| Kosmos 129 | |
| Mission Type: | Optical imaging recpnnaissance |
| Operator: | OKB-1 |
| Cospar Id: | 1966-091A |
| Satcat: | 02491 |
| Mission Duration: | 7 days |
| Spacecraft Type: | Zenit-2 |
| Manufacturer: | OKB-1 |
| Launch Mass: | 4730 kg |
| Launch Date: | 14 October 1966 12:14:00 GMT |
| Launch Rocket: | Vostok-2 s/n U1500-05 |
| Launch Site: | Plesetsk, Site 41/1 |
| Disposal Type: | Recovered |
| Landing Date: | 21 October 1966, 06:14 GMT |
| Orbit Epoch: | 14 October 1966 |
| Orbit Reference: | Geocentric |
| Orbit Regime: | Low Earth |
| Orbit Periapsis: | 180 km |
| Orbit Apoapsis: | 312 km |
| Orbit Inclination: | 65.0° |
| Orbit Period: | 89.4 minutes |
| Apsis: | gee |
Kosmos 129 (Russian: Космос 129 meaning Cosmos 129) or Zenit-2 No.33 was a Soviet, first generation, low resolution, optical film-return reconnaissance satellite launched in 1966. A Zenit-2 spacecraft, Kosmos 129 was the forty-second of eighty-one such satellites to be launched[1] [2] and had a mass of .
Kosmos 129 was launched by a Vostok-2 rocket, serial number U1500-05,[3] flying from Site 41/1 at the Plesetsk Cosmodrome. The launch took place at 12:14 GMT on 14 October 1966, and following its successful arrival in orbit the spacecraft received its Kosmos designation; along with the International Designator 1966-091A and the Satellite Catalog Number 02491.[4]
Kosmos 129 was operated in a low Earth orbit, at an epoch of 14 October 1966, it had a perigee of, an apogee of, an inclination of 65.0°, and an orbital period of 89.4 minutes.[5] After seven days in orbit, Kosmos 129 was deorbited, with its return capsule descending under parachute, landing at 06:14 GMT on 21 October 1966, and recovered by Soviet force.[6]