COSMOS 1257

COSMOS 1257 is an active satellite operated by Russia (CIS), launched on 1981-03-06 from PKMTR. With over 45 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 1,468 km and 1,479 km with an inclination of 74.0°. It travels at approximately 25,662 km/h (7.13 km/s), completing one full orbit every 115 minutes — that’s roughly 12.48 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 1257 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

COSMOS 1257 orbits at an average altitude of 1,474 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 1257’s average altitude, there are currently 313 active payloads and 248 tracked debris or rocket body fragments. With an inclination of 74.0°, COSMOS 1257 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 305 share a similar altitude band with COSMOS 1257.