USA 21

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USA 21 is classified as:

• Military

NORAD ID: 17506
Int'l Code: 1987-015A
Perigee: 1,579.6 km
Apogee: 38,785.9 km
Inclination: 62.7 °
Period: 717.7 minutes
Semi major axis: 26553 km
RCS: Unknown
Launch date: February 12, 1987
Source: United States (US)
Launch site: AIR FORCE WESTERN TEST RANGE (AFWTR)

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1 17506U 87015A   19261.78694800 -.00000396 +00000-0 +00000-0 0  9990
2 17506 062.6976 244.8018 7005838 261.8831 020.1547 02.00638547001324

Source of the keplerian elements: AFSPC