Official name SL-4 R/B
Alternative name Blok-I (Soyuz 11A511)
Cospar ID 1971-034B
Norad ID 5173
Launch date 1971-04-22
Launch site TTMTR
Launch vehicle Soyuz
RCS size UNKNOWN
Decay date 1971-04-25
Shape Cyl
Mass (kg) 2378.59
Diameter (m) 2.66
Height (m) 6.7
Span (m^2) 6.7