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This was my first time trying to image and process a comet. I definitely learned a lot and am reasonably happy with the result! This is a composite of 2 images: One where I aligned and stacked on the comet, and one where I aligned and stacked on the stars. I found that I got better results by stacking the comet in batches of every 5th image as it allowed me to better reject the stars since they weren't overlapping.

(Original Post on Astrobin)

Equipment:

  • Imaging Optics: William Optics Redcat 51

  • Imaging Cameras: ZWO ASI183MC Pro

  • Mounts: Sky-Watcher Star Adventurer GTi

  • Filters:

    • Optolong L-Pro 1.25"

  • Accessories:

    • ZWO ASIAIR Pro
    • ZWO EAF

  • Software:

    • Adobe Lightroom
    • Pleiades Astrophoto PixInsight

  • Guide Scope: ZWO 30mm Mini Guider Scope

  • Guide Cameras: ZWO ASI120MM Mini

Aquisition:

  • Imaging Dates:

    • Jan. 26, 2023

  • Frames:

    • Optolong L-Pro 1.25": 169x60"(2h 49") (gain: 111.00) -10C bin 1x1

  • Total Integration Time: 2h 49"

  • Darks: 60

  • Flats: 30

  • Dark Flats: 60

  • Bortle: 3.00

Processing:

PixInsight:

  • WeightedBatchPreprocessing (Calibration, Registration, and Stacking on the stars)
  • CometAlignment + ImageIntegration (Aligning and stacking on comet)
  • AutomaticBackgroundExtractor
  • DynamicBackgroundExtractor
  • ScreenTransferFunction + HistogramTransformation (Stretching)
  • StarMask to combine star stacked image with comet stacked image
  • PixelMath to combine the background stars with the comet image
  • CurvesTransformation (some minor tweaks to the colors and further stretching)

LightRoom:

  • Increase in vibrance/saturation
  • Boost contrast
  • Noise reduction and Color Noise reduction (to clean up residual star streaks)
  • Slightly bumped Dehaze

Social Accounts: