Kosmos 690
| Names | Bion 2 Biocosmos 2 |
|---|---|
| Mission type | Bioscience |
| Operator | Institute of Biomedical Problems |
| COSPAR ID | 1974-080A |
| SATCAT no. | 7478 |
| Mission duration | 22 days, 10 hours and 48 minutes |
| Spacecraft properties | |
| Spacecraft type | Bion |
| Bus | Zenit 12KS |
| Manufacturer | TsSKB Progress |
| Launch mass | 5,500 kg (12,100 lb) |
| Start of mission | |
| Launch date | 20 October 1974, 17:59:59 UTC |
| Rocket | Soyuz-U |
| Launch site | Plesetsk 43/4 |
| Contractor | TsSKB |
| End of mission | |
| Disposal | Recovered |
| Landing date | 12 November 1974, 04:48:00 UTC |
| Landing site | Steppes of Kazakhstan, USSR |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth orbit |
| Perigee altitude | 223 km (139 mi) |
| Apogee altitude | 389 km (242 mi) |
| Inclination | 62.80° |
| Period | 90.40 minutes |
Kosmos 690 or Bion 2(in Russian: Бион 2, Космос 690), was a Bion satellite launched by the Soviet Union in late 1974.