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Kosmos 277

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Kosmos 277

Kosmos 277
Mission type ABM radar target
COSPAR ID 1969-033A
Spacecraft properties
Spacecraft type DS-P1-Yu
Manufacturer Yuzhnoye
Launch mass 325 kilograms (717 lb)
Start of mission
Launch date 4 April 1969, 13:00:04 (1969-04-04T13:00:04Z) UTC
Rocket Kosmos-2I 63SM
Launch site Plesetsk 133/1
End of mission
Decay date Did not recognize date. Try slightly modifying the date in the first parameter.
Orbital parameters
Reference system Geocentric
Regime Low Earth
Perigee 256 kilometres (159 mi)
Apogee 412 kilometres (256 mi)
Inclination 70.9 degrees
Period 91.2 minutes

Kosmos 277 (Russian: Космос 277 meaning Cosmos 277), known before launch as DS-P1-Yu No.20, was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was a 325-kilogram (717 lb) spacecraft, which was built by the Yuzhnoye Design Bureau, and launched in 1969 as part of the Dnepropetrovsk Sputnik programme.[1]

Launch

Kosmos 277 was launched from Site 133/1 at the Plesetsk Cosmodrome,[2] atop a Kosmos-2I 63SM carrier rocket. The launch occurred on 4 April 1969 at 13:00:04 UTC, and resulted in Kosmos 277's successful deployment into low Earth orbit.[3] Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1969-033A.

Kosmos 277 was operated in an orbit with a perigee of 256 kilometres (159 mi), an apogee of 412 kilometres (256 mi), 70.9 degrees of inclination, and an orbital period of 91.2 minutes.[1][4] It remained in orbit until it decayed and reentered the atmosphere on 6 July 1969.[4] It was the twentieth of seventy nine DS-P1-Yu satellites to be launched,[1] and the nineteenth of seventy two to successfully reach orbit.[5]


See also


References

  1. ^ a b c Wade, Mark. "DS-P1-Yu". Encyclopedia Astronautica. Retrieved 13 August 2009. 
  2. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 13 August 2009. 
  3. ^ Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Retrieved 13 August 2009. 
  4. ^ a b McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 13 August 2009. 
  5. ^ Krebs, Gunter. "DS-P1-Yu (11F618)". Gunter's Space Page. Retrieved 13 August 2009. 
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