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USA 173

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USA 173 is classified as:


NORAD ID: 28095
Int'l Code: 2003-054A
Perigee: 787.6 km
Apogee: 1,434.8 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   21090.79167188 0.00000000  00000-0  00000-0 0    08
2 28095  63.4157  15.8673 0432538 359.5453   0.4547 13.41402361    06
Source of the keplerian elements: McCants