NAVSTAR 55 (USA 178)

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NAVSTAR 55 (USA 178) is classified as:

Global Positioning System (GPS) Constellation

NORAD ID: 28361

Int'l Code: 2004-023A

Perigee: 19,789.5 km

Apogee: 20,590.8 km

Inclination: 54.5 °

Period: 718.0 minutes

Semi major axis: 26561 km

RCS: 3.1622 m² (large)

Launch date: June 23, 2004
Source: United States (US)
Launch site: AIR FORCE EASTERN TEST RANGE (AFETR)

NAVSTAR 55, also known as USA 178, and as GPS 2R-12, is an American navigational satellite in the GPS fleet that was launched from Cape Canaveral by a Delta 2 rocket at 22:54 UT on 23 June 2004. The 2.1 tonne satellite will soon be manuevered into Slot 4 in Plane F to replace the aging GPS 2A-16 that was launched in November 1992. (GPS 2A-16 will however be repositioned in the same Plane as a backup, till its failue.

1 28361U 04023A   24328.52093897  .00000046  00000-0  00000+0 0  9990
2 28361  54.5068 109.8082 0150834 285.2758 257.9039  2.00554609149613

Source of the keplerian elements: AFSPC