United States Naval Observatory Flagstaff Station

United States Naval Observatory Flagstaff Station
Alternative names	NOFS
Organization	United States Naval Observatory
Observatory code	689
Location	Coconino County, near Flagstaff, Arizona
Coordinates	35°11′03″N 111°44′26″W / 35.18417°N 111.74056°W
Altitude	2,273 m (7,457 ft)
Established	1955
Website	United States Naval Observatory's Flagstaff Station
Telescopes
Kaj Strand Telescope
Kaj Strand Telescope	1.55 m (61 in) reflector
DFM/Kodak/Corning	1.3 m reflector
Unnamed telescope	1.0 m (40 in) Ritchey–Chrétien reflector
Flagstaff Astrometric Scanning Transit Telescope	8-inch (20 cm) catadioptric
Navy Precision Optical Interferometer	interferometer (Located at Anderson Mesa)
	Location of United States Naval Observatory Flagstaff Station
	Related media on Commons
	[edit on Wikidata]

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).^[1] NOFS and USNO combine as the Celestial Reference Frame^[2] manager for the U.S. Secretary of Defense.^[3]^[4]

^ "The United States Naval Observatory (USNO)". Naval Oceanography Portal. Archived from the original on 31 January 2016. Retrieved 18 February 2016.
^ George H. Kaplan (2000). A Random Walk Through Astrometry (PDF). Sixth DoD Astrometry Forum – 5–6 December 2000 Washington, DC. Archived (PDF) from the original on 19 March 2012. Retrieved 18 February 2016.
^ "The U.S. Naval Observatory: Mission, Products, and Services". Comet MetEd. Archived from the original on 22 July 2013. Retrieved 14 November 2013.
^ M.J. Edwards (29 June 2007). "OPNAV Instruction 9420.1B" (PDF). Archived from the original (PDF) on 22 February 2013. Retrieved 7 May 2012.