Kosmos 400 (DS-P1-M #4 / Lira), a Soviet radar-calibration ASAT target satellite. Kosmos-3M from Plesetsk LC-132/1 placed it in LEO on 18 March 1971; intercepted and destroyed by the Kosmos 404 IS-A interceptor on 4 April.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 643 kg
- Flight
- 33rd
- of 445 Kosmos-3M (11K65M) flights
- Date and time
- 18 March 1971, 21:45 UTC
- Rocket
- Kosmos-3M (11K65M)
- Builder
- Polyot
- Launch site
- 132/1 (132L), Plesetsk Cosmodrome, Russian Federation
- Payload
- Test Target
- International designator
- 1971-020
- Launches in 1971
- 23rd of 133
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