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USA 173

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USA 173 is classified as:


NORAD ID: 28095
Int'l Code: 2003-054A
Perigee: 857.3 km
Apogee: 1,365.4 km
Inclination: 63.4 °
Period: 107.4 minutes
Semi major axis: 7482 km
RCS: Unknown
Launch date: December 2, 2003
Source: United States (US)
Launch site: AIR FORCE WESTERN TEST RANGE (AFWTR)

USA 173 is an American military satellite (operated by the National Reconnaissance Office) that was launched by an Atlas 2AS rocket from Vandenberg AFB at 10:04 UT on 2 December 2003. It is reported to be part of the NOSS (Naval Ocean Surveillance System) fleet.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 28095U 03054A   18224.05341312 0.00000050  00000-0  63911-4 0    04
2 28095  63.4186 317.4104 0339500 358.3065   1.6934 13.41365756    08
Source of the keplerian elements: McCants