Kosmos 1783

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Kosmos 1783
Mission type Early warning
COSPAR ID 1986-075A
SATCAT no. 16993
Mission duration 4 years [1]
Spacecraft properties
Spacecraft type US-K [2]
Launch mass 1,900 kilograms (4,200 lb)[3]
Start of mission
Launch date 3 October 1986, 13:05 (1986-10-03UTC13:05Z) UTC
Rocket Molniya-M/2BL[2]
Launch site Plesetsk Cosmodrome[2][3]
Orbital parameters
Reference system Geocentric
Regime Molniya [2]
Perigee 611 kilometres (380 mi)[4]
Apogee 20,041 kilometres (12,453 mi)[4]
Inclination 62.8 degrees[4]
Period 358.10 minutes[4]

Kosmos 1783 (Russian: Космос 1783 meaning Cosmos 1783) is a Soviet US-K missile early warning satellite which was launched in 1986 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 1783 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 13:05 UTC on 3 October 1986.[3] The launch placed the satellite into a molniya orbit but not into a usable orbit due to upper stage failure.[6]

It subsequently received its Kosmos designation, and the international designator 1986-075A.[3] The United States Space Command assigned it the Satellite Catalog Number 16993.[3]


  1. ^ 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 d e "Cosmos 1783". National Space Science Data Centre. 2012-04-20. Retrieved 2012-04-25. 
  4. ^ a b c d 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. 
  6. ^ Wade, Mark. "Molniya 8K78M". Encyclopedia Astronautica. Retrieved 2 May 2012. 

See also[edit]