Southern African Large Telescope
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| Organisation |
South African Astronomical Observatory 
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| Location(s) |
Sutherland, Northern Cape , South Africa
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| Coordinates | 32°22′34″S 20°48′38″E / 32.376005555556°S 20.810677777778°ECoordinates: 32°22′34″S 20°48′38″E / 32.376005555556°S 20.810677777778°E |
| Altitude | 1,798 m (5,899 ft) |
| Wavelength | 320–1700 nm |
| Built | 2005 |
| Telescope style |
reflecting telescope
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| Diameter | hexagonal array of ~11.1 x ~9.8 m |
| Angular resolution | EE(50) ≤ 0.6” |
| Collecting area | 91 x 0.87 m2 = 79 m2 |
| Mounting | 45 ton steel structure |
| Enclosure | 25 m spherical |
| Website | www |
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The Southern African Large Telescope (SALT) is a 10-metre class optical telescope designed mainly for spectroscopy. It consists of 91 hexagonal mirror segments each with a 1-metre inscribed diameter, resulting in a total hexagonal mirror of 11.1 m by 9.8 m. It is located close to the town of Sutherland in the semi-desert region of the Karoo, South Africa. It is a facility of the South African Astronomical Observatory, the national optical observatory of South Africa.
SALT is the largest optical telescope in the southern hemisphere. It enables imaging, spectroscopic, and polarimetric analysis of the radiation from astronomical objects out of reach of northern hemisphere telescopes. It was originally planned to be a copy of the Hobby-Eberly Telescope (HET) at McDonald Observatory, but while adapting the construction plans, significant changes were introduced to its design, especially to the spherical aberration corrector. The main driver for these changes were desired improvements to the telescope's field of view.
First light with the full mirror was declared on 1 September 2005, with 1 arc second resolution images of globular cluster 47 Tucanae, open cluster NGC 6152, spiral galaxy NGC 6744, and the Lagoon Nebula being obtained. The official opening by President Thabo Mbeki took place during the inauguration ceremony on 10 November 2005.
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Wikipedia