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Kosmos 398
LK Lander
Mission typeSpacecraft test
OperatorSoviet space program
COSPAR ID1971-016A Edit this at Wikidata
SATCAT no.4966
Mission duration24 years, 9 months and 14 days (in orbit)
Spacecraft properties
SpacecraftT2K No.2
Launch mass7,255 kilograms (15,995 lb)
Start of mission
Launch date26 February 1971, 12:14:00 (1971-02-26UTC12:14Z) UTC
Launch siteBaikonur 31/6
End of mission
Decay date10 December 1995
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Perigee altitude196 kilometres (122 mi)
Apogee altitude276 kilometres (171 mi)
Period88.9 minutes
Epoch25 February 1971, 19:00:00 UTC[1]
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Kosmos 398 (Russian: Космос 398; meaning Cosmos 398), also known as T2K No.2, was the second unmanned test flight of the Soviet LK lander, using the T2K version. It followed the same program as Kosmos 379, launching on February 26, 1971 into a 276 km by 196 km orbit. It main objective was to validate contingency abort-to-lunar orbit manoeuvres.

See also


  1. ^ "Cosmos 398". NASA. Retrieved 2 May 2018.