Antilhue - Chile

Messier 72
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Image Data

Designation M 72,  NGC 6981,  Bennett 125
Object type Globular cluster
Coordinates 20 h 54 min    - 12° 32'   Aquarius  (Aqr)
Description M 72 is one of the apparently smaller and fainter globular clusters in Messier's catalog. It is situated in the very western part of constellation Aquarius, close to the inconspicuous group of four stars, M 73.  M 72 is also one of the more remote of Messier's globular clusters:  at about 53.000 light years, it lies a considerable distance beyond the Galactic Center.  It is of 9th or 10th apparent magnitude, with stars ranging magnitude 14 and fainter, but as it is so distant it is one of the more intrinsically luminous globular clusters.  It is not very concentrated, however. 

Click on the image for a higher resolution version.  The field of view is  37 x 25 arcminutes with north towards the top (0°).

Exposure LRGB 50:20:20:20 min @ -20°C ;  all exposures 5 min unbinned
Camera SBIG STL-11000 with Astronomik Type 2 filterset  -  selfguided with AO-L
Optics RCOS 14.5" Ritchey-Chrétien @ f/9 (prime focus)
Mount Astro-Physics AP1200GTO
Software MaxIm DL/CCD,  Sigma Pre Beta 11,  Registar,  Adobe Photoshop CS
Location - Date - Time San Esteban (Chile) - 24Oct2006 @ 01:00 UTC
Conditions Transparency 6/10,  Seeing 5-6/10, Temperature  + 13°C, dew