| Kosmos 33 | |
| Names List: | Zenit 2-19 |
| Mission Type: | Optical imaging reconnaissance |
| Operator: | OKB-1 |
| Cospar Id: | 1964-033A |
| Satcat: | 816 |
| Mission Duration: | 8 days |
| Spacecraft Type: | Zenit-2 |
| Manufacturer: | OKB-1 |
| Launch Mass: | 4730 kg[1] |
| Launch Date: | 23 June 1964, 10:19:00 GMT |
| Launch Rocket: | Vostok-2 |
| Launch Site: | Baikonur 31/6 |
| Launch Contractor: | OKB-1 |
| Disposal Type: | Recovered |
| Landing Date: | 1 July 1964 |
| Orbit Epoch: | 23 June 1964 |
| Orbit Reference: | Geocentric[2] |
| Orbit Regime: | Low Earth |
| Orbit Periapsis: | 209 km |
| Orbit Apoapsis: | 293 km |
| Orbit Inclination: | 65.0° |
| Orbit Period: | 89.4 minutes |
| Apsis: | gee |
| Programme: | Zenit programme Zenit-2 |
| Previous Mission: | Zenit 2-18 |
| Next Mission: | Zenit 2-20 |
| Programme2: | Kosmos (satellites) |
| Previous Mission2: | Kosmos 32 |
| Next Mission2: | Kosmos 34 |
Kosmos 33 (Russian: Космос 33 meaning Cosmos 33) or Zenit-2 No.19 was a Soviet, first generation, low resolution, optical film-return reconnaissance satellite launched in 1964. A Zenit-2 spacecraft, Kosmos 33 was the nineteenth of eighty-one such satellites to be launched[3] and had a mass of 4730kg (10,430lb).
Kosmos 33 was launched by a Vostok-2 rocket, serial number G15001-05,[4] flying from Site 31/6 at the Baikonur Cosmodrome. The launch took place at 10:19 GMT on 23 June 1964,[5] and following its successful arrival in orbit the spacecraft received its Kosmos designation; along with the International Designator 1964-033A and the Satellite Catalog Number 00816.[6]
Kosmos 33 was operated in a low Earth orbit; at an epoch of 23 June 1964 it had a perigee of 209km (130miles), an apogee of 293km (182miles), inclination of 65.0° and an orbital period of 89.4 minutes. On 1 July 1964, after 8 days in orbit, the satellite was deorbited with its return capsule descending by parachute for recovery by Soviet forces.[7] [8]