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I agreeImaging telescope or lens:TEC 140 APO FL
Imaging camera:Atik 460EX Mono
Mount:Astro-Physics Mach1GTO
Guiding camera:Lodestar X2
Software:Sequence Generator Pro, PixInsight 1.8
Filters:Baader Planetarium LRGB CCD 1.25", Astrodon 5nm SII, Astrodon 5nm H-alpha, Astrodon 5nm Olll
Accessory:QHYCCD OFF AXIS GUIDER
Resolution: 1600x1254
Dates:July 28, 2019, July 29, 2019, July 30, 2019, July 31, 2019, Aug. 6, 2019
Frames:
Astrodon 5nm H-alpha: 18x600" bin 1x1
Astrodon 5nm Olll: 24x600" bin 1x1
Astrodon 5nm SII: 24x600" bin 1x1
Baader Planetarium B 1.25": 19x180" bin 1x1
Baader Planetarium G 1.25": 20x180" bin 1x1
Baader Planetarium R 1.25": 20x180" bin 1x1
Integration: 13.9 hours
Avg. Moon age: 22.94 days
Avg. Moon phase: 13.49%
Bortle Dark-Sky Scale: 6.00
Astrometry.net job: 2925012
RA center: 20h 33' 53"
DEC center: +45° 38' 52"
Pixel scale: 1.416 arcsec/pixel
Orientation: 277.318 degrees
Field radius: 0.400
Locations: Home, Seattle, WA, United States
Data source: Backyard
SH2-112 in HS/O/O and RGB stars: in Cygnus, about 6000 light-years distant. I found this a very hard target to process even with 14 hours of data. The background is naturally mottled with gasses, which makes it difficult to pull the S-ii and O-iii channels out without making a complete mess of the background. After four passes at processing it, I finally decided to leave the background as more of a suggestion, at the cost of some variety in color in the nebula itself. I'll come back to this in 6-12 months, after I have a few more processing tricks up my sleeve but I'm reasonably happy with this rendition for now.
| Sharpless2 Objects |
| Narrowband imaging |
| Suburban Astrophotography |
| The refractors! |
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