USA 21

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USA 21 is classified as:

• Military

NORAD ID: 17506
Int'l Code: 1987-015A
Perigee: 391.4 km
Apogee: 39,925.5 km
Inclination: 62.8 °
Period: 716.7 minutes
Semi major axis: 26529 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   24133.89893678  .00001431  00000-0  10215-2 0  9991
2 17506  62.7970  14.9737 7450991 272.3730  12.6153  2.00914159 35380

Source of the keplerian elements: AFSPC