The Cygnus Wall in SHO (lefty7283)

The Cygnus Wall in SHO

This is my first proper go at Hubble Palette narrowband. I opted to focus more on the colors on this image (and avoid making one of the faux-bicolor SHO images) rather than on sharpening/noise reduction, so it's not the best image when zoomed in 1:1. I only shot this because the moon was too close my main target M16 for three nights, so I'll likely add more data to this later in the summer. Also beginning to shoot this when it was less than 30 degrees high didn't help either. [I also made a starless version for the hell of it using StarNet++](https://i.imgur.com/osf2mKS.jpg). Captured April 10th, 11th, and 13th, 2020 from a Bortle 7 zone.

**[Equipment:](https://i.imgur.com/BYyK1wu.jpg)**

* TPO 6" F/4 Imaging Newtonian

* Orion Sirius EQ-G

* ZWO ASI1600MM-Pro

* Skywatcher Quattro Coma Corrector

* ZWO EFW 8x1.25"/31mm

* Astronomik LRGB+CLS Filters- 31mm

* Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm

* Agena 50mm Deluxe Straight-Through Guide Scope

* ZWO ASI-120MC for guiding

* Moonlite Autofocuser

**Acquisition:** 5 hours 30 minutes (Camera at Unity Gain, -20°C)

* Sii- 19x360

* Ha- 18x360"

* Oiii- 18x360"

* Darks- 30

* Flats- 30 per filter

**Capture Software:**

* EQMod mount control. Captured using [N.I.N.A.](https://nighttime-imaging.eu/) and PHD2 for guiding and dithering.

**[PixInsight Processing:](https://i.imgur.com/dKJtPYc.png)**

* [Blink](https://youtu.be/sJeuWZNWImE?t=40)

* BatchPreProcessing

* StarAlignment

* ImageIntegration

* DrizzleIntrgration (2X, VarK 1.5)

* DynamicCrop

* AutomaticBackgroundExtraction (Function degree 1)

* Duplicated Ha to act as **Luminance**

**Luminance Processing:**

* TGV/MMT Noise reduction

* STF applied via HistogramTransformation

**Individual Sii, Ha, and Oiii channel Processing:**

* ChannelCombination (SHO mapped to RGB)

**SHO Processing:**

* Unlinked STF applied via HistogramTransformation

* SCNR (a little bit) to slightly remove green cast

* Invert > SCNR (a lotta bit) > Invert to remove magenta stars

* Several [Curve](https://i.imgur.com/dS0yFnl.jpg)Transformations for color tweaking, some using Yellow or Cyan color masks

* (This was the bulk of the time spent processing)

* HistogramTransformation to reduce the blacks tail

* More curves for color tweaking

* ACDNR

* MorphologicalTransformation to reduce star sizes

* Resample to 90%

* Annotation

ZWO ASI1600MM/QHY163M
Fast Newtonians
/r/astrophotography
Narrowband imaging
Suburban Astrophotography

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Status	Advanced success
Started	...
Astrometry.net job	3484073
PixInsight job	NHH0RWGAR2X5K8ZJX6QRSR9NJ30NF5KB
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h59m37s.806
RA (top/left)	21h02m58s.497
RA (top/right)	20h54m16s.642
RA (bottom/right)	20h56m22s.298
RA (bottom/left)	21h04m55s.187

Dec (center)	+43°39′31″.46
Dec (top/left)	+44°29′07″.50
Dec (top/right)	+44°00′03″.80
Dec (bottom/right)	+42°49′30″.84
Dec (bottom/left)	+43°18′02″.33

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