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STARLINK-1821 — Live Satellite Tracking (NORAD 46718)
Track STARLINK-1821 (NORAD catalog number 46718) 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 BA of 2020's 73rd orbital launch (COSPAR designation 2020-073BA). It went up together with 2 other satellites from that launch still in the active catalog.
Moving at about 7.71 km/s, STARLINK-1821 flies in low Earth orbit at an altitude of roughly 335 × 341 km, completing one revolution every 91.1 minutes — about 15.8 trips around Earth per day. The orbit is essentially circular (eccentricity 0.0005). Inclined 53.0° to the equator, it overflies every latitude up to about 53° north and south. Its orbital plane crosses the equator northbound at right ascension 214.3°. Earth's equatorial bulge drifts that plane westward about 5.02° per day.
Orbital elements
| Orbit regime | low Earth orbit (LEO) |
|---|---|
| Perigee × apogee altitude | ~335 km × 341 km |
| Inclination | 53.03° |
| Orbital period | 91.1 min (15.80 rev/day) |
| Eccentricity | 0.00051 |
| Element set epoch | 2026-10-21 |
| COSPAR designation | 2020-073BA |
| NORAD catalog number | 46718 |
This page's orbital elements come from the CelesTrak catalog of 2026-10-23. 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 Starlink group
STARLINK-1821 is one of 11,148 SpaceX Starlink broadband satellites in the current WatchSat catalog — the largest satellite constellation ever flown. Its satellites fly in low-Earth-orbit shells, at a median altitude of about 470 km in this catalog. See the whole Starlink constellation move live in 3D.
Can you see STARLINK-1821 from the ground?
Sometimes. Like most low-Earth-orbit spacecraft, STARLINK-1821 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 the “When can I see it?” panel in the live view for when it is above your horizon and sunlit.
Related satellites
Nearest catalog neighbors of STARLINK-1821 in the Starlink group — usually craft from the same or adjacent launches:
- STARLINK-1807 (NORAD 46706)
- STARLINK-1802 (NORAD 46702)
- STARLINK-1730 (NORAD 46563)
- STARLINK-1664 (NORAD 46553)
- STARLINK-1771 (NORAD 46384)
- STARLINK-1661 (NORAD 46355)
Browse the Starlink directory or the full satellite directory.
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