The Whirlpool Galaxy (M51)

Posted by llpastro
on Saturday, April 18, 2009

by Larry Phillips


Images were taken between March 19 and 30, 2009.  I use an Astro-Physics 140 refractor telescope at 140mm f7.5, an SBIG ST-2000XM camera with a CFW-10 color filter wheel and off-axis guiding.  This is a total of 15 hours exposure using 10 minute L,R,G,B subs. Imaging was done from my backyard in Sahaurita, Arizona just south of Tucson.  I use CCDCommander to automate my imaging, CCDStack to do calibration and stacking, Photoshop CS4 with Neat Image to process.

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