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 2026-10-22 00:56 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
20,612 km
Perigee
19,767 km
Inclination
54.96°
Period
11.97 h
Altitude history
Apogee and perigee for NAVSTAR 55 (USA 178) across 59 days of archived orbital elements (60 element sets, one per day).
Trend
Stable
Change
-0.2 km
Rate
-0.00 km/day
Now
19767 × 20612 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.
Related satellites
Sources & further reading
Embed this satellite on your site
Free for editorial use. Attribution back to LowEarth is required.
<iframe src="https://lowearth.app/embed/28361" width="640" height="400" frameborder="0" allow="fullscreen"></iframe>