About USA 77
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 21809U 91076E 26011.94307055 .00004097 00000-0 34057-3 0 9998
2 21809 63.2960 214.6043 0899692 71.6795 297.9910 13.55227992 83087
Epoch: Jan 11, 2026 •
Age: 11 hours
Current Status
Altitude 781.6 km
Velocity 7.60 km/s
Sub-Earth Point 33.26°N,
114.33°E
Launch Date Nov 8, 1991
Age 34.1 years
Type military
Technical Details
Classification Payload
Mass 400.00 kg
Dry Mass 400.00 kg
Total Mass 400.00 kg
Length 1.00 m
Diameter 1.00 m
Span 10.00 m
Shape Box + Ant
Manufacturer NRL
Bus Type NOSS B SSU
Phase Status In Orbit
Owner/State NRO/NRL/US
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