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I agreeImaging telescope or lens:RCOS 14.5"
Imaging camera:SBIG STX 16803
Mount:Paramount-ME
Software:Adobe Lightroom CC, PixInsight for Mac
Filters:BAADER H Alpha 7nm, Astrodon RGB, Astrodon S-ii, Astrodon O-iii
Resolution: 3030x2880
Dates:May 1, 2017, July 6, 2017, Nov. 20, 2017, Nov. 21, 2017
Frames:
Astrodon 5nm Halpha: 26x1200" -25C bin 1x1
Astrodon RGB: 45x900" -25C bin 1x1
Astrodon O-iii: 15x1200" -25C bin 1x1
Astrodon S-ii: 48x1200" -25C bin 1x1
Integration: 40.9 hours
Avg. Moon age: 5.63 days
Avg. Moon phase: 34.37%
Astrometry.net job: 1881702
RA center: 19h 59' 34"
DEC center: +22° 42' 28"
Pixel scale: 0.550 arcsec/pixel
Orientation: 284.220 degrees
Field radius: 0.320
Locations: Deep Sky West, Rowe, New Mexico, United States
M 27, commonly known as the Dumbbell Nebula, is the first planetary nebula ever discovered, and perhaps the finest and most beautiful in the sky.
This is a (SHO)(RS)GO Combination, yes, luminance is SHO, and R=S, G=G, and B=max(B, O). S looks quite similar to R, and has a more rich fish scale like texture; O has some faint skirt around the nebula body. Combination of SHO correctly represented the lightness of the color image.
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