THORAD AGENA D DEB

THORAD AGENA D DEB is a tracked piece of space debris attributed to United States, launched on 1970-04-08 from Vandenberg Space Force Base, United States on the Nimbus D launch. After more than 56 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 1,062 km and 1,113 km with an inclination of 99.8°. It travels at approximately 26,318 km/h (7.31 km/s), completing one full orbit every 107 minutes — that’s roughly 13.46 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~500–1,000 years. As orbital debris, THORAD AGENA D 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.

THORAD AGENA D DEB orbits at an average altitude of 1,088 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 THORAD AGENA D DEB’s average altitude, there are currently 307 active payloads and 537 tracked debris or rocket body fragments — notable neighbours include ONEWEB-0041. With an inclination of 99.8°, THORAD AGENA D DEB passes over latitudes between 99.8°N and 99.8°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 13,196 active satellites in total, of which 43 share a similar altitude band with THORAD AGENA D DEB.