Sh2 185 Ghost of Cassiopeia

Subs
Ha 40 frames 180s & 240s 2hrs 16m

Oiii 37 frames 180s & 240s 2hrs 7m

Sii 45 frames 180s & 240s 2hrs 35m

Blur Ext

Graxpert

Seti Astro Statistical Stretch

LRGB Combination

Curves and Masks

HDRMultiscale transform (Small Scale 32)

Local Histogram Transformation

Unsharp mask

SetiAstro NB to RGB Stars Script

Add stars back

Reduce Magenta

Small Clarity and Texture adjust

The "Ghost of Cassiopeia" refers to IC 63, a nebula in the constellation Cassiopeia, characterised by its blue-red colour and cometary shape. It's located roughly 550-610 light-years away from Earth. The nebula's appearance is influenced by the nearby star, Gamma Cassiopeiae, which is a bright, rapidly rotating blue-white subgiant variable star.