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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 |
| Accessories | 0.8x Flattener/Reducer |
| Filters | Optolong L-Extreme 2” Narrowband Filter |
| Mount | Sky-Watcher EQ6R-Pro |
| 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:
