USA 55

retiredleo

NORAD / COSPAR20547 / 1990-028B

ConstellationUNCLASSIFIED

Object typePAYLOAD

Country / ownerUnited States

OperatorVarious

Launch date05 Apr 1990

Launch siteN/A

Launch vehicleN/A

Decay dateIn orbit

Period93.21 min

Inclination94.10°

Apoapsis469 km

Periapsis394 km

Mean altitude432 km

Semi-major axis6803 km

Eccentricity0.00546

Latitude—

Longitude—

Altitude—

Velocity—

Footprint area—

TLE epoch9/8/2026, 1:15:55 PM

SourceSpace-Track

1 20547U 90028B   26251.55272779  .00004977  00000-0  10071-3 0  9996
2 20547  94.0960 190.4828 0054617 169.5975 190.6425 15.44911878 14735