OKEAN 3

OKEAN 3 is an active satellite operated by Russia (CIS), launched on 1991-06-04 from PKMTR. With over 35 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 541 km and 560 km with an inclination of 82.5°. It travels at approximately 27,319 km/h (7.59 km/s), completing one full orbit every 96 minutes — that’s roughly 15.05 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~3–10 years. Orbital Radar tracks OKEAN 3 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

OKEAN 3 orbits at an average altitude of 551 km in the core of Low Earth Orbit, the most heavily utilised altitude band. The balance of moderate drag (limiting debris accumulation) and short signal path (enabling low-latency links and high-resolution imaging) makes this regime the default for most commercial and government missions. Within ±50 km of OKEAN 3’s average altitude, there are currently 3,436 active payloads and 365 tracked debris or rocket body fragments — notable neighbours include STARLINK-1184, STARLINK-1276, ONEWEB-0050. This makes it one of the more crowded altitude bands, containing roughly 19.7% of all active satellites. With an inclination of 82.5°, OKEAN 3 passes over latitudes between 82.5°N and 82.5°S, providing near-global coverage including the polar regions. Polar and near-polar orbits are used for reconnaissance, weather monitoring and Earth-observation missions that need to image every part of the planet. Russia (CIS) operates approximately 1,286 active satellites in total, of which 42 share a similar altitude band with OKEAN 3.