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Kosmos 31
Kosmos 31 ((ロシア語: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. It also carried a scientific research package as a secondary payload, which was used to study cosmic rays.〔 It was launched aboard a Kosmos-2I 63S1 rocket from pad 2 of the Mayak Launch Complex at Kapustin Yar. The launch occurred at 06:00 UTC on 6 June 1964. Kosmos 31 was placed into a low Earth orbit with a perigee of , an apogee of , 48.9 degrees of inclination, and an orbital period of 91.7 minutes.〔 It decayed from orbit on 20 October 1964. 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.〔 ==See also==
*1964 in spaceflight
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