CZ-3B R/B

CZ-3B R/B is a spent rocket body associated with China, launched on 2013-05-01 from Xichang, China on the ZX-11 launch. After 13 years in orbit, it continues to be tracked by global surveillance networks. It orbits in Medium Earth Orbit (MEO) at altitudes between 184 km and 19,899 km with an inclination of 26.5°. It travels at approximately 17,741 km/h (4.93 km/s), completing one full orbit every 5 hours 49 minutes — that’s roughly 4.13 orbits per day. Its orbital eccentricity of 0.6006 gives it a noticeably elliptical path, with significant altitude variation between perigee and apogee. Spent rocket bodies like CZ-3B 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.

CZ-3B R/B orbits at an average altitude of 10,042 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 CZ-3B R/B’s average altitude, there are currently 0 active payloads and 3 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 26.5°, CZ-3B R/B passes over latitudes between 26.5°N and 26.5°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. China operates approximately 1,221 active satellites in total.