Víctor M. Blanco Telescope

Coordinates: 30°10′11″S 70°48′24″W / 30.16967°S 70.80653°W / -30.16967; -70.80653
From Wikipedia, the free encyclopedia
Víctor M. Blanco Telescope
4m-Victor M. Blanco Telescope.jpg
Víctor M. Blanco Telescope
Alternative namesVictor M. Blanco Telescope Edit this at Wikidata
Named afterVíctor Manuel Blanco Edit this on Wikidata
Part ofCerro Tololo Inter-American Observatory
Dark Energy Survey Edit this on Wikidata
Location(s)Chile Edit this at Wikidata
Coordinates30°10′11″S 70°48′24″W / 30.16967°S 70.80653°W / -30.16967; -70.80653 Edit this at Wikidata
OrganizationNational Optical Astronomy Observatory Edit this on Wikidata
Altitude2,207 m (7,241 ft) Edit this at Wikidata
Built1974–1976 (1974–1976) Edit this at Wikidata
First light1976 Edit this on Wikidata
Telescope styleRitchey–Chrétien telescope Edit this on Wikidata
Diameter4,022.9 mm (13 ft 2.38 in) Edit this at Wikidata
Collecting area10.014 m2 (107.79 sq ft) Edit this at Wikidata
Enclosurespherical dome Edit this on Wikidata
Websitewww.ctio.noao.edu/noao/content/Victor-Blanco-4-m-Telescope Edit this at Wikidata
Víctor M. Blanco Telescope is located in Chile
Víctor M. Blanco Telescope
Location of Víctor M. Blanco Telescope
  Related media on Commons

The Víctor M. Blanco Telescope, also known as the Blanco 4m, is a 4-metre aperture telescope located at the Cerro Tololo Inter-American Observatory, Chile. Commissioned in 1974 and completed in 1976,[1] the telescope is identical to the Mayall 4m telescope located on Kitt Peak.[2][3][4] In 1995 it was dedicated and named in honour of Puerto Rican astronomer Víctor Manuel Blanco.[5] It was the largest optical telescope in the Southern hemisphere from 1976 until 1998, when the first 8-metre telescope of the ESO Very Large Telescope opened.

Currently the main research instrument used at the telescope is the Dark Energy Camera (DECam), the camera used in the Dark Energy Survey. DECam saw its first light in September 2012.[6][7]

The Mosaic II camera was used at this CTIO 4-m telescope in the southern hemisphere since 1999.[8] This was a development of the KNPO Mosaic camera installed in 1998 in the northern hemisphere.[8] These cameras were used for various astronomical surveys, and were noted for their success.[8]

Largest optical astronomical telescopes in 1976
# Name /
Image Aperture M1
Altitude First
Special advocate
1. BTA-6
(Special Astrophysical Obs)
Big asimutal teleskop.jpg 238 inch
605 cm
26 m2 2,070 m (6,790 ft) 1975 Mstislav Keldysh
2. Hale Telescope
(Palomar Observatory)
P200 Dome Open.jpg 200 inch
508 cm
20 m2 1,713 m (5,620 ft) 1949 George Ellery Hale
3. Mayall Telescope
(Kitt Peak National Obs.)
Kittpeakteliscope.JPG 158 inch
401 cm
10 m2 2,120 m (6,960 ft) 1973 Nicholas Mayall
4. Víctor M. Blanco Telescope
(CTIO Observatory)
4m-Victor M. Blanco Telescope cropped.jpg 158 inch
401 cm
10 m2 2,200 m (7,200 ft) 1976 Nicholas Mayall
5. Anglo-Australian Telescope
(Siding Spring Observatory)
Anglo-Australian Telescope dome.JPG 153 inch
389 cm
12 m2 1,742 m (5,715 ft) 1974 Prince Charles
6. ESO 3.6 m Telescope
(La Silla Observatory)
Wallpaper of 3.6-m Telescope at La Silla.jpg 140 inch
357 cm
8.8 m2 2,400 m (7,900 ft) 1976 Adriaan Blaauw
7. Shane Telescope
(Lick Observatory)
Shane dome.JPG 120 inch
305 cm
~7 m2 1,283 m (4,209 ft) 1959 Nicholas Mayall


See also[edit]


  1. ^ Great Telescopes. (2003). In Atlas of the Universe. Retrieved from http://www.credoreference.com/entry/philipsuniverse/great_telescopes
  2. ^ Freeman, Ira Henry (October 28, 1979). "An Astronomical Journey in Arizona". The New York Times (Late City ed.). p. 377. ISSN 0362-4331.
  3. ^ "Archived copy". Archived from the original on 2011-07-27. Retrieved 2009-10-25.{{cite web}}: CS1 maint: archived copy as title (link)
  4. ^ Gregory, B; Abbott, T (July 22, 2008), The Blanco 4m Telescope, Cerro Tololo Inter-American Observatory
  5. ^ "Brief History of THE CERRO TOLOLO INTER-AMERICAN OBSERVATORY". Archived from the original on 2008-09-07. Retrieved 2008-09-07.
  6. ^ Dark Energy Camera and Dark Energy Survey:photos, videos & graphics fnal.gov
  7. ^ Berkeley Lab sensors enable first light for the dark energy camera phys.org Retrieved 2012-09-18
  8. ^ a b c Dey, Arjun; Valdes, Francisco (2014-03-01). "The Delivered Image Quality with the MOSAIC Cameras at the Kitt Peak 4 m Mayall and Cerro Tololo 4 m Blanco Telescopes". Publications of the Astronomical Society of the Pacific. 126 (937): 296. doi:10.1086/675808. ISSN 1538-3873.
  9. ^ "Explore the Universe Live with Astronomers in Chile". NOIRLab Announcement.