Kosmos 1658 (Russian: Космос 1658 meaning Cosmos 1658) was a Soviet US-K missile early warning satellite which was launched in 1985 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 1658
Mission typeEarly warning
COSPAR ID1985-045A Edit this at Wikidata
SATCAT no.15808
Mission duration4 years [1]
Spacecraft properties
Spacecraft typeUS-K[2]
Launch mass1,900 kilograms (4,200 lb)
Start of mission
Launch date11 June 1985, 14:27 (1985-06-11UTC14:27Z) UTC
Launch sitePlesetsk Cosmodrome[2][3]
End of mission
Deactivated3 September 1987[1]
Decay date12 November 2005 (2005-11-13)[4]
Orbital parameters
Reference systemGeocentric
RegimeMolniya [2]
Perigee altitude602 kilometres (374 mi)[4]
Apogee altitude39,754 kilometres (24,702 mi)[4]
Inclination62.9 degrees[4]
Period717.82 minutes[4]

Kosmos 1658 was launched from Site 41/1 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 14:27 UTC on 11 June 1985.[3] The launch successfully placed the satellite into a molniya orbit. It subsequently received its Kosmos designation, and the international designator 1985-045A.[4] The United States Space Command assigned it the Satellite Catalog Number 15808.[4]

It re-entered the Earth's atmosphere on 12 November 2005.[4]

See alsoEdit


  1. ^ a b Podvig, Pavel (2002). "History and the Current Status of the Russian Early-Warning System" (PDF). Science and Global Security. 10 (1): 21–60. Bibcode:2002S&GS...10...21P. CiteSeerX doi:10.1080/08929880212328. ISSN 0892-9882. S2CID 122901563. Archived from the original (PDF) on 2012-03-15.
  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 g h McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 30 April 2012.