About USA 81
Group: 3 satellites
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Live Position
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Upcoming Passes
Altitude History
Altitude vs Time
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Two-Line Element Set
1 21949U 92023A 26006.20541006 .00000272 00000-0 93333-4 0 9999
2 21949 85.0092 167.4663 0001257 113.3994 246.7331 14.32338784 85843
Epoch: Jan 6, 2026 •
Age: 20 hours
Current Status
Altitude 807.0 km
Velocity 7.45 km/s
Sub-Earth Point -58.12°S,
118.79°W
Launch Date Apr 25, 1992
Age 33.7 years
Type military
Technical Details
Classification Payload
Mass 1450.00 kg
Dry Mass 1200.00 kg
Total Mass 1450.00 kg
Length 0.50 m
Diameter 1.00 m
Span 10.00 m
Shape Cyl + Ant
Manufacturer LMSC
Bus Type NRO-T2
Phase Status In Orbit
Owner/State NRO/US
Large Constellations
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