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William Shaheen | all galleries >> Astronomy - Astronomical objects, images and astronomy related projects >> Astro Images by Subject > M51 - The Whirpool Galaxy 27 & 28-Apr-2009
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M51 - The Whirpool Galaxy 27 & 28-Apr-2009

8 - 10 min. exposures at Gain 1, Offset 100. TEC-140 (980mm, f/7) and no focal reducer, yielding 980mm, f/7 and an image scale of 1.64 arc-seconds/pixel; Q453HR color CCD camera. No darks, no bias frames and no flat frames applied. Post processing: Bad Pixel Map in Nebulosity2; DDP in ImagesPlus 3.75. Color balance and curves in Nebulosity2. Image cropped from 3040 x 2016 to 1277 x 977.

20090427-28_M51-SuperComb-DDP-crv-adjcr.jpg


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