NAVSTAR 55 (USA 178)
NORAD 28361· COSPAR 2004-023A· Navigation· MEO
Launch
Launched on Jun 23, 2004 from Space Launch Complex 17B, United States of America aboard a Delta II 7925-9.5.
Delta II | GPS IIR-12 →Live · TLE epoch 2026-09-07 21:38 UTC
Orbit class
MEO — Medium Earth (2,000–30,000 km, e.g. GPS / Galileo)
Operator
US Space Force
Country
United States
Manufacturer
Lockheed Martin
Launched
Jun 23, 2004
Mass
—
Apogee
20,611 km
Perigee
19,768 km
Inclination
54.92°
Period
11.97 h
Altitude history
Apogee and perigee for NAVSTAR 55 (USA 178) across 14 days of archived orbital elements (15 element sets, one per day).
Trend
Stable
Change
-0.0 km
Rate
-0.00 km/day
Now
19768 × 20611 km
Apogee Perigee
Derived from our own archive of CelesTrak orbital elements, sampled every 3 hours. Short windows show drag and station-keeping; they are not a reentry prediction.
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