29 Jan 2006
Object name: M82 Ursa Major A
Popular name: Ursa Major A
Object type: Galaxy
Magnitude: 9.2
Size: 11.2 4.3
Position angle: 6
Classification: Sd
Apparent RA: 09 55 54.0 Apparent Dec: +69 40 59
Constellation: Ursa Major

First decent RGB image with the new homemade filter wheel - so I'm happy its come out the right colour, and not with R in the G and B in the R, and so forth.

Very poor weekend - very clear skies but dreadful seeing made high res work impossible, and focus very hard. I seriously need to do some work on my focusing systems - it is my biggest area of struggle.

Captured with 2x2 binning in ArtemisCapture. Calibrated and stacked in Maxim. DDP and gradient removal in maxim. Colour combined in maxim and LLRGB created in photshop.

Things went poorly on the colours - some odd things happening around the stars, do I had to bodge things a bit to hide the mess in the processing.

This image was autoguided using my 400mm focal length refractor and my black and white SC1 webcam.

Exposure Details :

5x360s on 200mm @ F5 with ART285
7x300s on 200mm @ F5 with ART285
Blue 5x120s on 200mm @ F5 with ART285
Red 5x180s on 200mm @ F5 with ART285
Green 5x120s on 200mm @ F5 with ART285

Curdridge Observatory, Southampton,UK