M71 open cluster

 

M71, also designated NGC 6838, is a globular cluster in the constellation Sagitta.  It was discovered by Phillipe Loys de Cheseaux in 1746, and included by Charles Messier in his catalogue of comet-like objects in 1780.  M71 lies at a distance of about 12,000 light-years from Earth and has a diameter of about 27 light-years.

http://en.wikipedia.org/wiki/Messier_71

 

ABOUT THIS IMAGE

DATE/TIME:  Taken on the evening of June 21st 2009

CAMERA:  Canon XSI, 450D

TELESCOPE:  Orion 100mm ED refractor @ F/9

ISO SETTING:  800

EXPOSURES:  24

EXPOSURE LENGTH:  300sec

TOTAL EXPOSURE LENGTH:  2hrs

CAPTURE SOFTWARE:  MaximDL

STACKING SOFTWARE:  Deep Sky Stacker

PROCESSING:  Photoshop CS3

 

 

 

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