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From Wikipedia, the free encyclopedia

Kosmos 99
Mission typeOptical imaging reconnaissance
COSPAR ID1965-103A
SATCAT no.01817
Mission duration8 days
Spacecraft properties
Spacecraft typeZenit-2 s/n U15001-04
Launch mass4730 kg [1]
Start of mission
Launch date10 December 1965
08:09:00 GMT
Launch siteBaikonur 31/6
End of mission
Landing date18 December 1965
Orbital parameters
Reference systemGeocentric [2]
RegimeLow Earth
Perigee altitude203 km
Apogee altitude309 km
Period89.6 minutes
Epoch10 December 1965

Kosmos 99 (Russian: Космос 99 meaning Cosmos 99) or Zenit-2 No.32 was a Soviet, first generation, low resolution, optical film-return reconnaissance satellite launched in 1965. A Zenit-2 spacecraft, Kosmos 99 was the thirty-second of eighty-one such satellites to be launched [3] and had a mass of 4,730 kilograms (10,430 lb).

Kosmos 99 was launched by a Vostok-2 rocket, serial number U15001-04,[4] flying from Site 31/6 at the Baikonur Cosmodrome. The launch took place at 08:09 GMT on 10 December 1965.[5] Following its successful arrival in orbit the spacecraft received its Kosmos designation; along with the International Designator 1965-103A and the Satellite Catalog Number 01817.

Kosmos 99 was operated in a low Earth orbit, at an epoch of 10 December 1965, it had a perigee of 203 kilometres (126 mi), an apogee of 309 kilometres (192 mi), an inclination of 65.0° and an orbital period of 89.6 minutes.[6] On 18 December 1965, after eight days in orbit, the satellite was deorbited with its return capsule descending by parachute for recovery by the Soviet force.[7]


  1. ^ "Cosmos 99 - NSSDCA/COSPAR ID: 1965-103A - Spacecraft - Details". NASA. 27 February 2020. Retrieved 26 March 2020.
  2. ^ "Cosmos 99 - NSSDCA ID: 1965-103A - Spacecraft - Telemetry Details". NASA. 27 February 2020. Retrieved 26 March 2020.
  3. ^ Krebs, Gunter. "Zenit-2 (11F61)". Gunter's Space Page. Archived from the original on 31 December 2011. Retrieved 1 January 2014.
  4. ^ Wade, Mark. "Vostok 8A92". Encyclopedia Astronautica. Archived from the original on 22 August 2016. Retrieved 1 January 2014.
  5. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 1 January 2014.
  6. ^ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 1 January 2014.
  7. ^ Wade, Mark. "Zenit-2". Encyclopedia Astronautica. Archived from the original on 21 April 2012. Retrieved 1 January 2014.
This page was last edited on 22 January 2021, at 18:09
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