USA 57

retiredleo

NORAD / COSPAR20561 / 1990-031B

ConstellationUNCLASSIFIED

Object typePAYLOAD

Country / ownerUnited States

OperatorVarious

Launch date11 Apr 1990

Launch siteN/A

Launch vehicleN/A

Decay dateIn orbit

Period97.74 min

Inclination89.85°

Apoapsis699 km

Periapsis602 km

Mean altitude651 km

Semi-major axis7022 km

Eccentricity0.00686

Latitude—

Longitude—

Altitude—

Velocity—

Footprint area—

TLE epoch9/8/2026, 1:02:45 PM

SourceSpace-Track

1 20561U 90031B   26251.54358004  .00000435  00000-0  62179-4 0  9993
2 20561  89.8455 263.2524 0068593 121.0273 239.7707 14.73310784127458