University of Tokyo Atacama Observatory

University of Tokyo Atacama Observatory (TAO)
Looking east towards Cerro Chajnantor, site of TAO
OrganizationUniversity of Tokyo
LocationCerro Chajnantor, Atacama Desert, Chile
Coordinates22°59′12″S 67°44′32″W / 22.98667°S 67.74222°W / -22.98667; -67.74222
Altitude5,640 m (18,500 ft)
Established2009
Websitehttp://www.ioa.s.u-tokyo.ac.jp/TAO/
(English translation)
Telescopes
miniTAO1m optical-infrared
(under construction)6.5m optical-infrared
University of Tokyo Atacama Observatory is located in Chile
University of Tokyo Atacama Observatory
Location of University of Tokyo Atacama Observatory (TAO)

The University of Tokyo Atacama Observatory (TAO) is an astronomical observatory located on the summit of Cerro Chajnantor, at an altitude of 5,640 m (18,500 ft) within a lava dome in the Atacama Desert of northern Chile.[1] The site is located less than 5 km (3.1 mi) north-northeast of the Llano de Chajnantor Observatory, where the Atacama Large Millimeter Array (ALMA) is located, but is over 580 m (1,900 ft) higher in elevation. It is also 28 m (92 ft) higher than the site proposed for the Fred Young Submillimeter Telescope on the same peak. The observatory is operated by the Graduate School of Science and Faculty of Science, University of Tokyo. Operation began in 2024.[2]

The observatory operates the TAO 6.5m 6.5 m (260 in) optical-infrared telescope at the site.[3] The high altitude of the observatory is essential for its mission, as infrared light is absorbed by water vapor in the atmosphere, so it must be located at high altitude where the atmosphere is thin. In 2023, TAO was noted as one of the few major telescopes in the world with light pollution below acceptable levels of interference.[4]

  1. ^ Cite error: The named reference TAOPR was invoked but never defined (see the help page).
  2. ^ Banks, Michael (2024-05-01). "World's highest observatory begins operations in Chile". Physics World. Retrieved 2024-05-02.
  3. ^ Cite error: The named reference TAOPROJ was invoked but never defined (see the help page).
  4. ^ Falchi, Fabio; Ramos, Felipe; Bará, Salvador; Sanhueza, Pedro; Jaque Arancibia, Marcelo; Damke, Guillermo; Cinzano, Pierantonio (16 December 2022). "Light pollution indicators for all the major astronomical observatories". Monthly Notices of the Royal Astronomical Society. 519 (1): 26–33. doi:10.1093/mnras/stac2929.