USA 21

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USA 21 is classified as:

• Military

NORAD ID: 17506
Int'l Code: 1987-015A
Perigee: 390.9 km
Apogee: 39,924.9 km
Inclination: 62.8 °
Period: 716.7 minutes
Semi major axis: 26528 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   24135.88981695  .00001408  00000-0  82475-3 0  9991
2 17506  62.7990  14.6441 7451110 272.3997  12.6210  2.00920233 35429

Source of the keplerian elements: AFSPC