Kosmos 31

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Kosmos 31
Mission type Technology
Operator VNIIEM
COSPAR ID 1964-028A
Spacecraft properties
Spacecraft type DS-MT
Manufacturer Yuzhnoye
Launch mass 325 kilograms (717 lb)
Start of mission
Launch date 6 June 1964, 06:00 (1964-06-06UTC06Z) UTC
Rocket Kosmos-2I 63S1
Launch site Kapustin Yar Mayak-2
End of mission
Decay date 20 October 1964 (1964-10-21)
Orbital parameters
Reference system Geocentric
Regime Low Earth
Perigee 221 kilometres (137 mi)
Apogee 485 kilometres (301 mi)
Inclination 48.9 degrees
Period 91.7 minutes

Kosmos 31 (Russian: Космос 31 meaning Cosmos 31), also known as DS-MT No.2 was a technology demonstration satellite which was launched by the Soviet Union in 1964 as part of the Dnepropetrovsk Sputnik programme. Its primary mission was to demonstrate an electric gyrodyne orientation system.[1] It also carried a scientific research package as a secondary payload, which was used to study cosmic rays.[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 06:00 UTC on 6 June 1964.[3]

Kosmos 31 was placed into a low Earth orbit with a perigee of 221 kilometres (137 mi), an apogee of 485 kilometres (301 mi), 48.9 degrees of inclination, and an orbital period of 91.7 minutes.[1] It decayed from orbit on 20 October 1964.[4] Kosmos 31 was the second of three DS-MT satellites to be launched. The first was lost in a launch failure in June 1963, and the third was Kosmos 51, which was launched in December 1964.[1][5]

See also[edit]


  1. ^ a b c d Wade, Mark. "DS-MT". 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.