Nordic Optical Telescope

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Nordic Optical Telescope
Nordic Optical Telescope near sunset.jpg
The building of the Nordic Optical Telescope near the time of sunset.
Organization NOT Council
Location La Palma, Canary Islands
Coordinates 28°45′26″N 17°53′06″W / 28.75722°N 17.88500°W / 28.75722; -17.88500Coordinates: 28°45′26″N 17°53′06″W / 28.75722°N 17.88500°W / 28.75722; -17.88500
Altitude 2,382 metres (7,815 ft)[1]
Wavelength Optical / infrared
Built 1988
Telescope style Ritchey-Chretien reflector
Diameter 2.56 metres (101 in)
Focal length 2.816m
Mounting alt/az
Dome Half sphere
The interior of the telescope, showing an instrument on the Cassegrain focus.

The Nordic Optical Telescope (NOT) is an astronomical telescope located at Roque de los Muchachos Observatory, La Palma in the Canary Islands. First light came in 1988, with regular observing beginning in 1990. It is funded by Denmark, Sweden, Iceland, Norway and Finland. Access is provided to astronomers of all nationalities through international time allocation committees.

The NOT was the first major telescope facility designed to use active optics to correct the shape of a thin, lightweight primary mirror supported on actuators. The main mirror has a diameter of 2.56 metres (101 in).



  1. ^ "Technical Details of the Telescope". Retrieved 11 December 2010. 

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