Carlsberg Meridian Telescope

The Carlsberg Meridian Telescope (formerly the Carlsberg Automatic Meridian Circle) is a decommissioned meridian circle telescope located at the Roque de los Muchachos Observatory in the Canary Islands. It was dedicated to high-precision optical astrometry and operated from May 1984 to September 2013.^[1]

Carlsberg Meridian Telescope

Part of Roque de los Muchachos Observatory. The Carlsberg Meridian Telescope is housed in the low building on the bottom left.
Location(s)	Spain
Coordinates	28°45′36″N 17°52′57″W
First light	May 1984
Decommissioned	1 September 2013
Telescope style	refracting telescope
Diameter	17.8 cm (7.0 in)
Focal length	266 cm (8 ft 9 in)
Website	www.ast.cam.ac.uk/ioa/research/cmt/
Location of Carlsberg Meridian Telescope

The CMT's 20 years of photometric data was studied to understand atmosphere extinction.^[2] Up to 2003, 11 catalogs were published and it had been given various upgrades since its installation in 1984.^[3]

The telescope is owned by the Danish Copenhagen University Observatory and was jointly operated under an international agreement with the Institute of Astronomy, Cambridge and the Real Instituto y Observatorio de la Armada.^[3]