Soyuz 20

USSR



Launch & orbit data:

Designation 08430 / 75106A
Launch date - time 17 Nov 1975 - 14:36:37 UT
Launch site Baikonur, LC1
Launch vehicle  Soyuz 11A511U
OKB name - S/N Soyuz 7K-T(A9) s/n 64
Basic shape  Sphere-cylinder + 2 wings
Dimension (m) 7.5 long, 2.3 dia
Mass (kg) 6570? kg
Earth orbit on Nov 17.8:
   - Perigee / Apogee 177 x 251 km
   - Eccentricity 0.006
   - Inclination 51.62°
   - Period 88.72 min

Docking & landing data:

Docking date - time 19 Nov 1975 - 16:19 UT
Target spacecraft Salyut 4 (Aft)
Docking orbit on Nov 20.2:
   - Perigee / Apogee 342 x 350 km
   - Eccentricity 0.001
   - Inclination 51.59°
   - Period 91.39 min
Undocking date - time 15 Feb 1976 - 23:04 UT
Landing date - time 16 Feb 1976 - 2:24 UT
Landing location 
Flight Duration (d:hr:min) 90:11:52 (90.5 days)
Nbr orbits 

1e unmanned docking with Salyut 4, test of board systems for the later Progress flights

Ref.: #4, #7, #125, #206 - update: 26.06.07 Home