The Soul Nebula, also known as Westerhout 5, is an emission nebula located in Cassiopeia, 7500 light years away from us. Wikipedia
|Dates||October 25th, 2022 (New Moon)|
|Frames||50x300” (5mins), 4 hours and 10 minutes of total integration time|
|Focal Length||287mm (f/4.7)|
|Camera||ZWO ASI533MC-Pro (gain 100, cooled at -10°C)|
|Telescope||TS-Optics Photoline 60mm Doublet Apochromatic Refractor|
|Filters||Optolong L-Extreme 2” Narrowband Filter|
|Guide Scope||Angeleyes Mini Guidescope 30mm f/4|
|Guide Camera||ZWO ASI 120MM mini|
|Computer||ZWO ASIAIR Pro|
I stacked the lights frames in Siril using the OSC Preprocessing Without DBF (Darks, Biases, Flats) script. I decided not to use any Dark, Bias or Flat frames. I might try to create a dark frame library later, but the ASI533MC-Pro is considered a camera that can do without darks given the absence of amp glow.
I tried to process the image to replicate the so called “Hubble Palette” where Hydrogen gas usually has a orange hue and Oxygen gas is blue. At the bottom of the page there is an example of the same image but processed in a more “natural” way, where the nebula is appearing only red.
I then used the following tools: