Cygnus Wall | A Portion of NGC 7000 (Kevin Morefield)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg)

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Cygnus Wall | A Portion of NGC 7000

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Cygnus Wall | A Portion of NGC 7000

I initially framed this up to just fit my FOV in a single frame. But some initial stacks revealed and interesting dark lane curving over the right side of the wall so I expanded to a two panel mosaic. This just extended the view by 20-30% in the end, but framed the object better.

After struggling to get the panels to match up seamlessly, I wound up manually joining the data in CCDStack by painstakingly matching histograms of the left and right panels and then manually adding rejection randomly along the seam. It worked but there must be a better way. (I tried following PI mosaic workflow and failed yet again. Cheers to you mosaic experts out there - you are better men than me!

After the mosaic battle I spent a couple of weeks tilting at the narrowband mix windmill and settled on this:

Luminance = Ha

Red = 50% Ha + 50% SII

Green = 45% SII + 10% Ha + 45% OIII

Blue = 100% OIII - Ha/8

Nebula processed starless with StarNet++ to remove stars. Sharpening and Deconvolution in CCDStack. Cosmetic Correction, Star Alignment, and Image Integration in PI. Noise Reduction with Topaz. Curves, Color Adjustments, and High Pass filter in Photoshop CC.

Original
B
C
Final
D

B

Description: Contrast

Uploaded: ...

C

Description: Color, contrast adjustments made with a mask to separate the effect on shadows vs highlights

Uploaded: ...

D

Description: Curves and color adjustments. Added contrast.

Uploaded: ...

Narrowband imaging
QHY Users Group

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Status	Advanced success
Started	...
Astrometry.net job	4000372
PixInsight job	5XRAXD7SGITTB9OKJGGTHP30B7OS43O5
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h59m29s.820
RA (top/left)	21h01m28s.409
RA (top/right)	20h56m14s.394
RA (bottom/right)	20h57m31s.575
RA (bottom/left)	21h02m43s.646

Dec (center)	+43°38′34″.74
Dec (top/left)	+44°06′29″.30
Dec (top/right)	+43°39′34″.49
Dec (bottom/right)	+43°10′32″.91
Dec (bottom/left)	+43°37′14″.73

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Cygnus Wall | A Portion of NGC 7000

Cygnus Wall | A Portion of NGC 7000

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Cygnus Wall | A Portion of NGC 7000

Cygnus Wall | A Portion of NGC 7000

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D

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