United States Naval Observatory Flagstaff Station

United States Naval Observatory Flagstaff Station
Alternative namesNOFS
OrganizationUnited States Naval Observatory
Observatory code 689 
LocationCoconino County, near Flagstaff, Arizona
Coordinates35°11′03″N 111°44′26″W / 35.18417°N 111.74056°W / 35.18417; -111.74056
Altitude2,273 m (7,457 ft)
Established1955
WebsiteUnited States Naval Observatory's Flagstaff Station
Telescopes
Kaj Strand Telescope1.55 m (61 in) reflector
DFM/Kodak/Corning1.3 m reflector
Unnamed telescope1.0 m (40 in) Ritchey–Chrétien reflector
Flagstaff Astrometric Scanning Transit Telescope8-inch (20 cm) catadioptric
Navy Precision Optical Interferometerinterferometer (Located at Anderson Mesa)
Location of United States Naval Observatory Flagstaff Station
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The United States Naval Observatory Flagstaff Station (NOFS), is an astronomical observatory near Flagstaff, Arizona, US. It is the national dark-sky observing facility under the United States Naval Observatory (USNO). NOFS and USNO combine as the Celestial Reference Frame manager for the U.S. Secretary of Defense.