Messier 9 also known as NGC 6333, is a magnitude 8.4 globular cluster located approximately 28.500 light years away in the constellation Ophiuchus.  It was discovered by Charles Messier in 1764.

http://en.wikipedia.org/wiki/Messier_9

 

ABOUT THE IMAGE

DATE/TIME:  The evening of May 30th, 2014.

CAMERA:  Canon XSI, 450Da

TELESCOPE:  Celestron C9.25 SCT @ F/10

MOUNT:  Celestron CGE Pro

ISO SETTING:  800

EXPOSURES:  10

EXPOSURE LENGTH:  300sec.

TOTAL EXPOSURE LENGTH:  50min.

SUBTRACTIONS:  16 darkframes, 40flat frames, 16darkflat frames

CAPTURE SOFTWARE:  MaximDL

STACKING SOFTWARE:  Deep Sky Stacker

PROCESSING:  Photoshop CS3

 

 

 

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