USA 55

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10-day predictions
USA 55 is classified as:

• Military

NORAD ID: 20547
Int'l Code: 1990-028B
Perigee: 440.6 km
Apogee: 556.1 km
Inclination: 94.1 °
Period: 94.4 minutes
Semi major axis: 6869 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   21018.84547110  .00000303  00000-0  11831-4 0  9993
2 20547  94.1117 128.6889 0084071  40.0573 320.6831 15.24861762699531

Source of the keplerian elements: AFSPC