Bok Telescope

The Bok Telescope (also known as the 90-inch) is the largest telescope operated solely by Steward Observatory. It finds much use from astronomers from University of Arizona, Arizona State University, and Northern Arizona University, with instruments capable of both imaging and spectroscopy. The telescope operates year-round, except during the August summer-shutdown when maintenance is performed while the weather is poor (Arizona's monsoon season lasts from roughly July through August).

Bok Telescope
Alternative namesthe 90-inch
Part ofKitt Peak National Observatory 
Location(s)Arizona
Coordinates31°57′46″N 111°36′00″W
OrganizationSteward Observatory 
Altitude6,900 ft (2,100 m)
First light23 June 1969 
Telescope styleinfrared telescope
optical telescope 
Diameter2.3 m (7 ft 7 in)
Location of Bok Telescope
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