urn:nasa:pds:context:telescope:las_campanas.ireneedupont_2m5 1.2 1.22.0.0 Product_Context 2026-07-07 1.2 Removed duplicate Internal_Reference entries from Reference_List. 2025-01-07 1.1 Updated schema version. Adding missing "investigation" references. Adding missing "telescope" references. 2021-11-05 1.0 Initial version produced by RMS Node urn:nasa:pds:context:facility:observatory.las_campanas telescope_to_facility urn:nasa:pds:context:investigation:observing_campaign.earth-based-uranus-stellar-occultations telescope_to_investigation urn:nasa:pds:context:instrument:multi-host.generic_insp_hsp telescope_to_instrument 2.5 289.29605 -29.00739 2300 The Irénée du Pont 2.5-meter Telescope, located at Las Campanas Observatory in Chile, has been operational since 1977 and is managed by the Carnegie Institution for Science. As a Ritchey-Chrétien reflector, it supports a wide range of astronomical research, including stellar spectroscopy and supernova observations. Notably, it serves as the southern hemisphere platform for the APOGEE-2 survey, part of the Sloan Digital Sky Survey, enabling detailed studies of the Milky Way's structure and evolution.