SL-24 R/B

SL-24 R/B is a spent rocket body associated with Russia (CIS), launched on 2013-08-22 from Yasny / Dombarovsky, Russia on the Kompsat-5 launch. After 13 years in orbit, it continues to be tracked by global surveillance networks. It orbits in Low Earth Orbit (LEO) at altitudes between 539 km and 1,187 km with an inclination of 97.5°. It travels at approximately 26,723 km/h (7.42 km/s), completing one full orbit every 102 minutes — that’s roughly 14.09 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 ~100–500 years. Spent rocket bodies like SL-24 R/B are among the largest pieces of uncontrolled space debris and are priority targets for collision avoidance manoeuvres and future active debris removal efforts.

SL-24 R/B orbits at an average altitude of 863 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 SL-24 R/B’s average altitude, there are currently 258 active payloads and 2,147 tracked debris or rocket body fragments — notable neighbours include NOAA 20, ONEWEB-0455. With an inclination of 97.5°, SL-24 R/B passes over latitudes between 97.5°N and 97.5°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 1,514 active satellites in total, of which 74 share a similar altitude band with SL-24 R/B.