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Kosmos 520

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Mission type
  
Early warning

Mission duration
  
4 years

Rocket
  
Molniya-M/2BL

COSPAR ID
  
1972-072A

Spacecraft type
  
US-K

Launch date
  
19 September 1972

Launch mass
  
1,900 kilograms (4,200 lb)

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Kosmos 520 (Russian: Космос 520 meaning Cosmos 520) was the first Soviet US-K missile early warning satellite. It was launched in 1972 as part of the Oko programme. The satellite is designed to identify missile launches using optical telescopes and infrared sensors.

Kosmos 520 was launched from Site 41/1 at Plesetsk Cosmodrome in the Soviet Union. A Molniya-M carrier rocket with a 2BL upper stage was used to perform the launch, which took place at 19:19 UTC on 19 September 1972. The launch successfully placed the satellite into a molniya orbit. It subsequently received its Kosmos designation, and the international designator 1972-072A. The United States Space Command assigned it the Satellite Catalog Number 06192.

References

Kosmos 520 Wikipedia