NIMBUS 2 DEB

NIMBUS 2 DEB is a tracked piece of space debris attributed to United States, launched on 1966-05-15 from Vandenberg SFB, California. After more than 60 years in orbit, it is one of the longest-surviving objects in the space catalogue. It orbits in Low Earth Orbit (LEO) at altitudes between 910 km and 948 km with an inclination of 100.3°. It travels at approximately 26,602 km/h (7.39 km/s), completing one full orbit every 104 minutes — that’s roughly 13.90 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~100–500 years. As orbital debris, NIMBUS 2 DEB poses a potential collision risk to operational satellites in nearby orbits and is continuously monitored by the U.S. Space Surveillance Network and other tracking systems.

NIMBUS 2 DEB orbits at an average altitude of 929 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 NIMBUS 2 DEB’s average altitude, there are currently 225 active payloads and 1,157 tracked debris or rocket body fragments. With an inclination of 100.3°, NIMBUS 2 DEB passes over latitudes between 100.3°N and 100.3°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 12,262 active satellites in total, of which 87 share a similar altitude band with NIMBUS 2 DEB.