Soyuz T-4
Soyuz T-4
| Mission Statistics
|
| Mission Name: | Soyuz T-4
|
| Call Sign: | Photon
|
| Number of Crew Members: | 2
|
| Launch: | March 12, 1981
19:00:11 UTC
Baikonur LC1
|
| Landing: | May 26, 1981
12:37:34 UTC
125 km E Dzhezkazgan
|
| Duration: | 74 days 17 hours 37 minutes 23 seconds
|
| Number of Orbits: | 1178
|
Crew
Mission Parameters
- Mass: 6850 kg
- Perigee: 201 km
- Apogee: 250 km
- Inclination: 51.6°
- Period: 88.7 minutes
Mission Highlights
14th expedition to Salyut 6.
Docking with Salyut 6 delayed after the onboard Argon computer determined it
would occur outside of radio range with the TsUP. In mid-May, Kovalyonok
and Savinykh replaced the Soyuz-T 4 probe with a Salyut drogue. This may
have been an experiment to see if a Soyuz-T docked to a space station could
act as a rescue vehicle in the event that an approaching Soyuz-T equipped with
a probe experienced docking difficulties and could not return to Earth.
