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Contains:  NGC 6914, M 29, NGC 6913, NGC 6910, gamma Cyg nebula, IC 1318, Crescent nebula, NGC 6888, IC 1311, The star 40Cyg, The star Sadr (γCyg), The star 34Cyg
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Sadr Region - HaRGB, 


Sadr Region - HaRGB

Sadr Region - HaRGB

Technical card

Resolution: 2749x2199

Dates:July 27, 2016

Frames: 36x300"

Integration: 3.0 hours

Avg. Moon age: 22.74 days

Avg. Moon phase: 43.74% job: 1203169

RA center: 305.198 degrees

DEC center: 40.248 degrees

Pixel scale: 6.956 arcsec/pixel

Orientation: -89.967 degrees

Field radius: 3.401 degrees

Locations: Mallorca, Son Macia, Mallorca, Spain


The Sadr region, IC 1318, is the busy neighborhood round the mag 2.2 star Sadr or gamma Cygni. It is a large expanse of nebulosity with dominant Ha emission nebulae and various dark nebulae. The Crescent Nebula (in the lower left cover of the image) is embedded into the region.

This is one of my first attempts at combining Ha data with a relatively short RGB exposures for the stars. There was some problem with the blue channel (bloated stars), therefore the RGB data its not great. I am also fighting with the color for the Ha component – a pure RGB red looks somehow wrong, so I mixed a little Ha data into the blue channel in addition. Definitely leaves room for improvement... for now I prefer the mono version.

Using my wide-field setup with the Asahi/Pentax Takumar 135mm f/2.5 with the ATIK 460EXm. Make sure to look at this image in full-size view.



License: None (All rights reserved)

Sky plot

Sky plot


Sadr Region - HaRGB,