Find USA 77
NORAD ID: 21809 • Int'l Des: 1991-076 • Owner: NRO/NRL • Country: US • operational
LEO
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About USA 77
USA 77 (NORAD 21809) is a satellite launched Nov 8, 1991 by NRO/NRL of US. It operates in LEO orbit with a mass of 400.00 kg.
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Two-Line Element Set
1 21809U 91076E 26194.83757368 .00003390 00000-0 26997-3 0 9993
2 21809 63.2966 86.6301 0899232 75.1730 294.7064 13.56698212107883
Epoch: Jul 13, 2026 •
Age: 11 hours
Current Status
Altitude 393.0 km
Apogee / Perigee N/A
Velocity 8.02 km/s
Sub-Earth Point 55.79°N,
95.53°E
Launch Date Nov 8, 1991
Age 34.6 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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