For those confused about the name think of a monkey's head viewed from the side.
This was an interim target I shot while Sh2-250 was obstructed and my spring galaxy targets were too low in the east. As such I averaged about an hour of data per night on this nebula. Captured on February 2nd 7th, 14th, 27th and March 6th, 2020 from a bortle 7 zone.
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**[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
* Agena 50mm Deluxe Straight-Through Guide Scope
* ZWO ASI-120MC for guiding
* Moonlite Autofocuser
**Acquisition:** 6 hours 36 minutes (Camera at Unity Gain, -20°C,)
* Ha- 42x360"
* Oiii- 24x360"
* 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:**
* BatchPreProcessing
* SubframeSelector
* StarAlignment
* [Blink](
https://youtu.be/sJeuWZNWImE?t=40)
* ImageIntegration
* DrizzleIntrgration (2X, VarK 1.5)
* DynamicCrop
* DynamicBackgroundExtraction
* Deconvolution (Ha only)
* TGV/MMT Noise reduction (Ha only)
* HistogramTransformations for stretching
* Topaz Denoise AI (Ha only)
* PIxelMath to combine channels into bicolor image (formula courtesy of dreamsplease
> R=iif(Ha > .15, Ha, (Ha\*.8)+(Oiii*.2))
> G=iif(Ha > 0.5, 1-(1-Oiii)*(1-(Ha-0.5)), Oiii *(Ha+0.5))
> B=iif(Oiii > .1, Oiii, (Ha\*.3)+(Oiii*.2))
* Invert>SCNR>invert to remove magenta hue
* ColorSaturation (bring out blue in nebula core)
* [Curves]()Transformation for color adjustments
* LRGBCombination with Ha
* ACDNR
* LocalHistogramEquilization
* Several more CurveTransformations
* HDRMultiscale transformaon a clone of the image, then PixelMath combined with original image 50:50
* MorphologicalTransformation to reduce star sizes
* Annotation
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