IAC80 Telescope

The telescope

Latitude: 28º 17' 58.8" N Longitude: 16º 30' 39.7" W Altitude: 2381.25m

The IAC80 telescope, setted for observations in the optical, was fully designed and built by the Instituto de Astrofísica de Canarias (IAC) and it was the first of its class developed in Spain. In 1980 the IAC started its development and was finally installed at the OT in 1991. This telescope has an equatorial german mount, with an effective focal ratio of f/11.3, effective focal length of 9.02 m and a primary mirror of diameter 82 cm. The instrumentation is installed at its Cassegrain primary focus.

The IAC80 telescope is an ideal telescope for long-term programmes, collaborations with other telescopes, urgent observations in service or ToO observation modes, student practices and observational or instrumental test-bed. IAC80 is a key part of the Teide Observatory because of its versatility and availibity.


Technical Data

The current common instruments at the IAC80 telescope are CAMELOT (‘CAmara MEjorada LIgera del Observatorio del Teide’) and TCP (Tromsoe CCD Photometer). CAMELOT is a wide field camera, with 2 048×2 048 pixels of 13.5×13.5 microns/pixel and 0.304 arcsec/pixel, with a 10.6 arcmin FOV. This detector has two readout channels and is sensitive in all the optical range. CAMELOT uses a close-cycle cooling system to reach -105ºC. The TCP is a portable photometer optimized for high-speed readout based in CCD technology. It was built by the Astrophysics Department in Tromsoe University (Norway) in collaboration with CUO (Copenhagen University Observatory).   

Four parking positions limits

North +84º 00′ Dec Z = 56
South -40º 00′ Dec Z = 68.5
East -5h 11m HA Z = 68
West +5h 13m HA Z = 68


Primary mirror Secondary mirror
Dimensions Dxh = 819.88 x 139.29 mm Dimensions Dxh = 222.64 x 38.98 mm
Weight P = 162.38 kg Weight P = 4.05 kg
Curvature Radius R = 4 782.28 mm Optical radius R = 1 705.71 mm
Outer diameter De = 819.88 mm Outer diameter De = 222.73 mm
Effective diameter Dp = 800 mm Effective diameter Ds = 220.50 mm
Geometric focal (R/2) fp = 2 391.14 mm Central thickness Ec = 38.989 mm
Relative aperture (fp/Dp) f/D = 2.988 Outer thickness Ee = 35 mm
Conic constante Cp = -1.00 (parábola) Focal length L = 856.854 mm
Material CER-VIT glass ceramic Geometric focal fs = 852.85 mm
Expansion coefficient Co < 1.5 x 10-7/ºC Aperture A = 209.8 mm
Birefringence due to stress Less than 10 mm/cm Conic constant Cs = -2.963 mm
Inlays and bubbles Less than 0.05% of the mirror surface Material CER-VIT glass ceramic
    Expansion coefficient Co < 1.5 x 10-7/ºC
    Birrefringence due to stress Less than 10mm/cm
    Inlays and bubles Less than 0.05% of the mirror surface
    Surface Convex hyperboloid


  • CAMELOT. Wide field camera (10.4″x10.4″) for direct image. Filter wheel with 12 positions.
  • TCP. CCD for fast differential photometry using windows system. Instant data reduction, light curves production and Fourier transforms.
  • MERLIN. Future spectrograph with SGS autoguiding, adaptative optics system AO-L and CCD.