DELTA 1 DEB

DELTA 1 DEB is a tracked piece of space debris attributed to United States, launched on 1962-02-08 from Cape Canaveral, Florida. After more than 64 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 646 km and 748 km with an inclination of 48.3°. It travels at approximately 27,035 km/h (7.51 km/s), completing one full orbit every 99 minutes — that’s roughly 14.59 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~10–25 years. As orbital debris, DELTA 1 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.

DELTA 1 DEB orbits at an average altitude of 697 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 DELTA 1 DEB’s average altitude, there are currently 274 active payloads and 1,423 tracked debris or rocket body fragments — notable neighbours include TERRA, AQUA, LANDSAT 9. With an inclination of 48.3°, DELTA 1 DEB passes over latitudes between 48.3°N and 48.3°S, covering the tropical and temperate zones where most of the world’s population resides. Low-to-mid inclination orbits are efficient to reach from equatorial and mid-latitude launch sites. United States operates approximately 12,359 active satellites in total, of which 60 share a similar altitude band with DELTA 1 DEB.