Orbited Kosmos 2138, a Yantar-4K2 film-return photoreconnaissance satellite for the Soviet military, launched from Plesetsk and operated until late May 1991.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 6.6 T (est.)
- Flight
- 575th
- of 714 Soyuz U flights
- Date and time
- 26 March 1991, 13:45 UTC
- Rocket
- Soyuz U
- Builder
- Progress RSC
- Launch site
- 16/2, Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- International designator
- 1991-023
- Launches in 1991
- 23rd of 91
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