UFO 10 (USA 146)
Launch
Launched on Nov 23, 1999 from Launch Complex 36B, United States of America aboard a Atlas IIA.
Atlas IIA | UHF F/O F10 →Live · TLE epoch 2026-10-23 01:39 UTC
Orbit class
GEO — Geostationary (~35,786 km, equatorial)
Operator
United States Government
Country
United States
Manufacturer
—
Launched
Nov 23, 1999
Mass
—
Apogee
35,818 km
Perigee
35,772 km
Inclination
9.96°
Period
23.94 h
Altitude history
Apogee and perigee for UFO 10 (USA 146) across 148 days of archived orbital elements (150 element sets, one per day).
Trend
Stable
Change
-0.7 km
Rate
-0.00 km/day
Now
35770 × 35820 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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