NGC 104 (Caldwell 106) or 47 Tucanae
NGC 104 or Caldwell 106 (also known as the 47 Tucanae) is a globular cluster in the constellation Tucana. It has an apparent visual magnitude of 4.0 and its angular diameter is 31 arc-minutes. NGC 104 lies at an estimated distance of 14,700 light years. The Equinox 2000 coordinates are 00h 24.1m, -72° 05´ which makes NGC 104 a Southern Hemisphere object that is best seen during the autumn. The Caldwell Autumn Star Chart shows the position of all Caldwell objects visible during that season. Visit the Caldwell Catalog Photo Gallery to see more objects from this catalog. As one of the more famous objects in the Caldwell Catalog, it is commonly known as the 47 Tucanae.
The image to the right is a 2x enlargement of the top image. 47 Tucanae is located about 2° west of the Small Magellanic Cloud. It roams the halo of our Milky Way Galaxy along with some 200 other globular clusters. The dense core of 47 Tucanae is made up of several million stars in a volume only about 120 light-years across. See Wikipedia for more details.
- Object: NGC 104
- Other Names: Caldwell 106, 47 Tucanae
- Object Type: globular cluster
- Object Data: Apparent Magnitude = 4.0, Angular Size = 31 arc-minutes
- Object Position (Equinox 2000): 00h 24.1m, -72° 05´, Constellation = Tucana
- Date/Time: 2011 Jun 02 at 08:44 UTC
- Location: Hotel Inca Utama, Huatajata, Lake Titicaca, BOLIVIA
- Mount: Celestron CG-5 GT
- Lens: Nikkor AF 300 f/2.8
- Camera: Canon EOS 550D (Rebel T2i)
- Field of View: 4.3° x 2.8° at 3.0 arc-sec/pixel (web version: 16.6 arc-sec/pixel)
- Exposure: 2 x 240s, f/2.8, IE800
- File Name: NGC104-01w.jpg
- Processing (Adobe Camera Raw): Vignetting Correction, Noise Reduction, White Balance, Curves
- Processing (Photoshop CS5): Average Images, Curves
- Original Image Size: 3454 × 5179 pixels (17.9 MP); 11.5" x 17.3" @ 300 dpi
- Rights: Copyright 2012 by Fred Espenak. All Rights Reserved. See: Image Licensing.