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William Shaheen | all galleries >> Astronomy - Astronomical objects, images and astronomy related projects >> APOD Submissions > M17 - The Swan Nebula 28-Mar-2015
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M17 - The Swan Nebula 28-Mar-2015

Distance: 5,000 - 6,000 ly, in the constellation Sagittarius.

Telescope configuration: Celestron EdgeHD 1400 with the Celestron 0.7x focal reducer (fl=2737, f/7.7).
Camera: Canon EOS 6D unbinned, IR modified, ambient temperature ~60F. 5 - 6 minute exposures at ISO 1600. Image scale: 0.49 arc-sec/pixel (resized to 0.99 arc-sec/pixel). Image capture ImagesPlus 5.75 Camera Control.
Mount: Software Bisque Paramount MX with PEC and ProTrack enabled. Autoguided with an SBIG Sti autoguider, a Celestron OAG (off-axis guider) and a Starlight Xpress AOLF (Adaptive Optics Large Format) device using PHD2 autoguiding software, with dithering.
Post processing: ImagesPlus 6.0: Calibration, alignment, stacking using 0 dark frames, 7 bias frames and 7 flat frames, DDP, color balance, sharpening - Multi Resolution Sharpening. Curves in Nebulosity3. Cropped and resized to 50pct in ThumbsPlus7.

20150328_M17_CombExcAvg-IPall-NEBcrv-TPadj.jpg


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