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NAVSTAR 55 (USA 178)
NavigationMEOUnited States
NAVSTAR 55 (USA 178) is a navigation operated by United States, currently in medium Earth orbit near 19,765 km. It completes one orbit of Earth roughly every 718 minutes at an inclination of 54.9°. It was launched in 2004. Track its live position and see when it passes over your location on azmth.
Orbital data
- NORAD ID
- 28361
- COSPAR ID
- 2004-023A
- Type
- Navigation
- Orbit
- MEO
- Perigee (lowest)
- 19,765 km
- Apogee (highest)
- 20,615 km
- Inclination
- 54.86°
- Orbital period
- 718 min
- Launch year
- 2004
- Operator
- United States
Orbital data from CelesTrak, refreshed every 2 hours. Element epoch: 2026-06-05.
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.
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