Zenit-4 No.31, a Soviet high-resolution film-return photoreconnaissance satellite launched on a Voskhod from Plesetsk Site 41/1; the mission failed on ascent and did not receive a Kosmos designation.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 39th
- of 299 Voskhod flights
- Date and time
- 20 June 1967, 11:00 UTC
- Rocket
- Voskhod
- Builder
- RKK Energia
- Launch site
- 41/1, Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- Launches in 1967
- 69th of 139