The Hobby-Eberly Telescope (HET) is a revolutionary large telescope of 9.2 meter aperture, located in West Texas at McDonald Observatory. HET has been constructed by a consortium of US and German universities for about 16 million dollars. First light was obtained on December 11, 1996, HET was dedicate don October 8, 1997, and early scientific operations started on October 8, 1999. The HET operates with a fixed segmented primary and has a tracker which moves the four-mirror corrector and prime focus instrument package to track the sidereal and non-sidereal motions of objects. Here we describe the current performance of the HET relative to its goals.
Gary J. Hill, Gary J. Hill,
"Hobby-Eberly Telescope: instrumentation and current performance", Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000); doi: 10.1117/12.395510; https://doi.org/10.1117/12.395510