USA 55

operational
NORAD ID: 20547 Int'l Des: 1990-028 Owner: DARPA/USN Country: US
LEOCIRCULARRETROGRADE

About USA 55

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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 20547U 90028B 26101.27356783 .00005437 00000-0 11496-3 0 9991
2 20547 94.0871 105.7888 0057583 33.8579 326.6330 15.43446709991565
Epoch: Apr 11, 2026 • Age: 6 hours

Current Status

Altitude 401.2 km
Velocity 7.69 km/s
Sub-Earth Point 32.86°N, 69.6°E
Launch Date Apr 5, 1990
Age 36 years
Type military

Technical Details

Classification Payload
Mass 68.00 kg
Dry Mass 68.00 kg
Total Mass 68.00 kg
Length 0.40 m
Diameter 0.40 m
Span 0.40 m
Shape Poly
Manufacturer DSI
Bus Type GLOMR
Phase Status In Orbit
Owner/State DARPA/USN/US

Large Constellations

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