USA 81
Launch
Launched on Apr 25, 1992 from Space Launch Complex 4W, United States of America aboard a Titan II SLV.
Titan II SLV | P-11 5105 →Live · TLE epoch 2026-09-08 11:21 UTC
Orbit class
LEO — Low Earth Orbit (circular, < 2,000 km)
Operator
United States Government (classified)
Country
United States
Manufacturer
—
Launched
Apr 25, 1992
Mass
—
Apogee
789 km
Perigee
786 km
Inclination
85.01°
Period
1.67 h
Altitude history
Apogee and perigee for USA 81 across 103 days of archived orbital elements (105 element sets, one per day).
Trend
Stable
Change
-0.1 km
Rate
-0.00 km/day
Now
786 × 789 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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