NGC 104, 47 Tuc
Globular Cluster NGC 104 (47 Tuc), class III,
Discovered by Lacaille on September 14, 1751.
- 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
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
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 aaoepp.aao.gov.au)
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
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
Original Chandra Press Release -
[MW Globulars] |