This has been the most difficult object I've gone after so far! The [Spaghetti Nebula in the middle](
https://i.imgur.com/NwRs5Zz.jpg) is a stupidly faint supernova remnant caused by a star exploding about 40,000 years ago. It was difficult to pull out the nebulosity while keeping the noise down, and I spent quite a bit of time working on star reduction to further emphasize the nebula. [I also ran StarNet++ to make a completely starless version](
https://i.imgur.com/gJWUL2q.jpg), but it leaves a lot of artifacts when zoomed in. I doubt I'll continue using this lens for astrophotography due to its aberrations, even when stopped down. Captured on December 30th and 31st, 2019, and January 5th, 2020 from a bortle 6 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
* Agena 50mm Deluxe Straight-Through Guide Scope
* ZWO ASI-120MC for guiding
* Moonlite Autofocuser
**Acquisition:** 18 hours 10 minutes (Camera at Unity Gain, -20°C)
* Ha- 79x600"
* Oiii- 27x600"
* Darks- 30
**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/w69oGOS.png):**
* BatchPreProcessing
* StarAlignment
* [Blink](
https://youtu.be/sJeuWZNWImE?t=40)
* ImageIntegration
* DrizzleIntrgration
* DynamicCrop
* AutomaticBackgroundExtraction 2X
* TGV/MMT Noise reduction per channel
* Pixelmath to combine channels (HOO combination)
* PhotometricColorCalibration (Narrowband working mode)
* STF stretch applied via HistogramTransformation
* LRGBCombination using stretched Ha as luminance
* ACDNR
* ColorCalibration
* [Curve](
https://i.imgur.com/M0qzbaV.jpg)Transformation
* PixelMath ([Star De-emphasis method by Adam Block](
https://adamblockstudios.com/articles/star_demph))
* MMT Noise reduction
* More CurveTransformations
* MorphologicalTransformation to reduce star sizes
* Resample to 80%
* Annotation
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