urn:nasa:pds:context:telescope:mcdonald.harlanjsmith_2m7 1.3 1.22.0.0 Product_Context urn:nasa:pds:context:telescope:mcdonald.smith2m7 2026-07-07 1.3 Removed duplicate Internal_Reference entries from Reference_List. 2025-01-07 1.2 Updated schema version. Adding missing "investigation" references. Adding missing "telescope" references. 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 urn:nasa:pds:context:investigation:observing_campaign.earth-based-uranus-stellar-occultations telescope_to_investigation 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 Harlan J. Smith 2.7-meter Telescope is a prominent optical telescope located at McDonald Observatory in West Texas. Completed in 1968, it was the third-largest telescope in the world at the time and remains a key instrument for astronomical research. The telescope is equipped with multiple focal points, including Cassegrain, Ritchey-Chrétien, and Coudé configurations, and supports a variety of instruments such as the George and Cynthia Mitchell Spectrograph (GCMS) and the Visible Integral-field Replicable Unit Spectrograph-W (VIRUS-W). Notably, it has contributed to significant discoveries, including the detection of a supermassive black hole in the Leo 1 dwarf galaxy. McDonald Observatory+2