OV1-10 R/B

OV1-10 R/B is a spent rocket body associated with United States, launched on 1966-12-11 from Vandenberg Space Force Base, United States on the OV1-9 launch. 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 571 km and 652 km with an inclination of 93.4°. It travels at approximately 27,200 km/h (7.56 km/s), completing one full orbit every 97 minutes — that’s roughly 14.86 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~10–25 years. Spent rocket bodies like OV1-10 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.

OV1-10 R/B orbits at an average altitude of 612 km in the mid-LEO band, where atmospheric drag is minimal but radiation exposure remains manageable. Objects at this altitude persist for decades to centuries, making debris mitigation critical. This regime is popular for remote sensing constellations and scientific instruments that need stable, long-duration orbits. Within ±50 km of OV1-10 R/B’s average altitude, there are currently 1,594 active payloads and 772 tracked debris or rocket body fragments — notable neighbours include ONEWEB-0050, STARLINK-3005, STARLINK-3090. This makes it one of the more crowded altitude bands, containing roughly 8.5% of all active satellites. With an inclination of 93.4°, OV1-10 R/B passes over latitudes between 93.4°N and 93.4°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 13,206 active satellites in total, of which 1,042 share a similar altitude band with OV1-10 R/B.