USA 55

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10-day predictions
USA 55 is classified as:

• Military

NORAD ID: 20547
Int'l Code: 1990-028B
Perigee: 441.3 km
Apogee: 558.3 km
Inclination: 94.1 °
Period: 94.5 minutes
Semi major axis: 6870 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   19048.91753191 +.00000246 +00000-0 +98250-5 0  9996
2 20547 094.1046 104.1144 0085157 137.7123 223.0731 15.24380374592741

Source of the keplerian elements: AFSPC