M101 in LHaRGB

[Padraic M]

Took this image over three nights in the last week. Unfortunately I've got Bortle 8 skies, with a 3/4-to-full moon so plenty of LP and noise in there. I've drawn a line under it now, not going to collect any more data until I get dark skies and no moon.

A total of just over 11 hours, made up of:
36x 600s Ha
110x 60s Red
110x 60s Green
110x 60s Blue
Luminance created from an all-channel stack.

Processed in APP, Gimp, Noise Ninja. Captured with NINA and PHD2.
Esprit 80, HEQ5 Pro, ASI1600MM Pro at -20C.

[tomato]

That's a good result under a full moon,  as you point out, M101 is a challenging subject if you are not under dark, moonless skies.

[Padraic M]

Thanks @tomato, I've just been reading up about ngc5471, that blue 'Giant Extra-galactic H-II Region' (GEHR) just above M101. I knew it wasn't a star!

Hard to extract any more detail out of this shot without bringing up the noise.