Kosmos 57
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| Mission type | Orbital test flight |
|---|---|
| Operator | OKB-1 |
| COSPAR ID | 1965-012A |
| SATCAT no. | 1093 |
| Mission duration | ≈ 3.5 hours |
| Spacecraft properties | |
| Spacecraft | Voskhod-3KD No.1 |
| Manufacturer | OKB-1 |
| Launch mass | 5682 kg [1] |
| Start of mission | |
| Launch date | 22 February 1965, 07:41:00 GMT |
| Rocket | Voskhod 11A57 |
| Launch site | Baikonur 31/6 |
| Contractor | OKB-1 |
| End of mission | |
| Disposal | Self-destructed |
| Destroyed | 22 February 1965 |
| Decay date | 31 March — 6 April 1965 |
| Orbital parameters | |
| Reference system | Geocentric[2] |
| Regime | Low Earth |
| Perigee altitude | 165 km |
| Apogee altitude | 427 km |
| Inclination | 64.8° |
| Period | 91.1 minutes |
| Epoch | 22 February 1965 |
Kosmos 57 (Russian: Космос 57 meaning Cosmos 57) was an uncrewed Soviet spacecraft launched on 22 February 1965.[3] The craft was essentially an uncrewed version of Voskhod 2. Its primary mission was to test the Volga airlock. The test was successful, but the craft was lost shortly after. The spaceflight is designated under the Kosmos system, placing it with many other Soviet scientific and military satellites.
The uncrewed craft was launched three weeks before Voskhod 2. The primary objective of Voskhod 2 was to conduct a spacewalk, which relied on the inflatable Volga airlock. Kosmos 57 was to test the performance of the airlock. The airlock opened and closed successfully and the craft was re-pressurized without flaw.[4]
