NGC 104, 47 Tuc

Globular Cluster NGC 104 (47 Tuc), class III, in Tucana

[NGC 104 image, AAT]

Distance from Sun:
14.7 kly
Distance from Galactic Center:
24.1 kly
Apparent Diameter:
30.9 arc min
3.95 mag vis
Radial Velocity:
-18.0 +/- 0.1 km/s
Abs. Mag:
-9.42 Mag vis
Discovered by Lacaille on September 14, 1751.

First taken for a star, this object was cataloged as 47 Tucanae. Its non-stellar nature was first noticed by Abbe Lacaille during his journey to the Cape of Good Hope, and he included it in his list as a "Nebula," labelled Lac I.1.

The image in this page was obtained by David Malin with the 3.9-meter Anglo-Australian Telescope. This image is copyrighted and may be used for private purpose only. For any other kind of use, including internet mirroring and storing on CD-ROM, please contact the Photo Permissions Department (photo at of the Anglo Australian Observatory.

  • More information on this image (David Malin)

  • Chandra X-ray Observatory image of 47 Tucanae. Visible are stellar X-ray sources resulting close binary stars which probably have formed in lcose encounters of the cluster's member stars. This Chandra image (Obs. ID 953) was taken on March 16, 2000 for 8.9 hours with ACIS. The color is coded by energy: Red 0.5-1.2 keV, Green 1.2-2.5 keV, Blue 2.5-6 keV. The field shown is about 2.5 by 2.5 arc minutes.
    Original Chandra Press Release - photo caption

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