Kosmos 1177, a Yantar-4K1 (Oktan) high-resolution film-return photoreconnaissance satellite for the Soviet military (second flight of the type). Soyuz-U from Plesetsk Site 43/3; multi-week optical imaging with recoverable film capsules.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 6.6 T (est.)
- Flight
- 189th
- of 714 Soyuz U flights
- Date and time
- 29 April 1980, 13:30 UTC
- Rocket
- Soyuz U
- Builder
- Progress RSC
- Launch site
- 43/3 (43L), Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- International designator
- 1980-035
- Launches in 1980
- 35th of 108
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