Click here for a high resolution image of M13 (970 KB)

 

 

The Details
Object
M 13 The Great Cluster in Hercules
Optics
Astro-Physics 160 EDF Refractor at f/5.7
Platform
Astro-Physics 1200 GTO
Camera
SBIG ST-10XME
Filters
Tru-Balance LRGB filter set
Date
13 and 14 June 2010
Location
Mount Wilson Observatory, Mount Wilson CA
Exposure
L 30 x 120 sec 1x1 bin; RG 15 ea x 120 sec; B 15 ea x 180 sec
Software
Maxim DL/CCD, , CCDStack, Photoshop CS4
Orientation
Field of view: 53'37" x 36' 07" centered on RA 16h41m45s
DEC +36°27'218". North angle 0.95°; east 90° CCW from north
Notes
This superb example of a globular cluster is about 25000 light years from earth and spans about 140 light years from end to end. Made up of several hundreds of thousands of stars, M13, visible to the naked eye from dark sky sites, is the most impressive globular cluster in the northern sky.

 

 

 

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