COSMOS 1124 DEB

COSMOS 1124 DEB is a tracked piece of space debris attributed to Russia (CIS), launched on 1979-08-28 from PKMTR on the Oko launch. With over 47 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Medium Earth Orbit (MEO) at altitudes between 2,120 km and 36,669 km with an inclination of 65.4°. It travels at approximately 14,160 km/h (3.93 km/s), completing one full orbit every 11 hours 26 minutes — that’s roughly 2.10 orbits per day. Its orbital eccentricity of 0.6705 gives it a noticeably elliptical path, with significant altitude variation between perigee and apogee. As orbital debris, COSMOS 1124 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.

COSMOS 1124 DEB orbits at an average altitude of 19,395 km in Medium Earth Orbit, the region between LEO and GEO (2,000–35,786 km). MEO’s higher altitude gives each satellite a much larger ground footprint than LEO, meaning fewer spacecraft are needed for global coverage — but signal latency is higher and radiation from the Van Allen belts is a significant design constraint. Within ±50 km of COSMOS 1124 DEB’s average altitude, there are currently 0 active payloads and 13 tracked debris or rocket body fragments. This is a relatively sparse altitude band, containing less than 1% of all active satellites. With an inclination of 65.4°, COSMOS 1124 DEB passes over latitudes between 65.4°N and 65.4°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.