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USA 57

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USA 57 is classified as:


NORAD ID: 20561
Int'l Code: 1990-031B
Perigee: 612.9 km
Apogee: 706.6 km
Inclination: 89.8 °
Period: 97.8 minutes
Semi major axis: 7030 km
RCS: Unknown
Launch date: April 11, 1990
Source: United States (US)
Launch site: AIR FORCE WESTERN TEST RANGE (AFWTR)
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 20561U 90031B   25190.74188472  .00000454  00000-0  66236-4 0  9995
2 20561  89.8460 271.3605 0066694 187.7828 172.2364 14.72655106 64751
Source of the keplerian elements: AFSPC