USA 57

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USA 57 is classified as:

• Military

NORAD ID: 20561
Int'l Code: 1990-031B
Perigee: 617.4 km
Apogee: 711.5 km
Inclination: 89.8 °
Period: 97.9 minutes
Semi major axis: 7035 km
RCS: Unknown
Launch date: April 11, 1990
Source: United States (US)
Launch site: AIR FORCE WESTERN TEST RANGE (AFWTR)

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1 20561U 90031B   24116.90308862  .00002121  00000-0  33050-3 0  9997
2 20561  89.8374 279.9695 0066880 305.9832  53.5196 14.71175082    72

Source of the keplerian elements: AFSPC