urn:nasa:pds:context:telescope:mcdonald.struve2m1 1.1 1.16.0.0 Product_Context 2021-12-07 1.1 Added lid_ref to instrument molp 2016-03-03 1.0 Initial version exported from OLAF urn:nasa:pds:context:facility:observatory.mcdonald telescope_to_facility McDonald Observatory (OLAF observatory code 445) urn:nasa:pds:context:instrument:mcdonald.struve2m1.molp telescope_to_instrument 2.1 255.977745 30.671583 2069 Unknown The 2.1-m Struve Warner & Swasey reflector is a 2.1 m telescope located at 30.671583, 255.977745 at the McDonald Observatory. Instrument Host Overview ======================== McDonald Observatory Otto Struve 2.1m (82in) 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. Telecsopes 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 ===================== Otto Struve optical telescope Primary Mirror Diameter: 2.08m (82 in) Focal Length: 8.13m (26.7 ft) f-ratio: 3.90 Field Angle: 63.5 arcmin Plate Scale: 25.4 arcsec/mm The telescope has two focal points: Cassegrain Coude f/13.7 f/22.9 Focal Length 28.53m/96.6ft 47.70m/156.5ft f-ratio 13.65 22.9 Field Angle 20 arcmin ---- Plate Scale 7.25 arcsec/mm 4.3 arcsec/mm The Coude focus is not presently in use.