Failed Zenit-4 (#18) high-resolution film-return photoreconnaissance satellite for the Soviet military, intended as a Kosmos cover name. Voskhod 11A57 from Plesetsk LC-41/1 on 17 May 1966 did not reach orbit, so no Kosmos number was assigned.
- Outcome
- Failure
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 23rd
- of 299 Voskhod flights
- Date and time
- 17 May 1966, 11:00 UTC
- Rocket
- Voskhod
- Builder
- RKK Energia
- Launch site
- 41/1, Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- Launches in 1966
- 46th of 131