urn:nasa:pds:context:telescope:mcdonald.harlanjsmith_2m7 1.1 1.16.0.0 Product_Context urn:nasa:pds:context:telescope:mcdonald.smith2m7 2023-02-01 1.1 Added instruments :multi-host.generic_insp_hsp and :mcdonald.harlanjsmith_2m7.lcs 2021-11-06 1.0 Revised version produced by RMS Node, including LID, Title, and Reference List urn:nasa:pds:context:facility:observatory.mcdonald telescope_to_facility McDonald Observatory (OLAF observatory code 445) urn:nasa:pds:context:instrument:mcdonald.harlanjsmith_2m7.p45a_phot telescope_to_instrument urn:nasa:pds:context:instrument:multi-host.generic_insp_hsp telescope_to_instrument urn:nasa:pds:context:instrument:mcdonald.harlanjsmith_2m7.lcs telescope_to_instrument 2.72 255.978439 30.671583 2075 Geodetic - North American (1927) Datum The 2.7m Telescope is a 2.72 m telescope located at 30.671583, 255.978439 at the McDonald Observatory. Instrument Host Overview ======================== McDonald Observatory Harlan J. Smith 2.7m (107in) Telescope The information included here was extracted from the McDonald Observatory web site at: http://mcdonaldobservatory.org/ on 24 April 2002 by A.C.Raugh. Observatory Information ======================= McDonald Observatory is administered by the University of Texas at Austin. Telescopes are located on Mt. Locke in the Davis Mountains of West Texas. East longitude: -104 01.3 Latitude: +30 40.3 Elevation: 2075 meters above sea level Telescope Information ===================== Harlan J. Smith optical telescope Primary Mirror Diameter: 2.72m (107 in) Focal Length: 10.68m ( 35 ft) f-ratio: 3.93 The telescope has three focal points: Cassegrain f/8.8 Cassegrain Coude Ritchey-Chretien f/17.7 f/32.5 Focal Length 23.91m/78.4ft 47.98m/157.4ft 88.43m/290.1ft f-ratio 8.8 17.65 32.54 Field Angle 61.5 arcmin 31 arcmin 3 arcmin Plate Scale 8.62 arcsec/mm 4.29 arcsec/mm 2.32 arcsec/mm