Navigation
NAVSTAR 55 (USA 178)
Backup / standbyNavigationMEO
Broadcasts precise timing/positioning signals for global navigation (GNSS).
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Launch
- Launch date
- June 23, 2004 at 10:54 PM UTC
- Launch site
- Cape Canaveral SFS, USA
- Launched by
- Delta II 7925-9.5 →
- Operator
- United States Air Force
- Mission
- GPS IIR-12
- Launch record
- View full launch →
Orbit
- Orbit regime
- MEO
- Apoapsis
- 20,608 km
- Periapsis
- 19,758 km
- Inclination
- 54.86°
- Orbital period
- 718 min
Identity
- COSPAR (Int'l)
- 2004-023A
- NORAD catalog №
- 28361
- Object type
- Payload
- Owner / operator
United States- Radar cross-section
- 3.2117 m²
- Status
- Backup / standby