Roque de los Muchachos Observatory 2.54-m Isaac Newton Grubb-Parsons Cass. equat. refl. (INT)
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Telescope Name: 2.54-m Isaac Newton Grubb-Parsons Cass. equat. refl. (INT)

Observatory Name: Roque de los Muchachos Observatory

Aperture (m): 2.54

Latitude:   28.762056 /* +28 45 43.4 */

Longitude:  -17.877640 /* -17 52 39.50 E */

Elevation (m): 2336

Telescope Logical Id: urn:nasa:pds:context:telescope:orm.int2m54

Notes: The Isaac Newton Telescope or INT is a 2.54 m (100 in.) optical telescope run by the ING at Roque de los Muchachos Observatory on La Palma in the Canary Islands since 1984.

The La Palma INT is a Cassegrain telescope, with a 2.54 m diameter primary mirror and a focal length of 8.36 m. The f/3.29 Prime focus, used with the Wide Field Camera, allows an unvignetted field of view of 33 arcminutes (approximately 0.3 square degrees). There is also a secondary focal station, the f/15 Cassegrain focus, which possesses a 20 arcminute field of view and is the mount point for the Intermediate Dispersion Spectrograph.

The pointing accuracy of the telescope is around 5 arcseconds, but a sophisticated autoguider, which tracks a given guide star and makes small corrections to the telescope tracking, allows a guiding accuracy of better than an arcsecond on better than 20th magnitude guide stars in support of the typical 0.8-1.5 arcsec seeing at the INT.