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USA 55

retiredleo

Live LEO tracker

Browse UNCLASSIFIED

Identification

NORAD / COSPAR: 20547 / 1990-028B
Constellation: UNCLASSIFIED
Object type: PAYLOAD
Country / owner: United States
Operator: Various

Launch

Launch date: 05 Apr 1990
Launch site: N/A
Launch vehicle: N/A
Decay date: In orbit

Orbital parameters

Period: 93.18 min
Inclination: 94.10°
Apoapsis: 467 km
Periapsis: 394 km
Mean altitude: 430 km
Semi-major axis: 6801 km
Eccentricity: 0.00538

Live state

Latitude: —
Longitude: —
Altitude: —
Velocity: —
Footprint area: —

TrackingLive tracker

TLE epoch: 10/22/2026, 6:53:43 PM
Source: Space-Track

1 20547U 90028B   26295.78730877  .00007281  00000-0  14502-3 0  9991
2 20547  94.1011 215.5001 0053766   5.1679 355.0120 15.45367014 21561