NAVSTAR 53 (USA 175)

NavigationMilitaryMEOUnited States

NAVSTAR 53 (USA 175) is a navigation satellite, with ownership listed as United States in CelesTrak's catalogue, currently in medium Earth orbit near 20,906 km. It completes one orbit of Earth roughly every 747 minutes at an inclination of 55.1°. It was launched in 2003. Track its live position and see when it passes over your location on azmth.

Orbital data

NORAD ID: 28129
COSPAR ID: 2003-058A
Type: Navigation
Orbit: MEO
Perigee (lowest): 20,906 km
Apogee (highest): 20,913 km
Inclination: 55.09°
Orbital period: 747 min
Launch year: 2003
Owner (CelesTrak): United States

Orbital data updated: 2026-10-17 · from CelesTrak, refreshed every 2 hours.

Who operates it

United StatesLIVEMission ended 18 Jan 2022

Navigation

GCAT lists it as GPS IIR-10.

Independent assessment

GCAT classes it as a military satellite for navigation and records its mission as ended on 18 Jan 2022 (17 Oct 2026).

Data: GCAT · CC BY 4.0 Class, mission and status adapted from GCAT by Jonathan McDowell, CC BY 4.0, data update 17 Oct 2026.

Military satellites, counted and explained →

About MEO orbit

Medium Earth Orbit. Between 2,000 and 35,786 km. Home to navigation constellations like GPS (~20,200 km), Galileo, and BeiDou. Orbital period 2 to 24 hours.