M31 - H-alpha enhanced:
'Scope: TEC 140
Mount: ASA DDM60 Pro mount - an awesome bit of kit as even the 1,500 second subs were unguided!
Camera: FLI ML16803
Subs: 5 x 1,000 seconds using each of Astrodon Tru-Balance RGB filters plus 10 x 1,500 seconds using an Astrodon 3nm Hα filter
Software: PixInsight and Photoshop CS6
The aim was to blend the H-alpha emission in such a way that it didn't dominate but nicely showed up the association of star formation with the spiral structure. The disruption to the symmetrical spiral structure is a result of which satellite galaxy?