W. M. Keck Observatory

W. M. Keck Observatory
The Keck observatory domes atop Mauna Kea
Alternative namesKeck telescope Edit this at Wikidata
Part ofMauna Kea Observatories Edit this on Wikidata
Location(s)Hawaii
Coordinates19°49′35″N 155°28′28″W / 19.8263°N 155.47441°W / 19.8263; -155.47441 Edit this at Wikidata
Altitude4,145 m (13,599 ft) Edit this at Wikidata
First lightNovember 24, 1990 (1990-11-24), October 23, 1996 (1996-10-23)
Telescope styleastronomical observatory
reflecting telescope Edit this on Wikidata
Number of telescopesEdit this on Wikidata
Diameter10 m (32 ft 10 in) Edit this at Wikidata
Angular resolution0.04 arcsecond, 0.4 arcsecond Edit this on Wikidata
Collecting area76 m2 (820 sq ft) Edit this at Wikidata
Focal length17.5 m (57 ft 5 in) Edit this at Wikidata
Enclosurespherical dome Edit this on Wikidata
Websitekeckobservatory.org Edit this at Wikidata
W. M. Keck Observatory is located in Hawaii
W. M. Keck Observatory
Location of W. M. Keck Observatory
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The W. M. Keck Observatory is an astronomical observatory with two telescopes at an elevation of 4,145 meters (13,600 ft) near the summit of Mauna Kea in the U.S. state of Hawaii. Both telescopes have 10 m (33 ft) aperture primary mirrors, and, when completed in 1993 (Keck I) and 1996 (Keck II), they were the largest optical reflecting telescopes in the world. They have been the third and fourth largest since 2006.