California Nebula (NGC 1499) - ForaxX SHO (dswtan)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 46 Per) · 46 ksi Per · California Nebula · IC 2005 · IC 2027 · LBN 752 · LBN 756 · LDN 1456 · LDN 1462 · LDN 1463 · LDN 1464 · LDN 1469 · Menkib · NGC 1499 · Sh2-220 · The star Menkib (ξ Per

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California Nebula (NGC 1499) - ForaxX SHO

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California Nebula (NGC 1499) - ForaxX SHO

Fresh run at this "home" target (I'm in California!) after my original short-stack attempt in Nov 2020 with just 90 mins each in 2-panel mosaic. Now, 28hrs!

I experimented with processing channels individually before combination and not. Maybe obvious with hindsight, but the processing before combination was better for me for fine-tweaking, if slower. I'll probably choose one or the other based on how much time I have in the future.

This SHO uses ForaxX's PixelMath:
R: (Oiii^~Oiii)*Sii + ~(Oiii^~Oiii)*Ha
G: ((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii
B: Oiii

Basic workflow:
LinearFit Ha and SII to OIII
BXT correct only
BXT gentle
NXT gentle
GHS on Ha, EZ Soft Stretch on SII and OIII -- since Ha dominates and needs more care
Combine (PixelMath above)
Bill Blanshan SCNRv4
SXT starless - process RGB stars separately anyway (LinearFit to Green, Combine, GraXpert, BXT correct only, SPCC, NXT, EZ Soft Stretch)
More GHS, for aesthetics
Curves
NXT final
BXT final
LocalHistogramEqualization gentle
DarkStructureEnhance defaults
Combine RGB stars
Bill Blanshan Star Reduction v1 (more aggressive than v2)
+30 Whites in Lightroom for final aesthetics on color-calibrated monitor

Nov 2020 version: https://www.astrobin.com/xo866r/0/

https://en.wikipedia.org/wiki/California_Nebula

Original
Final
B

B

Description: Slightly brighter sky and more stars (BB Star Reduction 2)

Uploaded: ...

Astro-Tech Imaging Group
The refractors!
Cloudy Nights
SF Bay Area Imagers
Imaged with N.I.N.A.
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Status	Advanced success
Started	...
Astrometry.net job	9085666
PixInsight job	APPO5V7CBJD7PPGGMFLFA27F8PMVPA0H
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h01m00s.14
RA (top/left)	04h10m18s.67
RA (top/right)	03h51m29s.22
RA (bottom/right)	03h51m58s.79
RA (bottom/left)	04h10m12s.64

Dec (center)	+36°25′49″.7
Dec (top/left)	+37°40′54″.10
Dec (top/right)	+37°37′25″.2
Dec (bottom/right)	+35°08′00″.4
Dec (bottom/left)	+35°11′34″.6

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California Nebula (NGC 1499) - ForaxX SHO

California Nebula (NGC 1499) - ForaxX SHO

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California Nebula (NGC 1499) - ForaxX SHO

California Nebula (NGC 1499) - ForaxX SHO

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B

Sky plot

Histogram

In these public groups

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