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  • Continuing to reprocess old data since I've realized my processing skills were shit back when I originally shot this galaxy in 2019. I'm a lot happier with the more natural colors and better noise reduction on this one. Captured on April 22nd and 23rd, 2019 from a bortle 7 zone.

    Places where I host my other images:

    Flickr | Instagram |

    Equipment:

    • 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-290mc for guiding
    • Moonlite Autofocuser

    Acquisition: 2 hour 47 minutes (Camera at Unity Gain, -20°C)

    • CLS- 52x120"
    • Red- 21x60"
    • Green- 21x60"
    • Blue- 21x60"
    • Darks- 30
    • Flats- 30 per filter

    Capture Software:

    • Captured using N.I.N.A. and PHD2 for guiding and dithering.

    PixInsight Processing:

    • BatchPreProcessing
    • SubframeSelector
    • StarAlignment
    • Blink
    • ImageIntegration

    Linear:

    • DynamicCrop
    • DynamicBackgroundExtraction 2x

    duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)

    $T * med(model) / model

    Luminance Linear:

    • BlurXTerminator
    • ArcsinhStretch + HT to stretch nonlinear

    RGB Linear:

    • ChannelCombination to combine monochrome Red Green and Blue stacks into color RGB image
    • SpectroPhotometricColorCalibration
    • BlurXTerminator
    • DeepSNR
    • HSV Repair
    • ArcsinhStretch + HT to stretch nonlinear

    NonLinear:

    • LRGBCombination to add stretched L as a luminance layer to RGB
    • Several Curve transformations to adjust lightness, contrast, saturation, hues, etc with various masks
    • DeepSNR again
    • MLT for large scale chrominance noise reduction
    • More Curves
    • Invert > SCNR green > Invert to remove some magentas from stars
    • LocalHistogramEqualization
    • even more curves
    • DynamicCrop
    • Annotation