NGC 281, The 'Pacman Nebula' is a star forming region dominated by Hydrogen gas 9500 light years from us in Cassiopea.
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Telescope. William Optics ZS80FD,
Camera. Atik 16HR,
Luminance x 18
Hb & OIII 10 each binned 2x2
5 minute subs
Ha used as luminance in 2 separate layers @ 50% opacity with saturation
adjustments applied to the RGB layer between the application of the Ha
luminance layers. This avoids the 'salmon pink' effect of a 50% or above
opacity Ha luminance layer.
The colour is mapped as....Red. Hydrogen Alpha, Green. Oxygen 3, and Blue. Hydrogen Beta.
