NGC281 - The Pacman Nebula


Click on the image to see a  larger version.

Found directly beneath the 'W' of Cassiopeia

Scope: Planewave 12.5" CDK
Camera: Apogee U16M w Astrodon Gen II Filters
Mount: Paramount ME guided with an Astrodon MMOAG/ST-402ME 
9 x 20 min H-Alpha; 14 x 20min OIII, 12/10/14 x 10 min RGB

Acquired with CCD-Commander and TheSkyX 

RGB Processing in PixInsight: CombineColours, SPCC, DBE, BlurX, NoiseX, Curves, HT, SatBoost, DarkStructureEnhance, SCNR
RGB Processing in Photoshop: Curves, slight gradient removal, SelectiveColour, NoiseX

Ha and OIII Processing in PixInsight: BlurX, NoiseX, HT, Curves, 3xLHR, DarkStructureEnhance
Ha and OIII processing in Photoshop: Copy Ha into Red of new image, OIII into Green and Blue, Curves, NoiseX

HOO+RGB combine in Photoshop: Layered RGB over HOO using Lighten.

Lucknow, Ontario
Sept 2023

Here is a more conventional HaRGB image where the Ha  data has been added to Red at 100% and to Blue at 20% using Lighten blend mode:

ngc281 aka Pacman HaRGB

Here is the pure RGB image, before addition to the HOO mage. Click on the image to see a larger version):