USA 21

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USA 21 is classified as:

• Military

NORAD ID: 17506
Int'l Code: 1987-015A
Perigee: 619.6 km
Apogee: 39,725.4 km
Inclination: 62.6 °
Period: 717.3 minutes
Semi major axis: 26543 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   23152.48803015  .00001083  00000-0 -36357-2 0  9991
2 17506  62.6433  70.8085 7366375 268.5845  14.4836  2.00755049 28422

Source of the keplerian elements: AFSPC