SL-16 DEB

SL-16 DEB is a tracked piece of space debris attributed to Russia (CIS), launched on 1993-03-26 from Baikonur, Kazakhstan. With over 33 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 706 km and 790 km with an inclination of 71.0°. It travels at approximately 26,938 km/h (7.48 km/s), completing one full orbit every 100 minutes — that’s roughly 14.43 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~25–100 years. As orbital debris, SL-16 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.

SL-16 DEB orbits at an average altitude of 748 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 SL-16 DEB’s average altitude, there are currently 354 active payloads and 1,938 tracked debris or rocket body fragments — notable neighbours include LANDSAT 9. With an inclination of 71.0°, SL-16 DEB passes over latitudes between 71.0°N and 71.0°S, covering most populated land masses in both hemispheres. This mid-inclination band balances global coverage with efficient launch energy requirements. Russia (CIS) operates approximately 1,287 active satellites in total, of which 47 share a similar altitude band with SL-16 DEB.