NAVSTAR 46 (USA 145)

NavigationMilitaryMEOUnited States

NAVSTAR 46 (USA 145) is a navigation satellite, with ownership listed as United States in CelesTrak's catalogue, currently in medium Earth orbit near 19,915 km. It completes one orbit of Earth roughly every 718 minutes at an inclination of 51.4°. It was launched in 1999. Track its live position and see when it passes over your location on azmth.

Orbital data

NORAD ID: 25933
COSPAR ID: 1999-055A
Type: Navigation
Orbit: MEO
Perigee (lowest): 19,915 km
Apogee (highest): 20,465 km
Inclination: 51.35°
Orbital period: 718 min
Launch year: 1999
Owner (CelesTrak): United States

Orbital data updated: 2026-10-18 · from CelesTrak, refreshed every 2 hours.

Who operates it

United StatesLIVEMission ended 10 Nov 2020, still transmitting

Navigation

GCAT lists it as GPS IIR-3.

Independent assessment

GCAT classes it as a military satellite for navigation and records its mission as ended on 10 Nov 2020, though it still transmits (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.