M13, also designated NGC 6205, is located in the constellation Hercules. It is commonly called "The Great Cluster in Hercules," and is one of the largest globular cluster's in the night sky.  M13 was discovered by Edmond Halley in 1714, and catalogued by Charles Messier on June 1, 1764.  M13 is about 145 light years in diameter, and is composed of several hundred thousand stars.  With an apparent magnitude of 5.8, M13 is easily viewable in small telescopes or binoculars.

http://en.wikipedia.org/wiki/Messier_13

 

NGC 6207, visually, is a small, magnitude 11.6 galaxy, apparent size being about 3 arc minutes.

 

ABOUT THE IMAGE

DATE/TIME:  Evening of May 5th, 2010.

CAMERA:  Canon XSI, 450D

TELESCOPE:  Orion 100ED @ F/9

ISO SETTING:  1600

EXPOSURES:  40

EXPOSURE LENGTH:  200sec.

TOTAL EXPOSURE LENGTH:  1hr 6min.

SUBTRACTIONS: 20 dark frames and 10 bias frames.

CAPTURE: MaximDL

STACKING/PRE-PROCESSING: Deep Sky Stacker

PROCESSING: Photoshop CS3

 

 

 

 

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