COSMOS 2604

COSMOS 2604 is an active satellite operated by Russia (CIS), launched on 2026-02-05 from PKMTR. As a relatively recent addition to the catalogue, its orbital elements are well-characterised. It orbits in Low Earth Orbit (LEO) at altitudes between 476 km and 503 km with an inclination of 96.6°. It travels at approximately 27,441 km/h (7.62 km/s), completing one full orbit every 94 minutes — that’s roughly 15.25 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. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~1–3 years. Orbital Radar tracks COSMOS 2604 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

COSMOS 2604 orbits at an average altitude of 490 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 COSMOS 2604’s average altitude, there are currently 9,174 active payloads and 234 tracked debris or rocket body fragments — notable neighbours include STARLINK-1017, STARLINK-1039, STARLINK-1047. This makes it one of the more crowded altitude bands, containing roughly 52.6% of all active satellites. With an inclination of 96.6°, COSMOS 2604 passes over latitudes between 96.6°N and 96.6°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 51 share a similar altitude band with COSMOS 2604.