urn:nasa:pds:context:telescope:eso.ntt 0.0 1.7.0.0 Product_Context 2016-03-03 1.0 Initial version exported from OLAF urn:nasa:pds:context:facility:observatory.eso telescope_to_facility European Southern Observatory (OLAF observatory code 56) 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.