DELTA 2 R/B(1)

DELTA 2 R/B(1) is a spent rocket body associated with United States, launched on 1992-12-18 from Cape Canaveral, Florida on the Navstar GPS SVN 29 launch. With over 34 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 543 km and 613 km with an inclination of 20.3°. It travels at approximately 27,265 km/h (7.57 km/s), completing one full orbit every 96 minutes — that’s roughly 14.96 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~3–10 years. Spent rocket bodies like DELTA 2 R/B(1) are among the largest pieces of uncontrolled space debris and are priority targets for collision avoidance manoeuvres and future active debris removal efforts.

DELTA 2 R/B(1) orbits at an average altitude of 578 km in the core of Low Earth Orbit, the most heavily utilised altitude band. The balance of moderate drag (limiting debris accumulation) and short signal path (enabling low-latency links and high-resolution imaging) makes this regime the default for most commercial and government missions. Within ±50 km of DELTA 2 R/B(1)’s average altitude, there are currently 2,957 active payloads and 528 tracked debris or rocket body fragments — notable neighbours include ONEWEB-0050, STARLINK-2112, STARLINK-2722. This makes it one of the more crowded altitude bands, containing roughly 16.9% of all active satellites. With an inclination of 20.3°, DELTA 2 R/B(1) passes over latitudes between 20.3°N and 20.3°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 12,413 active satellites in total, of which 2,400 share a similar altitude band with DELTA 2 R/B(1).