Kosmos 917

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Kosmos 917
Mission type Early warning
COSPAR ID 1977-047A
SATCAT № 10059
Mission duration 4 years [1]
Spacecraft properties
Spacecraft type US-K [2]
Launch mass 1,900 kilograms (4,200 lb)
Start of mission
Launch date 16 June 1977, 01:58 (1977-06-16UTC01:58Z) UTC
Rocket Molniya-M/2BL[2]
Launch site Plesetsk Cosmodrome[2][3]
End of mission
Deactivated 30 March 1979[1]
Orbital parameters
Reference system Geocentric
Regime Molniya [2]
Perigee 620 kilometres (390 mi)[4]
Apogee 39,725 kilometres (24,684 mi)[4]
Inclination 62.9 degrees[4]
Period 717.60 minutes[4]

Kosmos 917 (Russian: Космос 917 meaning Cosmos 917) was a Soviet US-K missile early warning satellite which was launched in 1977 as part of the Soviet military's Oko programme. The satellite was designed to identify missile launches using optical telescopes and infrared sensors.[2]

Kosmos 917 was launched from Site 43/4 at Plesetsk Cosmodrome in the Russian SSR.[3] A Molniya-M carrier rocket with a 2BL upper stage was used to perform the launch, which took place at 04:44 UTC on 16 June 1977.[3] The launch successfully placed the satellite into a molniya orbit. It subsequently received its Kosmos designation, and the international designator 1977-047A.[4] The United States Space Command assigned it the Satellite Catalog Number 10059.[4]

Podvig says that it self-destructed.[1]

See also[edit]


  1. ^ a b c Podvig, Pavel (2002). "History and the Current Status of the Russian Early-Warning System" (PDF). Science and Global Security 10: 21–60. doi:10.1080/08929880212328. ISSN 0892-9882. 
  2. ^ a b c d e "US-K (73D6)". Gunter's Space Page. 2012-03-08. Retrieved 2012-04-21. 
  3. ^ a b c McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 2 May 2012. 
  4. ^ a b c d e f McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 30 April 2012.