Norad ID: 6206
| Spacetrack Directory Name | COSMOS 521 |
| Follow COSMOS 521 | COSMOS 521 Tracker |
| Pass predictions COSMOS 521 | Pass predictions COSMOS 521 |
| Orbit launches |
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| Days in orbit | 19734 |
| Country/organisation of origin | Commonwealth of Independent States (former USSR) (CIS) |
| Starting point | PLMSC (Plesetsk Missile and Space Complex, Russia) |
| WWW | Here |
| Perigee | 977 km |
| Apogee | 1005 km |
| Orbit slope (inclination) | 65.83° |
| Laps per day | 14 |
| Height COSMOS 521 | 1000.24 km |
COSMOS 521, 6206 is a payload satellite owned by PKO (CIS) in LEO that was launched on Fri, 29 Sep 1972 UTC via a KOSMOS 11K65M launch vehicle from the Plesetsk Missile And Space Complex (PKMTR). Payloads include a variety of satellites, spacecraft, and rockets equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
satellite COSMOS 521 Date of exalting 29.09.1972y. Average height of ISS COSMOS 521 hundred 1000.24 km. Average velocity COSMOS 521 is 26472.09 km/h. Inclination COSMOS 521 satellite 65.83°.