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The Galileo National Telescope, (Italian: Telescopio Nazionale Galileo; TNG; code: Z19) is a 3.58-meter Italian telescope, located at the Roque de los Muchachos Observatory on the island of La Palma in the Canary Islands, Spain. The TNG is operated by the "Fundación Galileo Galilei, Fundación Canaria", a non-profit institution, on behalf of the Italian National Institute of Astrophysics (INAF). The telescope saw first light in 1998 and is named after the Italian Renaissance astronomer Galileo Galilei.

Galileo National Telescope
The dome of the Telescopio Nazionale Galileo near time of sunset
Alternative namesTNG
Part ofRoque de los Muchachos Observatory 
Location(s)La Palma, Atlantic Ocean
Coordinates28°45′14″N 17°53′17″W
OrganizationINAF 
Observatory code Z19 
Altitude2,370 m (7,780 ft)
BuiltOctober 1993–June 1996 (October 1993–June 1996)
First light1998 
Telescope styleoptical telescope
Ritchey–Chrétien telescope 
Diameter3.58 m (11 ft 9 in)
Secondary diameter0.875 m (2 ft 10.4 in)
Collecting area12 m2 (130 sq ft)
Focal length38.5 m (126 ft 4 in)
Mountingaltazimuth mount 
Websitewww.tng.iac.es
Location of Galileo National Telescope
  Related media on Commons

Observations at the TNG can be proposed through the Italian Time Allocation Committee (TAC) which assigns, based on the scientific merit of the proposals, 75% of the available time. The rest of the time is at disposal of the Spanish and international astronomical communities. The TNG is open to new proposals two times a year, typically in March–April and September–October.


Technical characteristics


The TNG is an altazimuthal reflecting telescope with a Ritchey-Chretien optical configuration and a flat tertiary mirror feeding two opposite Nasmyth foci. It has a design derived from the New Technology Telescope (NTT), an ESO 4-meters class telescope located in La Silla (Chile). Therefore, the optical quality of the telescope is ensured by an active optics system performing real-time corrections of the optical components and compensating, in particular, for the deformations of the primary mirror, which is too thin to be completely rigid.

The interface between the telescope fork and the instruments at both Nasmyth foci is provided by two rotator/adapters. Their main function is to compensate for the field rotation by a mechanical counter rotation. The best quality of the TNG is that all the available instruments are permanently mounted at the telescope. This guarantees flexibility during an observing session, since it is possible to change instrument during the night with a loss of time limited to a few minutes.

The science based on observational data from the TNG is varied. Proposed observing programs go from the study of the planets and minor bodies of the Solar System up to researches of cosmological interest (e.g. large-scale structure of the Universe and systems of galaxies).


Scientific instruments


The TNG is equipped with five instruments:

Decommissioned instruments:


See also



References





    На других языках


    [de] Telescopio Nazionale Galileo

    Das Telescopio Nazionale Galileo (TNG) ist ein auf dem Roque-de-los-Muchachos-Observatorium auf der Kanareninsel La Palma befindliches astronomisches Teleskop mit 3,58 m Spiegeldurchmesser und Altazimut-Montierung. Der Spiegel ist aus Zerodur-Glaskeramik mit Aluminiumbeschichtung. Das Teleskop hat große Ähnlichkeit mit dem New Technology Telescope der Europäischen Südsternwarte auf La Silla, von dem der Entwurf abgeleitet wurde. Beobachtet wird mit dem TNG seit 1998. Betrieben wird es von der Fundación Galileo Galilei – INAF, Fundación Canaria für das italienische nationale Institut für Astrophysik INAF.
    - [en] Galileo National Telescope

    [es] Telescopio Nazionale Galileo

    El Telescopio Nazionale Galileo, o TNG, es un telescopio italiano de 3,58 metros de diámetro instalado en la isla de La Palma (o, más sencillamente, La Palma), en el archipiélago de las Islas Canarias.



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