• lefty7283@lemmy.worldOPMEnglish
    2·
    5 months ago

    Sh2-64 is the red nebula to the right of the image. It frames up pretty well with the more golden stars seen in the milky way core. I probably should’ve gotten more exposure time to help bring out some of the dark nebula details, but it was only clear for one night at the dark site (at least the night went perfectly, which is rare for trips out to the middle of nowhere). Captured on June 7th, 2024 from a Bortle 3 zone (Deerlick Astronomy Village)

    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: 5 hours 44 minutes (Camera at half unity gain -15°C)

    • L - 76x120"

    • R - 32x120"

    • G - 32x120"

    • B - 32x120"

    • Darks- 30

    • Flats- 30 per filter

    Capture Software:

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

    PixInsight Preprocessing:

    • BatchPreProcessing

    • StarAlignment

    • Blink

    • ImageIntegration per channel per panel

    • DrizzleIntegration (2x, Var β=1.5)

    • Dynamic Crop

    • DynamicBackgroundExtraction

    Luminance Linear:

    • BlurXterminator (Correct only)

    • NoiseXterminator

    • HistogramTransformation + sketchpad’s iHDR script (low preset) to stretch to nonlinear

    RGB Linear:

    • ChannelCombination to combine monochrom R G and B stacks into color image

    • SpectrophotometricColorCalibration

    • BlurXterminator (correct only)

    • HSV repair

    • ArcsinhStretch + iHDR script (low preset) to stretch to nonlinear

    Nonlinear Processing:

    • LRGBCombination using stretched L as luminance

    • DeepSNR

    • Various curve adjustments for lightness, contrast, hue, saturation, etc (with varying lum/star masks)

    • Slight SCNR green

    • ColorSaturation to boost the saturation of the Ha region

    • More curves

    • NoiseXterminator

    • invert > SCNR > invert to remove some magentas

    • LocalHistogramEqualization

    two rounds at scale 16 and 132 to target different sized structures

    • LOTS more curve adjustments

    • MultiscaleLinearTransform for chrominance noise reduction

    • Even more curves

    • Resample to 60%

    • Annotation