| Mission type | Optical imaging reconnaissance |
|---|---|
| Operator | OKB-1 |
| COSPAR ID | 1964-017A |
| SATCAT no. | 00779 |
| Mission duration | 8 days |
| Spacecraft properties | |
| Spacecraft type | Zenit-2 |
| Manufacturer | OKB-1 |
| Launch mass | 4730 kg[1] |
| Start of mission | |
| Launch date | 4 April 1964, 09:36:00 GMT |
| Rocket | Vostok-2 s/n G15001-04 |
| Launch site | Baikonur, 31/6 |
| Contractor | OKB-1 |
| End of mission | |
| Disposal | Recovered |
| Landing date | 12 April 1964 |
| Orbital parameters | |
| Reference system | Geocentric[2] |
| Regime | Low Earth |
| Perigee altitude | 213 km |
| Apogee altitude | 373 km |
| Inclination | 65.0° |
| Period | 90.4 minutes |
| Epoch | 4 April 1964 |
Kosmos 28 (Russian: Космос 28 meaning Cosmos 28) or Zenit-2 No.16 was a Soviet, a first generation, low resolution, optical film-return reconnaissance satellite which was launched in 1964. A Zenit-2 spacecraft, Kosmos 28 was the sixteenth of eighty-one such satellites to be launched[3][4] and had a mass of 4,730 kilograms (10,430 lb).
A Vostok-2 rocket, s/n G15001-04,[5] was used to launch Kosmos 28. The launch took place at 09:36 GMT on 4 April 1964 from Site 31/6 at the Baikonur Cosmodrome.[6] Following its successful arrival in orbit the spacecraft received its Kosmos designation, along with the International Designator 1964-017A and the Satellite Catalog Number 00779.
Kosmos 28 was operated in a low Earth orbit. On 4 April 1964, it had a perigee of 213 kilometres (132 mi), an apogee of 373 kilometres (232 mi), with inclination of 65.0° and an orbital period of 90.4 minutes. On 12 April 1964, the spacecraft was deorbited, with its return capsule descending by parachute for recovery by Soviet forces.[7][4]
