M13 - Hercules Cluster
 
Date:
 
April 26, 2014
 
Location:
 
Deerlick Astronomy Village
Sharon, Georgia USA
Telescope:
 
Orion ED80 Apo
 
Camera:
 
Canon 450D DSLR
 
Mount:
 
Orion Atlas EQ-G
 
Acquisition:
 
Nebulosity
 
Filters:
 
None
 
Total Integration:
 
1.25 hours
 
Subexposures:
 
15 x 300s @ ISO 1600
 
Calibration:
 
None
 
The Hercules Cluster (also known as M13, NGC 6205 and sometimes called the Great Globular Cluster in Hercules) is a globular cluster of about 300,000 stars in the constellation Hercules.

With an apparent magnitude of 5.8, it is barely visible with the naked eye on a very clear night. Its diameter is about 23 arc minutes and it is readily viewable in small telescopes. Nearby is NGC 6207, a 12th magnitude edge-on galaxy that lies 28 arc minutes directly north east (to the right in this image).