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NAVSTAR 57 (USA 183) — Live Satellite Tracking (NORAD 28874)
Track NAVSTAR 57 (USA 183) (NORAD catalog number 28874) 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 has been on orbit since 2005, launched on the 38th orbital launch of that year (COSPAR designation 2005-038A). As of this element set it had completed roughly 15,345 revolutions of Earth.
Moving at about 3.92 km/s, NAVSTAR 57 (USA 183) operates in medium Earth orbit at roughly 19,848–20,532 km altitude, taking about 12.0 hours per revolution (2.01 orbits a day). The orbit is essentially circular (eccentricity 0.0129). Inclined 54.8° to the equator, it overflies every latitude up to about 55° north and south. Its orbital plane crosses the equator northbound at right ascension 269.9°.
Orbital elements
| Orbit regime | medium Earth orbit (MEO) |
|---|---|
| Perigee × apogee altitude | ~19,848 km × 20,532 km |
| Inclination | 54.82° |
| Orbital period | 718.0 min (2.01 rev/day) |
| Eccentricity | 0.01287 |
| Element set epoch | 2026-09-06 |
| COSPAR designation | 2005-038A |
| NORAD catalog number | 28874 |
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 Navigation group
NAVSTAR 57 (USA 183) is part of the US GPS (NAVSTAR) fleet — one of 173 global-navigation satellites in the WatchSat catalog across GPS, GLONASS, Galileo and BeiDou. GNSS spacecraft broadcast precise time signals from orbits around 20,000 km up; a phone fixes its position by comparing several of them at once. See the whole navigation group live in 3D.
Can you see NAVSTAR 57 (USA 183) from the ground?
Not with the naked eye. At its altitude NAVSTAR 57 (USA 183) is far beyond unaided visibility — following satellites this high takes a telescope and good timing. You can still track it precisely in the live 3D view above, or check pass predictions for your location.
Related satellites
Nearest catalog neighbors of NAVSTAR 57 (USA 183) in the Navigation group — usually craft from the same or adjacent launches:
- NAVSTAR 56 (USA 180) (NORAD 28474)
- NAVSTAR 55 (USA 178) (NORAD 28361)
- NAVSTAR 58 (USA 190) (NORAD 29486)
- NAVSTAR 54 (USA 177) (NORAD 28190)
- NAVSTAR 59 (USA 192) (NORAD 29601)
- NAVSTAR 53 (USA 175) (NORAD 28129)
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