Kosmos 146
Success
MAR 10196711:30:00 UTCMaiden flight of UR-500K 8K82K (later Proton-K), first Proton launch with an upper stage.
LIFTOFF
MAR 10 196711:30:00 UTC
Success
launched from Pad 81/23 Baikonur
aboard Proton UR-500K/D 8K82K/11S824 107227-01 into LEO
Payload
Kosmos 146 (Soyuz 7K-L1 #2P)
Spacecraft test