SCOUT G-1 R/B

SCOUT G-1 R/B is a spent rocket body associated with United States, launched on 1986-11-14 from Vandenberg SFB, California on the NNS O-17 launch. With over 40 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 952 km and 1,007 km with an inclination of 89.6°. It travels at approximately 26,510 km/h (7.36 km/s), completing one full orbit every 105 minutes — that’s roughly 13.76 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~100–500 years. Spent rocket bodies like SCOUT G-1 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.

SCOUT G-1 R/B orbits at an average altitude of 980 km in the upper LEO band, where atmospheric drag is negligible and objects can persist for centuries to millennia. This altitude is used by broadband constellations like OneWeb and by scientific missions requiring stable orbits far from the densest debris bands. Within ±50 km of SCOUT G-1 R/B’s average altitude, there are currently 301 active payloads and 959 tracked debris or rocket body fragments. With an inclination of 89.6°, SCOUT G-1 R/B passes over latitudes between 89.6°N and 89.6°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. United States operates approximately 12,413 active satellites in total, of which 89 share a similar altitude band with SCOUT G-1 R/B.