Imaging telescopes or lenses: EdgeHD 8
Imaging cameras: Atik 460EX Mono
Mounts: Astro-Physics Mach1GTO
Guiding telescopes or lenses: EdgeHD 8
Guiding cameras: Lodestar X2
Focal reducers: Celestron EdgeHD 0.7x
Software: PixInsight 1.8 · Craig Stark Nebulosity 3
Filters: Astrodon 5nm SII · Astrodon 5nm H-alpha · Astrodon 5nm Olll
Accessory: QHYCCD OFF AXIS GUIDER
Dates:July 6, 2017 , July 12, 2017 , July 13, 2017 , July 14, 2017
Frames:
Astrodon 5nm H-alpha: 15x600" 0C bin 1x1
Astrodon 5nm Olll: 15x600" 0C bin 1x1
Astrodon 5nm SII: 15x600" 0C bin 1x1
Integration: 7.5 hours
Avg. Moon age: 17.21 days
Avg. Moon phase: 84.88%
Bortle Dark-Sky Scale: 6.00
Astrometry.net job: 1682928
RA center: 19h 59' 37"
DEC center: +22° 43' 22"
Pixel scale: 0.731 arcsec/pixel
Orientation: 165.855 degrees
Field radius: 0.171 degrees
Resolution: 1280x1096
Locations: Home, Seattle, WA, United States
Data source: Backyard
Subject: M27: A planetary nebula in the constellation Vulpecula, located about 1360 light-years from earth.
Capture notes: A straightforward narrowband capture. S-ii was captured over two different nights due to some clouds coming in the first night, but otherwise all lights were taken during a long run of extremely clear summer nights in Seattle (making up for last winter I suppose).
Processing notes: I used tone maps to stretch the individual narrowband channels, combined them into an RGB image and then applied a synthetic luminance made by integrating the original narrowband channels. My main concern with this image is whether I went overboard with deconvolution ... most of the detail can be attributed to applying local histogram equalization to the luminance.
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