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Contains:  NGC 6910, gamma Cyg nebula, IC 1318, The star Sadr (γCyg)
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Sh2-108 (Gamma Cygni) - SHO, 


            Joel Shepherd
Sh2-108 (Gamma Cygni) - SHO

Sh2-108 (Gamma Cygni) - SHO

Technical card

Resolution: 1600x1249

Dates:July 10, 2018July 11, 2018July 12, 2018

Astrodon 1.25" 3nm SII: 18x600" bin 1x1
Astrodon 3nm OIII 1.25: 20x600" bin 1x1
Astrodon 5nm H-alpha: 21x600" bin 1x1

Integration: 9.8 hours

Avg. Moon age: 27.64 days

Avg. Moon phase: 4.89%

Bortle Dark-Sky Scale: 6.00 job: 2183502

RA center: 305.555 degrees

DEC center: 40.252 degrees

Pixel scale: 3.863 arcsec/pixel

Orientation: 35.621 degrees

Field radius: 1.089 degrees

Locations: Home, Seattle, WA, United States

Data source: Backyard


Sh2-108 in SHO (Hubble) Palette. I had a heck of time settling on a color mapping for this ... the H-a is overwhelming but doesn't reveal much in the way of interesting structure. The combination I landed on was:
R: 1;.3*S2 + 0.1*Ha
G: 0.7*Ha
B: 1.0*O3 + 0.05*Ha

So, a touch of Ha added to the R and B channels, and toned down Ha for the G channel. Some of the remaining magenta was pushed towards blue or simply desaturated, but I didn't want to eliminate all of it ... it's what the data was saying. Gamma Cygni itself is a tough star to deal with. Anyway, feedback on colors, etc., would be welcomed.



Joel Shepherd
License: Attribution Creative Commons

Sky plot

Sky plot


Sh2-108 (Gamma Cygni) - SHO, 


            Joel Shepherd