Attempted to launch Kosmos 2084, a US-K (Oko) early-warning satellite, from Plesetsk. The Blok I fourth stage shut down about eight seconds after ignition at T+298 seconds, and the rocket and payload reentered and broke up near Tobolsk, Siberia.
- Outcome
- Partial
- Orbit
- Elliptical
- Elliptical orbit
- Payload to orbit
- 1.6 T (est.)
- Flight
- 223rd
- of 272 Molniya-M 2BL flights
- Date and time
- 21 June 1990, 20:45 UTC
- Rocket
- Molniya-M 2BL
- Builder
- Progress RSC
- Launch site
- 43/3 (43L), Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- International designator
- 1990-055
- Launches in 1990
- 57th of 121
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