Kosmos 936
Conception of Bion 4 in orbit | |
| Names | Bion 4 Biocosmos 4 |
|---|---|
| Mission type | Bioscience |
| Operator | Institute of Biomedical Problems |
| COSPAR ID | 1977-074A |
| SATCAT no. | 10172 |
| Mission duration | 18 days, 11 hours and 4 minutes |
| Spacecraft properties | |
| Spacecraft type | Bion |
| Bus | Zenit 12KS |
| Manufacturer | TsSKB |
| Launch mass | 4,000 kg (8,800 lb) |
| Start of mission | |
| Launch date | 3 August 1977, 14:01:00 UTC |
| Rocket | Soyuz-U |
| Launch site | Plesetsk 43/3 |
| Contractor | TsSKB |
| End of mission | |
| Recovered by | Soviet Space Forces |
| Landing date | 22 August 1977, 01:05 UTC |
| Landing site | 51°53′N 61°30′E / 51.883°N 61.500°E near Kustanay, Kazakhstan, USSR |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth orbit |
| Perigee altitude | 224 km (139 mi) |
| Apogee altitude | 419 km (260 mi) |
| Inclination | 62.80° |
| Period | 90.70 min |
Kosmos 936 or Bion 4 (Бион 4, Космос 936) was a Bion satellite. The mission involved nine countries in a series of biomedical research experiments. The experiments were primarily follow-ups to the Bion 3 (Kosmos 782) flight. Scientists from the Bulgaria, Czechoslovakia, East Germany, France, Hungary, Poland, Romania, the United States and the Soviet Union conducted experiments in physics and biology on the mission.