NAVSTAR 18 (USA 50)
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About This Satellite
NAVSTAR 18 (USA 50) is a cataloged satellite tracked under NORAD ID 20452 with international designator 90008A. According to the GCAT master catalog, it was built by RWISB, on the GPS II platform, with a launch mass of about 776 kg, with a shape described as Box + 2 Pan. According to the TLE snapshot used when this page was generated (2026-08-18), its MEO orbit had an apogee of about 21.243 km and a perigee near 21.165 km, with an inclination of 54.87° and a period of roughly 759.5 minutes; at apogee its speed was about 3.80 km/s. Positions on this page are near-real-time SGP4 predictions propagated from the latest two-line element (TLE) data.
In the TLE snapshot used to generate this page, NAVSTAR 18 (USA 50)'s apogee was 21.243 km, where its speed was about 3.80 km/s, completing about 1.9 orbits of Earth per day. Track it live on the map above or in the JOT orbital map.