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USA 75

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USA 75 is classified as:


NORAD ID: 21805
Int'l Code: 1991-080B
Perigee: 35,779.7 km
Apogee: 35,808.8 km
Inclination: 15.0 °
Period: 1,436.1 minutes
Semi major axis: 42165 km
RCS: Unknown
Launch date: November 24, 1991
Source: United States (US)
Launch site: AIR FORCE EASTERN TEST RANGE (AFETR)

Infrared sensors to detect heat from missile and booster plumes against earth's background; detection capability of smaller missiles; improved warning of attack by short-range missiles against U.S. and allied forces.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 21805U 91080B   16212.45730935 0.00000000  00000-0  00000-0 0    05
2 21805  14.9684  16.5150 0003453 336.7586  23.2274  1.00270000    01
Source of the keplerian elements: McCants

N2YO: 939