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USA 173

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USA 173 is classified as:


NORAD ID: 28095
Int'l Code: 2003-054A
Perigee: 676.0 km
Apogee: 1,542.2 km
Inclination: 63.4 °
Period: 107.3 minutes
Semi major axis: 7480 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   25264.79685137 0.00000000  00000-0  00000-0 0    04
2 28095  63.3913 143.0212 0578973   6.1770 353.7692 13.41963130    00
Source of the keplerian elements: McCants