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Updated version of this in LRGB this time. You can really start to see the brown dust start to appear underneath, this is the hardest part to pull out, it often appears as black compared to the wave of hydrogen behind. It could maybe do with longer subs and more time to pull it out further. I have over an hour of narrowband images from this same area, but I’m struggling to make it work. It seems like there is just no OIII in this nebula. It’s quite rich in Hα and SII, so might have to experiment with some bi-colour images.

Camera: FLI-PL6303E (-15°C)
Scope: Planewave 20″ (0.51m) CDK F4.5
Mount: Planewave Ascension 200HR
Guiding: None
Capture Software: ACP, Maxim DL
Processing Software: Deep Sky Stacker, PixInsight
Exposures: 8 x 5 mins (1×1 Lum), 8 x 2.5 mins (2×2 RGB). 1 Hour 40 mins total
Calibration: Automated

horsehead_nebula_final

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