this post was submitted on 22 Nov 2023
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The Deer Lick Group and Stephan's Quintet [OC] (live.staticflickr.com)
submitted 1 year ago by lefty7283 to c/pics
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[–] lefty7283 1 points 1 year ago* (last edited 1 year ago) (1 children)

The Deer Lick Group (right) is a group of galaxies with NGC 7331 in the foreground, and the galaxies surrounding it. NGC 7331 is approximately 40 million light years away, with the other Deer Lick members ~300 million light years behind it. Stephan's Quintet (left) is a grouping of 5 galaxies. It was also one of the first targets photographed by the JWST

Much like deerlick, one of them is in the foreground ~40 Mly away from us, and the other 4 are 210-340 Mly distant. These distant galaxies are interacting and will eventually merge together. Here is an annotated image showing more galaxies in the uncropped FOV. Captured on November 16th, 17th, and 18th, 2020 from a bortle 6 zone.

Places where I host my other images:

Flickr

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-120MC for guiding

  • Moonlite Autofocuser

Acquisition: 12 hours 38 minutes (Camera at Unity Gain, -15°C)

  • Lum- 235x120"

  • Red- 48x120"

  • Green- 47x120

  • Blue- 49x120"

  • 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

  • DrizzleIntegration (Luminance only)

  • DynamicCrop

  • DynamicBackgroundExtraction

Luminance:

  • EZ Decon and Denoise (Luminance only)

  • ArcsinhStretch

  • HistogramTransformation

RGB

  • StarAlign RGB stacks to Drizzled Lum

  • LinearFit to Green

  • ChannelCombintion

  • PhotometricColorCalibration

  • HSV Repair

  • ArcsinhStretch

  • HistogramTransformation

  • LRGBCombination with Lum

Nonlinear:

  • Several CurveTransformations to adjust lightness, contrast, saturation, etc

  • ACDNR

  • LocalHistogramEqualization

  • More Curves

  • EZ Star Reduction

  • Resample to 60%

  • DynamicCrop

  • Annotation

[–] afk_strats 2 points 1 year ago (1 children)

As someone who takes EXTREMELY amateur astrophotography pics with a 600mm lens, I am blown away by the time and work that went into this shot. Please keep posting

[–] lefty7283 1 points 1 year ago

Will do!