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NAVSTAR 55 (USA 178)

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NAVSTAR 55 (USA 178) is classified as:


NORAD ID: 28361
Int'l Code: 2004-023A
Perigee: 19,899.2 km
Apogee: 20,479.9 km
Inclination: 54.2 °
Period: 718.0 minutes
Semi major axis: 26560 km
RCS: 3.1622 m2 (large)
Launch date: June 23, 2004
Source: United States (US)
Launch site: AIR FORCE EASTERN TEST RANGE (AFETR)
PRN: 23

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.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 28361U 04023A   16119.46255462 -.00000005  00000-0  00000+0 0  9996
2 28361  54.2125 236.8774 0109311 212.7703  74.8151  2.00561552 86810
Source of the keplerian elements: AFSPC

N2YO: 363