Sh2-174
in HOO+RGB - Two Processings
The above image was composed using the NBRGBCombine script in
PixInsight. H-Alpha assigned to the Red channel at 100% and the OIII
added to the Green and Blue at 50%.
Below
is a newer style blending using the Foraxx script available in
PixInsight. In this case the Ha and OIII were combined into a
Narrowband image using the Foraxx script then the
Foraxx produced stars were added to the image using the pixel math
formula to restore stars to starless images. I find this approach a
distant second to the above but show it for
those who'd appreciate seeing the comparison.
Images above are 25% of the original. Click on an image to see it at
50%.
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From Dean Salman's www.sharplesscatalog.com:
Sh2-174 ranks as the most northern Sharpless objects at 81 degrees
north. Sh2-178 very close to Polaris is most likely part of the
galactic dust cloud above is just to the north of Sh2-174.
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Scope: Planewave Instruments 12.5" CDK F/8
Camera: Apogee U16M with Astrodon Gen II LRGB filters
Mount: Paramount ME
46 x 20 minutes in H-Alpha
34 x 20 minutes in OIII
12/14/16 x 10 minutes of R/G/B
Lucknow, Ontario, Canada
September 2024
Images acquired using TSX and CCD-Commander
Bulk of processing in PixInsight then finishing touches in Photoshop CC
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