USA 55

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10-day predictions
USA 55 is classified as:

• Military

NORAD ID: 20547
Int'l Code: 1990-028B
Perigee: 440.1 km
Apogee: 556.0 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   21110.45454722  .00000695  00000-0  25948-4 0  9997
2 20547  94.1025 179.0526 0084396  57.0976 303.8353 15.24963207713493

Source of the keplerian elements: AFSPC