The “Chel Grett” Nebula | Sharpless 73

2022 Reprocess

 

Original 2020 Edit

 

Image Details:

This is an area of Integrated Flux Nebula in the Hercules constellation, meaning it is a cloud of dust (in this case, one which is off the galactic plane by 45 degrees) which is illuminated by the combined light of the Milky Way. The title is of my own choosing, official databases simply refer to this as Sh2-173.

Equipment:

  • William Optics Star71-II Petzval APO (345mm Focal Length, F/4.9)

  • ZWO ASI1600MM-P, ZWO Filters

  • Celestron CGEM-II

  • Autoguiding: Orion 50mm Guidescope + ZWO ASI224MC

Exposures:

  • Luminance: 316 x 180” (Total: 15h 48m)

  • Red, Green, Blue: 70, 69, 69 x 240” (Total: 13h 52m)

Misc Details:

  • Capture Software: AstrophotographyTool, PHD2 (guiding), Pegasus Powerbox (dew heater control, power management)

  • Processing Software: PixInsight

  • Taken from: Wichita, KS, Bortle 5

  • Capture Dates: 29 April, 1, 17-19 May, 2020

Annotation

Annotated