Kosmos 1687

Kosmos 1687 (Russian: Космос 1687 meaning Cosmos 1687) is a Soviet US-K missile early warning satellite which was launched in 1985 as part of the Soviet military's Oko programme. The satellite is designed to identify missile launches using optical telescopes and infrared sensors.[2]

Kosmos 1687
Mission typeEarly warning
COSPAR ID1985-088A
SATCAT no.16103
Mission duration4 years [1]
Spacecraft properties
Spacecraft typeUS-K[2]
Launch mass1,900 kilograms (4,200 lb)[3]
Start of mission
Launch date30 September 1985, 19:23 (1985-09-30UTC19:23Z) UTC
RocketMolniya-M/2BL[2]
Launch sitePlesetsk Cosmodrome[2][3]
Orbital parameters
Reference systemGeocentric
RegimeMolniya [2]
Perigee altitude640 kilometres (400 mi)[4]
Apogee altitude39,712 kilometres (24,676 mi)[4]
Inclination62.9 degrees[4]
Period717.72 minutes[4]
 

Kosmos 1687 was launched from Site 16/2 at Plesetsk Cosmodrome in the Russian SSR.[5] A Molniya-M carrier rocket with a 2BL upper stage was used to perform the launch, which took place at 19:23 UTC on 30 September 1985.[3] The launch successfully placed the satellite into a molniya orbit. It subsequently received its Kosmos designation, and the international designator 1985-088A.[3] The United States Space Command assigned it the Satellite Catalog Number 16103.[3]

See also

References
  1. 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 10.1.1.692.6127. doi:10.1080/08929880212328. ISSN 0892-9882. S2CID 122901563. Archived from the original (PDF) on 2012-03-15.
  2. "US-K (73D6)". Gunter's Space Page. 2012-03-08. Retrieved 2012-04-21.
  3. "Cosmos 1687". National Space Science Data Centre. 2012-04-20. Retrieved 2012-04-25.
  4. McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 30 April 2012.
  5. McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 2 May 2012.
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