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William Shaheen | all galleries >> Astronomy - Astronomical objects, images and astronomy related projects >> Astro Images by Subject > M51 - The Whirlpool Galaxy 13-Dec-2012
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M51 - The Whirlpool Galaxy 13-Dec-2012

3 - 5 min. exposures with the SBIG STF-8300M (monochrome) CCD camera at -20C. Baader 2" UV/IR filter. Telescope configuration: EdgeHD 1400 with the Celestron 0.7x focal reducer (fl=2737, f/7.7), unbinned, yielding an image scale of 0.41 arc-seconds/pixel. Mount: Software Bisque Paramount MX. Captured with TSXPro with PEC enabled and ProTrack on. Focused using an AstroZap Bahtinov focus mask. Post processing: Calibration, alignment, stacking in ImagesPlus 5.0 using 9 dark frames, no bias frames and no flat frames (to my shame); DDP and curves in Nebulosity3. One pass of unsharp mask in ThumbsPlus. No autoguiding.



20121213_M51-CombAvg-Nebadj-TPadj.jpg


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Florent Potard26-Mar-2015 18:53
Superb shot of M51! V
Jan Søgaard15-Mar-2015 11:37
Very good picture of a old friend. Bv