SHIYAN 10 (SY-10)

SHIYAN 10 (SY-10) is an active satellite operated by China, launched on 2021-09-27 from Xichang, China on the Shiyan 10 launch. It orbits in Medium Earth Orbit (MEO) at altitudes between 1,771 km and 38,577 km with an inclination of 63.1°. It travels at approximately 13,950 km/h (3.88 km/s), completing one full orbit every 11 hours 58 minutes — that’s roughly 2.01 orbits per day. Its orbital eccentricity of 0.6933 gives it a noticeably elliptical path, with significant altitude variation between perigee and apogee. Orbital Radar tracks SHIYAN 10 (SY-10) in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

SHIYAN 10 (SY-10) orbits at an average altitude of 20,174 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 SHIYAN 10 (SY-10)’s average altitude, there are currently 106 active payloads and 13 tracked debris or rocket body fragments — notable neighbours include GPS BIIR-5 (PRN 22), GPS BIIR-8 (PRN 16), GPS BIIR-11 (PRN 19). With an inclination of 63.1°, SHIYAN 10 (SY-10) passes over latitudes between 63.1°N and 63.1°S, covering most populated land masses in both hemispheres. This mid-inclination band balances global coverage with efficient launch energy requirements. China operates approximately 1,221 active satellites in total, of which 5 share a similar altitude band with SHIYAN 10 (SY-10).