Some old favourites M81 & M82

[Ivor]

Tried a couple of ways of processing this and fairly happy with this result. I need to work out how to make a mask to cover just the bluey white arms of M81 I couldn't get it to work with colour mask.

Imaging Telescopes William Optics FLT110
Imaging Camera ZWO ASI2600MC Pro
Software:  PixInsight
Date: 19 Jan 2023
Frames: 121×300″(10h 5′) (gain: 0.00) -10°C bin 1×1
Avg. Moon age: 26.78 days
Avg. Moon phase:8.30%
Bortle Dark-Sky Scale: 4.00

[The Thing]

Very nice Ivor.

I'm processing M81 M82 at the moment and I hope the galaxies turn out as well as yours.

[Carole]

Ivor, have you got a version without the annotation for posting on members images?

Carole

[Ivor]

Here you go

[garrick]

Great image Ivor.

CS

GW