FALCON 1 R/B

FALCON 1 R/B is a spent rocket body associated with United States, launched on 2009-07-14 from KWAJL on the MACSat launch. After 17 years in orbit, it continues to be tracked by global surveillance networks. It orbits in Low Earth Orbit (LEO) at altitudes between 574 km and 627 km with an inclination of 9.0°. It travels at approximately 27,221 km/h (7.56 km/s), completing one full orbit every 97 minutes — that’s roughly 14.89 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~10–25 years. Spent rocket bodies like FALCON 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.

FALCON 1 R/B orbits at an average altitude of 601 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 FALCON 1 R/B’s average altitude, there are currently 1,638 active payloads and 663 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 9.4% of all active satellites. With an inclination of 9.0°, FALCON 1 R/B passes over latitudes between 9.0°N and 9.0°S, concentrating coverage over equatorial and near-equatorial regions. Low-inclination orbits maximise revisit rates over specific tropical zones. United States operates approximately 12,413 active satellites in total, of which 1,102 share a similar altitude band with FALCON 1 R/B.