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Oko

Molniya 8K78M launch from Plesetsk (Soviet Union) on March 31, 1981, carrying 1 payload. GCAT records the launch as a success.

March 31, 1981 · 09:39 UTCLaunch 1981-031Launch no. 2,418 in the log
RocketMolniya 8K78Mvariant 2BL
SpaceportPlesetskpad LC41/1
OutcomeSuccess
Launch agencyRVSNSoviet Union

Flight

Date and time (UTC)
March 31, 1981, 09:39
Launch designation
1981-031
Mission
Oko
Flight name
Kosmos-1261
Vehicle flight ID
78017 -553

Orbit and payload

Initial apogee
39,765 km
Payload mass to orbit
1.6 t
Payloads
1
GCAT launch code
OS

Payloads

PayloadDesignationOwnerMission typeMassFate
Kosmos-12611981-031ANORAD 12376Proto-Vozdhusnoy OboronyMissile early warning1,250 kgIn orbit

Source: GCAT launch list and payload catalogs, Jonathan C. McDowell (CC BY 4.0). Orbit values are the initial orbit reported for the launch.