urn:nasa:pds:context:telescope:eso-la_silla.ntt 1.0 1.16.0.0 Product_Context urn:nasa:pds:context:telescope:eso.ntt 2021-12-07 1.0 per RMS, deprecated eso in favor of eso-la_silla urn:nasa:pds:context:facility:observatory.eso-la_silla telescope_to_facility European Southern Observatory (OLAF observatory code 56) urn:nasa:pds:context:instrument:eso-la_silla.ntt.efosc2 telescope_to_instrument urn:nasa:pds:context:instrument:eso-la_silla.ntt.eso_multi telescope_to_instrument urn:nasa:pds:context:instrument:eso-la_silla.ntt.eso_rild telescope_to_instrument urn:nasa:pds:context:instrument:eso-la_silla.ntt.sofi telescope_to_instrument 3.58 289.268258 -29.255122 2375 Unknown The New Technology Telescope (NTT) is a 3.58 m telescope located at -29.255122, 289.268258 at the European Southern Observatory. The ESO New Technology Telescope (NTT) is an Alt-Az, 3.58m Richey-Chretien telescope which pioneered the use of active optics. The NTT first light happened in 1989.