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For my first attempt at the Fireworks Galaxy, I decided to go for an LRGB image with an Ha blend in both the Red and Lum channels. Since the galaxy is not particularly bright, I found that the Ha blended into the Lum channel gave the image a significant signal boost. Despite the weather and lack of long nights, I somehow managed to capture just over 15 hours. I can only conclude that my recent move to unguided imaging is improving my capture efficiency.... Alan LIGHTS: L:11, R:9, G: 15, B: 9 x 600s; Ha:16 x 1800s. DARKS:30; BIAS:100; FLATS:40. Captured with an Esprit 150.
My first attempt at the Fireworks Galaxy (NGC6946) - which represents just over 15 hours. By accident it turns out that I also have captured a 2017 supernova - this is annotated in another image also in this album. My thanks to @gorann for spotting the supernova ! LIGHTS: L:11, R:9, G: 15, B: 9 x 600s; Ha:16 x 1800s. DARKS:30; BIAS:100; FLATS:40. Captured with an Esprit 150