Sh2-119 Ha+SII+OIII+RGB
The
above image was done in PixInsight using the Foraxx script to get a
starless Narrowband image then layering over that the RGB image.
Tweaked in Photoshop.
Next up is a version done in PixInsight using the NBRGBCombine script plus some tweaks in Photoshop:
Yet
another way to do this would be to bring the starless Ha, SII and OIII
images into Photoshop, compose a starless SHO image and layer in the
RGB there. That looks like this:
Lastly,
one can take the pure RGB image then layer on top of that the three NB
images and assign them to the colours we want them to hit. H-Alpha into
Red 100% and to Blue 15%. SII into Green 100% and OIII into Blue 100%.
All using Lighten blend mode. That looks like this:
and to reconnect us with reality, here is the pure RGB image:
Sharpless 119
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This object is very strong in H-Alpha.
From Walter Koprolin: " Sharpless
119 is a large patch of emission nebulosity in Cygnus, about 3 degrees
east of the North American Nebula, located around the bright
5th-magnitude star 68 Cygni (near the image center).
It shows up quite easily in well-exposed wide-angle photographs of the
region as large red patch of emission nebulosity. S. Sharpless, in his
famous "Catalogue of H II Regions", published in 1959, indeed describes
it as type 3, "bright". Interestingly, there are several dark lanes and
dark globules superimposed on the southern part of the nebula. The area
is part of the Milky Way and well populated by numerous stars. "
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Camera: Moravian G4 (16803ccd) w Astrodon Gen II filters
Scope: AP155 EDF F/7 w Robofocus
Mount: Paramount MX
19 x 20 min H-Alpha; 20 x 20 min OIII and SII
12/12/14 x 10 min each RGB
Acquired with TSX using CCD-Commander automation
Processed in PixInsight and Photoshop.
Lucknow, Ontario
Sept 2025
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