Proton 4, the last and heaviest of the Soviet Proton scientific satellites (~17 t), studying high-energy cosmic rays and particle interactions. Proton-K from Baikonur Site 81/24 lofted it on 16 November 1968 into LEO; reentered 24 July 1969.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 17 T (est.)
- Flight
- 1st
- of 29 Proton-K flights
- Date and time
- 16 November 1968, 11:40 UTC
- Rocket
- Proton-K
- Builder
- Khrunichev
- Launch site
- 81/24 (81P), Baikonur Cosmodrome, Republic of Kazakhstan
- Payload
- Earth Science
- International designator
- 1968-103
- Launches in 1968
- 111th of 128
See it in orbit
Space Atlas shows the satellites and rocket stages from this launch in 3D.
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