COSMOS 510

COSMOS 510 is an active satellite operated by OKB-10 (Russia (CIS)), launched on 1972-07-20 from Plesetsk Cosmodrome, Russia on the Strela-1M launch. After more than 54 years in orbit, it is one of the longest-surviving objects in the space catalogue. It orbits in Low Earth Orbit (LEO) at altitudes between 1,495 km and 1,509 km with an inclination of 74.0°. It travels at approximately 25,615 km/h (7.12 km/s), completing one full orbit every 116 minutes — that’s roughly 12.41 orbits per day. Its near-circular orbit (eccentricity close to zero) means it maintains a very consistent altitude throughout each revolution. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is thousands of years. Orbital Radar tracks COSMOS 510 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

COSMOS 510 orbits at an average altitude of 1,502 km in the uppermost reaches of Low Earth Orbit. At this altitude, orbital decay is effectively zero without active deorbiting, and coverage footprints are significantly larger than lower LEO, though at the cost of higher latency. Within ±50 km of COSMOS 510’s average altitude, there are currently 320 active payloads and 402 tracked debris or rocket body fragments. With an inclination of 74.0°, COSMOS 510 passes over latitudes between 74.0°N and 74.0°S, covering most populated land masses in both hemispheres. This mid-inclination band balances global coverage with efficient launch energy requirements. Russia (CIS) operates approximately 1,553 active satellites in total, of which 304 share a similar altitude band with COSMOS 510.