Kosmos 25

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Kosmos 25
Mission type Radar target
COSPAR ID 1964-010A
Spacecraft properties
Spacecraft type DS-P1
Manufacturer Yuzhnoye
Launch mass 355 kilograms (783 lb)
Start of mission
Launch date 27 February 1964, 13:26 (1964-02-27UTC13:26Z) UTC
Rocket Kosmos-2I 63S1
Launch site Kapustin Yar Mayak-2
End of mission
Decay date 21 November 1964 (1964-11-22)
Orbital parameters
Reference system Geocentric
Regime Low Earth
Perigee 260 kilometres (160 mi)
Apogee 495 kilometres (308 mi)
Inclination 49.1 degrees
Period 92.1 minutes

Kosmos 25 (Russian: Космос 25 meaning Cosmos 25), also known as DS-P1 No.4 was a prototype radar target satellite for anti-ballistic missile tests, which was launched by the Soviet Union in 1964 as part of the Dnepropetrovsk Sputnik programme. Its primary mission was to demonstrate the necessary technologies for radar tracking of spacecraft, which would allow future satellites to function as targets.[1]

It was launched aboard a Kosmos-2I 63S1 rocket,[2] from pad 2 of the Mayak Launch Complex at Kapustin Yar. The launch occurred at 13:26 UTC on 27 February 1964.[3]

Kosmos 25 was placed into a low Earth orbit with a perigee of 260 kilometres (160 mi), an apogee of 495 kilometres (308 mi), 49.1 degrees of inclination, and an orbital period of 92.1 minutes.[1] It decayed from orbit on 21 November 1964.[4]

Kosmos 25 was a prototype DS-P1 satellite, the last of four to be launched.[1] Of these, it was the third to successfully reach orbit after Kosmos 6 and Kosmos 19.[5] It was succeeded by the first operational DS-P1 satellite, Kosmos 36.

See also[edit]


  1. ^ a b c Wade, Mark. "DS-P1". Encyclopedia Astronautica. Retrieved 26 May 2009. 
  2. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 26 May 2009. 
  3. ^ Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Retrieved 26 May 2009. 
  4. ^ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 26 May 2009. 
  5. ^ Wade, Mark. "DS". Encyclopedia Astronautica. Retrieved 26 May 2009.