OKEAN O

OKEAN O is an active satellite operated by Russia (CIS), launched on 1999-07-17 from Baikonur, Kazakhstan. With over 27 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 627 km and 629 km with an inclination of 97.9°. It travels at approximately 27,168 km/h (7.55 km/s), completing one full orbit every 97 minutes — that’s roughly 14.80 orbits per day. Its near-polar, sun-synchronous orbit means it passes over any given point on Earth at approximately the same local solar time, ideal for consistent Earth observation lighting conditions. 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 ~10–25 years. Orbital Radar tracks OKEAN O in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

OKEAN O orbits at an average altitude of 628 km in a sun-synchronous orbit (SSO), a specialised subset of LEO where the orbital plane precesses to maintain a constant angle relative to the Sun. This provides consistent lighting conditions on every pass — essential for Earth observation, weather monitoring and environmental science. Within ±50 km of OKEAN O’s average altitude, there are currently 790 active payloads and 831 tracked debris or rocket body fragments — notable neighbours include ONEWEB-0050. With an inclination of 97.9°, OKEAN O passes over latitudes between 97.9°N and 97.9°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 16 share a similar altitude band with OKEAN O.