GRANTECAN S.A. is a public company that was founded in 1994 for the design and construction of the 10.4m Gran Telescopio CANARIAS, or GTC, located at the Roque de los Muchachos Observatory on the island of La Palma. In 2009, with the start of the scientific operational phase of the telescope, the company evolved its responsibility to include the operation of the telescope as a service to the wider scientific community.

Currently, GRANTECAN S.A. employs approximately 70 full-time staff. The company comprises 4 groups: administration, engineering operation, science operation, and development division. Its Director is Dr Romano Corradi. A full organization chart of GRANTECAN S.A. can be retrieved here.

The GTC project is actively supported by the Spanish Government and the Regional Government of the Canary Islands through the European Funds for Regional Development (FEDER) provided by the European Union. The project also includes the participation of the Mexican Instituto de Astronomía de la Universidad Nacional Autónoma de México (IA-UNAM) and the Instituto Nacional de Astrofísica, Óptica y Electrónica, and from the United States through participation of the University of Florida.

Apart from the telescope site at the observatory, the company's main location is in the Center for Astrophysics in La Palma (CALP), in Breña Baja, La Palma. The Developments Division is located on the premises of the Instituto de Astrofísica de Canarias in La Laguna, Tenerife.


icon Contact details


Gran Telescopio de Canarias, S.A.
Center for Astrophysics in La Palma
Cuesta de San José, s/n
38712 - Breña Baja
S/C de Tenerife
Gran Telescopio de Canarias, S.A.
Instituto de Astrofísica de Canarias
C/ Vía Láctea, S/N
38205 - San Cristóbal de La Laguna
S/C de Tenerife
Telephone: +34 922 425 720 Telephone: +34 922 315 031
Fax: +34 922 425 725 Fax: +34 922 315 032
e-mail: gtc [at] e-mail: gtc [at]
Directions on how to get to CALP can be found here. VAT No. ESA38354460


Gran Telescopio de Canarias
Observatorio del Roque de los Muchachos
38783 - Garafía
S/C de Tenerife
Telephone: +34 922 405 600
Fax: +34 922 405 603
e-mail: gtc [at]


icon Key contact points


contact telephone email @
Romano Corradi -
922 425 720 ext: 727
922 315 031 ext: 599
Lourdes González Rodríguez -
Head of Administration
922 425 720 ext: 721
922 315 031 ext: 525
Antonio Cabrera Lavers -
Head of Science Operations
922 425 720 ext: 747 antonio.cabrera
Javier Castro -
Head of Developments Division
922 315 031 ext: 597 javier.castro.lopez
Luis Rodríguez García -
Head of Engineering Operations
922 425 720 ext: 734 luis.rodriguez
GTC Control Room 922 425 720 ext: 259 / 269 / 258


icon Public visits to the telescope


Casual visits to the GTC at night are not possible. However, in daytime group visits by schools, amateur astronomical societies and similar parties with a particular interest in the GTC can be organized.

The Roque de Los Muchachos Observatory runs a regular visits program to some of the telescopes through the “Instituto de Astrófísica de Canarias (IAC)” website. For booking online and more information please visit Visits to the Observatorio del Roque de Los Muchachos.


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Last modified: 12 December 2022

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