STTW-1

STTW-1 is an active satellite operated by China, launched on 1986-02-01 from Xichang, China. With over 40 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Geostationary Orbit (GEO) at altitudes between 35,793 km and 35,814 km with an inclination of 10.6°. It travels at approximately 11,067 km/h (3.07 km/s), completing one full orbit every ~24 hours (geosynchronous) — that’s roughly 1.00 orbits per day. At geostationary altitude, there is no meaningful atmospheric drag — this object will remain in orbit indefinitely unless actively deorbited. Orbital Radar tracks STTW-1 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

STTW-1 occupies geostationary orbit at approximately 35,786 km above the equator, where its orbital period matches the Earth’s 24-hour rotation. From the ground, it appears to hover over a fixed point — ideal for broadcast television, weather monitoring and wideband communications. With an inclination of 10.6°, it traces a small figure-of-eight pattern relative to the equator rather than remaining perfectly stationary, which can indicate aging stationkeeping fuel or a deliberate inclined-orbit strategy. Within ±50 km of STTW-1’s average altitude, there are currently 714 active payloads and 64 tracked debris or rocket body fragments — notable neighbours include ASTRA 1N, GOES 16, TDRS 13. China operates approximately 1,219 active satellites in total, of which 111 share a similar altitude band with STTW-1.