USA 55

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10-day predictions
USA 55 is classified as:

• Military

NORAD ID: 20547
Int'l Code: 1990-028B
Perigee: 439.5 km
Apogee: 555.4 km
Inclination: 94.1 °
Period: 94.4 minutes
Semi major axis: 6868 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   21290.89959295  .00000852  00000-0  31433-4 0  9990
2 20547  94.0969 277.9940 0084440 100.6586 260.4182 15.25157182740990

Source of the keplerian elements: AFSPC