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TIANHUI 4B — Live Satellite Tracking (NORAD 50573)
Track TIANHUI 4B (NORAD catalog number 50573) live on the WatchSat interactive 3D globe above. Its position is propagated in real time from the latest CelesTrak two-line element set using the SGP4/SDP4 orbital model — the same math professional trackers run. It is object B of 2021's 134th orbital launch (COSPAR designation 2021-134B). It went up together with 1 other satellite from that launch still in the active catalog. As of this element set it had completed roughly 26,252 revolutions of Earth.
Moving at about 7.66 km/s, TIANHUI 4B flies in low Earth orbit at an altitude of roughly 424 × 438 km, completing one revolution every 93.1 minutes — about 15.5 trips around Earth per day. The orbit is essentially circular (eccentricity 0.0011). Inclined 89.0° — nearly pole-to-pole — its ground track sweeps essentially every latitude. Its orbital plane crosses the equator northbound at right ascension 311.0°. Earth's equatorial bulge drifts that plane westward about 0.14° per day.
Orbital elements
| Orbit regime | low Earth orbit (LEO) |
|---|---|
| Perigee × apogee altitude | ~424 km × 438 km |
| Inclination | 88.97° |
| Orbital period | 93.1 min (15.47 rev/day) |
| Eccentricity | 0.00105 |
| Element set epoch | 2026-09-07 |
| COSPAR designation | 2021-134B |
| NORAD catalog number | 50573 |
This page's orbital elements come from the CelesTrak catalog of 2026-09-08. The live 3D view above fetches its own current CelesTrak data when the page opens, through an edge cache that refreshes roughly every 30 minutes.
About the Other Active Satellites group
TIANHUI 4B is one of 4,471 active satellites in WatchSat's general catalog — the broad population of Earth-observation, communications, science, amateur-radio and technology spacecraft outside the giant broadband constellations. Browse all other active satellites live in 3D.
Can you see TIANHUI 4B from the ground?
Sometimes. Like most low-Earth-orbit spacecraft, TIANHUI 4B is visible only around dawn and dusk, when your sky is dark but the satellite is still sunlit — and whether you can spot it depends on its size and reflectivity. See pass predictions for your location for when it is above your horizon and sunlit.
Related satellites
Nearest catalog neighbors of TIANHUI 4B in the Other Active Satellites group — usually craft from the same or adjacent launches:
- TIANHUI 4A (NORAD 50572)
- TJS-9 (NORAD 50574)
- XW-3 (CAS-9) (NORAD 50466)
- ZY-1 02E (NORAD 50465)
- SHIYAN-12 02 (SY-12 02) (NORAD 50322)
- SHIYAN-12 01 (SY-12 01) (NORAD 50321)
Browse the Other Active Satellites directory or the full satellite directory · What is a TLE? · WatchSat live globe