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The Jacobus Kapteyn Telescope or JKT is a 1-metre optical telescope named for the Dutch astronomer Jacobus Kapteyn of the Isaac Newton Group of Telescopes at the Roque de los Muchachos Observatory on La Palma in the Canary Islands, Spain.

Jacobus Kapteyn Telescope
The Jacobus Kapteyn Telescope against clouds.jpg
The Jacobus Kapteyn Telescope in 2011 against a background of clouds as the sun rises
Named afterJacobus Kapteyn Edit this on Wikidata
Part ofIsaac Newton Group of Telescopes
Roque de los Muchachos Observatory Edit this on Wikidata
Location(s)La Palma, Spain Edit this at Wikidata
Coordinates28°45′41″N 17°52′41″W / 28.761261°N 17.878114°W / 28.761261; -17.878114Coordinates: 28°45′41″N 17°52′41″W / 28.761261°N 17.878114°W / 28.761261; -17.878114 Edit this at Wikidata
OrganizationInstituto de Astrofísica de Canarias
Isaac Newton Group of Telescopes Edit this on Wikidata
Altitude2,360 m (7,740 ft) Edit this at Wikidata
Built–1983 Edit this on Wikidata (–1983 Edit this on Wikidata) Edit this at Wikidata
First lightMarch 1984 Edit this on Wikidata
Telescope styleOptical telescope
Parabolic reflector
Reflecting telescope Edit this on Wikidata
Diameter1 m (3 ft 3 in) Edit this at Wikidata
MountingEquatorial mount Edit this on Wikidata Edit this at Wikidata Edit this at Wikidata
Jacobus Kapteyn Telescope is located in Canary Islands
Jacobus Kapteyn Telescope
Location of Jacobus Kapteyn Telescope

Funded jointly by the Netherlands and the United Kingdom with planning throughout the 1970s, construction of the JKT was completed in 1983 with the first photographic plate taken in March 1984. It can be used with two different focal points and different instruments, although by 1998 this was refined to one CCD imaging instrument. The telescope weighs nearly 40 metric tons in total.[1]

Being superseded by more recent and larger telescopes, it was taken out of service as a common-user facility as of August 2003.

Since 2014, the telescope is owned by the Instituto de Astrofísica de Canarias (IAC) and operated by the Southeastern Association for Research in Astronomy (SARA)[1] which has retrofitted JKT as a remotely operated observatory (under the internal designation SARA-RM), with the first new observations in this regime in April 2016.

See alsoEdit


  1. ^ a b "The 1.0-m Jacobus Kapteyn Telescope (JKT)". Isaac Newton Group of Telescopes. 8 August 2014.

External linksEdit