Hobby-Eberly Telescope

(redirected from Spectrographic Survey Telescope)

Hobby–Eberly Telescope

(hob -ee eb -er-lee) (HET) A telescope at the McDonald Observatory in Texas, used mainly for spectrographic surveys. It has an 11-meter segmented spherical mirror (f/1.3, with an effective aperture of 9.2 meters) on an altazimuth mounting, tipped at a permanent angle of 35° to the zenith. A movable secondary mirror reflects images onto it, and in this way it can survey 70% of the sky visible at the site. It was commissioned in 1997.