El Leoncito Astronomical Complex

Dome of the Jorge Sahade Telescope at CASLEO
Alternative names	CASLEO
Organization	National Scientific and Technical Research Council
Observatory code	829
Location	San Juan Province, Argentina
Coordinates	31°47′55″S69°17′44″W / 31.7986°S 69.2956°W /-31.7986; -69.2956
Altitude	2,483 metres (8,146 ft)
Established	1983 (1983)
Website	El Leoncito Astronomical Complex
Telescopes
Jorge Sahade Telescope 2.2 m reflector Solar Submillimeter Telescope 1.5 m radio telescope Helen Sawyer Hogg Telescope 0.6 m reflector Astrograph for the Southern Hemisphere 0.5 m reflector Horacio Ghielmetti Telescope 0.4 m reflector
Location of El Leoncito Astronomical Complex
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[edit on Wikidata]

TheEl Leoncito Astronomical Complex (Spanish: Complejo Astronómico El Leoncito - CASLEO) is anastronomicalobservatory in theSan Juan Province ofArgentina. CASLEO is one of two observatories located withinEl Leoncito National Park, which is in a part of the country which rarely sees cloud cover. The other facility in the park is the Carlos U. Cesco Astronomical Station of theFélix Aguilar Observatory.^[1] CASLEO was established in 1983 by an agreement betweenNational Scientific and Technical Research Council (CONICET) of Argentina, the Ministry of Science, Technology and Innovation (MINCYT) of Argentina, theNational University of San Juan (UNSJ), theNational University of La Plata (UNLP), and theNational University of Córdoba (UNC).^[2] The facility was dedicated in 1986 and regular observations began in 1987.

CASLEO's telescopes are located in two separate areas within the El Leoncito Park. The Jorge Sahade and Submillimeter telescopes are at the main site on the edge of the Pampa de la Ciénaga del Medio, along with support facilities. The Helen Sawyer Hogg telescope, Ghielimetti telescope, and theAstrograph for the Southern Hemisphere are located on Cerro Burek, approximately 1.6 km (1 mi) to the northeast and 85 m (279 ft) higher. Separating the areas is the Arroyo El Leoncito, which flows west into the Barreal Blanco in the Pampa de El Leoncito. The driving distance between the two sites is approximately 7 km (4.3 mi).^[3]

• The 2.15 m (85 in) Jorge Sahade Telescope (JS) is a Ritchey-Chrètien reflecting telescope built byBoller & Chivens. The 40-ton telescope is supported by anequatorial mount.^[4] It was installed in 1984 and began regular operations in 1987.^[5] It was originally purchased by UNLP in the 1960s.^[2]
• The 1.5 m (59 in)Solar Submillimeter Telescope (SST) is a solar radio telescope design to observesolar flares at two wavelengths in thesubmillimeter range. It is a partnership of CASLEO and the Mackenzie Center for RadioAstronomy and Astrophysics of Brazil. Several other organizations have also participated. The SST was installed in 1999 and began routine operations in 2001.^[6]
• The 0.61 m (24 in) Helen Sawyer Hogg Telescope (HSHT) is a classicalCassegrain reflector built by Competition Associates and installed in 1971 at theUniversity of Toronto Southern Observatory, which was located atLas Campanas Observatory inChile. In 1997 UTSO was shut down, and the telescope was loaned indefinitely to CASLEO, where it was installed in 1998.^[7] The telescope was dedicated toHelen Sawyer Hogg before it was moved.
• The 0.45 m (18 in) Astrograph for the Southern Hemisphere (ASH) is a reflecting telescope on anequatorial mount. It is a partnership of CASLEO and the Astrophysics Institute of Andalucía.^[8]
• The 0.41 m (16 in) Horacio Ghielmetti Telescope (THG) is a Schmidt-Cassegrain reflector made byMeade Instruments attached to an equatorial mount. It is operated by CASLEO and the Institute of Astronomy and Space Physics of Argentina.^[9]
• The HASTA (H-alpha Solar Telescope of Argentina) for full-disk monitoring of solar H-alpha activity at high resolution.

• 
  Jorge Sahade Telescope

• University of Toronto Southern Observatory
• List of astronomical observatories

• Complejo Astronómico El Leoncito homepage in Spanish
• Consejo Nacional de Investigaciones Científicas y Técnicas in Spanish

• Astronomical observatories in Argentina
• Buildings and structures in San Juan Province, Argentina

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