Kosmos 991, a Parus (Tsiklon-B) military navigation and data-relay satellite, launched on a Kosmos-3M from Plesetsk Site 132/2 into a ~1000 km, 83° low Earth orbit for the Soviet naval navigation system.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 800 kg
- Flight
- 178th
- of 445 Kosmos-3M (11K65M) flights
- Date and time
- 28 February 1978, 06:43 UTC
- Rocket
- Kosmos-3M (11K65M)
- Builder
- Polyot
- Launch site
- 132/2, Plesetsk Cosmodrome, Russian Federation
- Payload
- Navigation
- International designator
- 1978-022
- Launches in 1978
- 22nd of 128
See it in orbit
Space Atlas shows the satellites and rocket stages from this launch in 3D.
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