Proton N-4 No.3, a heavy Soviet scientific satellite for cosmic-ray and high-energy particle research. UR-500 (Proton) from Baikonur Site 81/23 failed on 24 March 1966 when the second stage failed about 122 seconds after liftoff, ending the physics mission.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 3rd
- of 4 UR-500 flights
- Date and time
- 24 March 1966, 14:39 UTC
- Rocket
- UR-500
- Builder
- Khrunichev
- Launch site
- 81/23 (81L), Baikonur Cosmodrome, Republic of Kazakhstan
- Payload
- Astrophysics
- Launches in 1966
- 26th of 131