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Contains:  Sh2-112
Getting plate-solving status, please wait...


            Joel Shepherd
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Technical card

Dates:July 28, 2019July 29, 2019July 30, 2019July 31, 2019Aug. 6, 2019

Astrodon 5nm H-alpha: 18x600" 0C bin 1x1
Astrodon 5nm Olll: 24x600" 0C bin 1x1
Astrodon 5nm SII: 24x600" 0C bin 1x1
Baader Planetarium B 1.25": 19x180" 0C bin 1x1
Baader Planetarium G 1.25": 20x180" 0C bin 1x1
Baader Planetarium R 1.25": 20x180" 0C bin 1x1

Integration: 13.9 hours

Avg. Moon age: 22.94 days

Avg. Moon phase: 13.49%

Bortle Dark-Sky Scale: 6.00 job: 2925012

RA center: 20h 33' 52"

DEC center: +45° 38' 53"

Pixel scale: 1.416 arcsec/pixel

Orientation: 82.777 degrees

Field radius: 0.400 degrees

Resolution: 1600x1254

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.



Joel Shepherd
License: Attribution Creative Commons

Sky plot

Sky plot




            Joel Shepherd