Kosmos 1701 (Russian: Космос 1701 meaning Cosmos 1701) 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 1701
Mission typeEarly warning
COSPAR ID1985-105A Edit this at Wikidata
SATCAT no.16235
Mission duration4 years[1]
Spacecraft properties
Spacecraft typeUS-K[2]
Launch mass1,900 kilograms (4,200 lb)[3]
Start of mission
Launch date9 November 1985, 08:25 (1985-11-09UTC08:25Z) UTC
Launch sitePlesetsk Cosmodrome[2][3]
End of mission
Decay date11 May 2011 (2011-05-12)[4]
Orbital parameters
Reference systemGeocentric
Perigee altitude656 kilometres (408 mi)[4]
Apogee altitude39,701 kilometres (24,669 mi)[4]
Inclination63.1 degrees[4]
Period717.82 minutes[4]

Kosmos 1701 was launched from Site 41/1 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 08:25 UTC on 9 November 1985.[3] The launch successfully placed the satellite into a molniya orbit. It subsequently received its Kosmos designation, and the international designator 1985-105A.[3] The United States Space Command assigned it the Satellite Catalog Number 16235.[3]

It re-entered the Earth's atmosphere on 11 May 2011.[4]

See alsoEdit


  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 doi:10.1080/08929880212328. ISSN 0892-9882. S2CID 122901563. Archived from the original (PDF) on 15 March 2012.
  2. ^ a b c d e "US-K (73D6)". Gunter's Space Page. 8 March 2012. Retrieved 21 April 2012.
  3. ^ a b c d e "Cosmos 1701". National Space Science Data Centre. 20 April 2012. Retrieved 25 April 2012.
  4. ^ a b c d e f 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.