COSMOS 1853

COSMOS 1853 is an active satellite operated by Russia (CIS), launched on 1987-06-16 from PKMTR. With over 39 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 1,472 km and 1,482 km with an inclination of 74.0°. It travels at approximately 25,656 km/h (7.13 km/s), completing one full orbit every 115 minutes — that’s roughly 12.47 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 1853 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

COSMOS 1853 orbits at an average altitude of 1,477 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 1853’s average altitude, there are currently 311 active payloads and 252 tracked debris or rocket body fragments. With an inclination of 74.0°, COSMOS 1853 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 1,285 active satellites in total, of which 303 share a similar altitude band with COSMOS 1853.