MAUNA KEA OBSERVATORY 3.0-M NASA INFRARED TELESCOPE FACILITY (IRTF) ========================================== Instrument Host Overview ======================== The NASA Infrared Telescope Facility is a 3.0-meter equatorial-mount telescope located near the summit of Mauna Kea on the island of Hawaii. Optimized for infrared observations, the NASA IRTF utilizes a f/37 Cassegrain focus that produces an image scale of 1.84 arcsec / mm over an unvignetted field-of-view approximately 2 arcminutes in diameter. Location ======== The observatory location data given here are geodetic latitude and east longitude, based on values from the Astronomical Almanac, 1989. The geocentric site radius was determined using the MERIT 1983 earth figure, equatorial radius = 6378.137 km and flattening of the reference spheroid = 1/298.257. Latitude: 19.829 Degrees Longitude: -155.475 Degrees Earth radius at observatory: 6379.9 Kilometers Altitude: 4168.1 Meters GROUP = OBSERVATORY_PARAMETERS OBSERVATORY_ID = 'OBS376' NAME = 'MAUNA KEA OBSERVATORY' COUNTRY = 'USA' ADDRESS = 'University of Hawaii; Institute for Astronomy; 2680 Woodlawn Drive; Honolulu, Oahu, Hawaii' END_GROUP = OBSERVATORY_PARAMETERS GROUP = TELESCOPE_PARAMETERS TELESCOPE_ID = 'T3' NAME = '3.0-M NASA INFRARED TELESCOPE FACILITY (IRTF)' APERTURE = 3.0 LONGITUDE = -155.472000 /* -155 28 19.20 E */ LATITUDE = 19.826223 /* +19 49 34.4 */ ALTITUDE = 4168 COORDINATE_TYPE = 'Aerial survey - North American (1983) datum' END_GROUP = TELESCOPE_PARAMETERS