
- Rev at epoch
- 3
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO. Ascent drawn from padside's representative profile.
Catalogued objects
2 catalogued: 1 payload, 1 rocket stage
- Soyuz-20 · NORAD 8430 · docked November 19, 1975
Soyuz-U No. 015 Blok-I · re-entered November 20, 1975
Data from J. McDowell, planet4589.org
About this launch
Soyuz 20 was an uncrewed Soyuz that docked with Salyut 4 for a 90-day mission to qualify modifications extending the ferry's orbital life to three months. It also carried tortoises and other biological specimens for long-duration exposure.
Pad
1/5, Baikonur Cosmodrome, Republic of Kazakhstan
151st launch from 1/5, 6th this year · 438th from Baikonur Cosmodrome, Republic of Kazakhstan
Local pad time at liftoff: Nov 17, 7:36 PM GMT+5, at night
487 launches from this pad · 1,565 from Baikonur Cosmodrome, Republic of Kazakhstan
49 days after the previous launch from this pad
All launches from Baikonur Cosmodrome, Republic of KazakhstanOpen in maps
Questions
When did Soyuz 20 launch?
Soyuz 20 launched on November 17, 1975 at 14:36 UTC.
Where can I watch Soyuz 20?
No webcast is on record for this launch.
What rocket launched Soyuz 20?
Soyuz U, flown by Soviet Space Program. Soyuz U spec sheet
Where did Soyuz 20 launch from?
1/5, Baikonur Cosmodrome, Republic of Kazakhstan. Liftoff was Nov 17, 7:36 PM GMT+5 local time at the pad.
What orbit did Soyuz 20 reach?
Soyuz-20, one of 2 catalogued objects, reached a 185 × 258 km orbit inclined 51.6°.
Which program is Soyuz 20 part of?
Soyuz. About Soyuz