Kosmos 521 (DS-P1-M #6), a Soviet radar target satellite for the Istrebitel Sputnikov anti-satellite weapons program. Kosmos-3M from Plesetsk Site 132/2 placed the craft in LEO as an ASAT intercept and radar-calibration target.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 643 kg
- Flight
- 59th
- of 445 Kosmos-3M (11K65M) flights
- Date and time
- 29 September 1972, 20:18 UTC
- Rocket
- Kosmos-3M (11K65M)
- Builder
- Polyot
- Launch site
- 132/2, Plesetsk Cosmodrome, Russian Federation
- Payload
- Test Target
- International designator
- 1972-074
- Launches in 1972
- 79th of 113
See it in orbit
Space Atlas shows the satellites and rocket stages from this launch in 3D.
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