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YAOGAN-31 04B — Live Satellite Tracking (NORAD 47856)
Track YAOGAN-31 04B (NORAD catalog number 47856) 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 C of 2021's 20th orbital launch (COSPAR designation 2021-020C). It went up together with 2 other satellites from that launch still in the active catalog. As of this element set it had completed roughly 26,945 revolutions of Earth.
Moving at about 7.44 km/s, YAOGAN-31 04B flies in low Earth orbit at an altitude of roughly 960 × 1,232 km, completing one revolution every 107.0 minutes — about 13.5 trips around Earth per day. The orbit is essentially circular (eccentricity 0.0182). Inclined 63.4° to the equator, it overflies every latitude up to about 63° north and south. Its orbital plane crosses the equator northbound at right ascension 47.8°. Earth's equatorial bulge drifts that plane westward about 2.57° per day.
Orbital elements
| Orbit regime | low Earth orbit (LEO) |
|---|---|
| Perigee × apogee altitude | ~960 km × 1,232 km |
| Inclination | 63.41° |
| Orbital period | 107.0 min (13.45 rev/day) |
| Eccentricity | 0.01818 |
| Element set epoch | 2026-09-07 |
| COSPAR designation | 2021-020C |
| NORAD catalog number | 47856 |
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
YAOGAN-31 04B 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 YAOGAN-31 04B from the ground?
Sometimes. Like most low-Earth-orbit spacecraft, YAOGAN-31 04B 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 YAOGAN-31 04B in the Other Active Satellites group — usually craft from the same or adjacent launches:
- YAOGAN-31 04C (NORAD 47857)
- YAOGAN-31 04A (NORAD 47854)
- SHIYAN-9 (SY-9) (NORAD 47851)
- CAS500-1 (NORAD 47932)
- GRUS-1C (NORAD 47933)
- GRUS-1B (NORAD 47934)
Browse the Other Active Satellites directory or the full satellite directory · What is a TLE? · WatchSat live globe