USA 55

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10-day predictions
USA 55 is classified as:

• Military

NORAD ID: 20547
Int'l Code: 1990-028B
Perigee: 417.9 km
Apogee: 510.9 km
Inclination: 94.1 °
Period: 93.7 minutes
Semi major axis: 6835 km
RCS: 0.1768 m² (medium)
Launch date: April 5, 1990
Source: United States (US)
Launch site: AIR FORCE WESTERN TEST RANGE (AFWTR)

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1 20547U 90028B   24348.04802333  .00006218  00000-0  16363-3 0  9990
2 20547  94.0854 194.2508 0068038  84.5979 276.3029 15.36246085916506

Source of the keplerian elements: AFSPC