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Nice image overall.
As pointed out flats will improve the image.
I take dawn, dusk sky flats. I put a white T-shirt over the end of my scope and smooth out any wrinkles. I use a rubber band or something to hold it on.
I then shot a flat for each filter (you have to be fast as light conditions change rapidly at dusk and dawn so be organised with your file naming for saving).
I go for about 20,000 ADU for a flat and take about 3-5 and median combine them using CCDstack.
Make sure you take flats with the camera in the same orientation you intend to image with as then the dust donuts will still line up.
I also shoot bias images and subtract them from my flats. This then means you do not need to subtract bias images from the images later if you use these bias subtracted flats.
It all takes about 15 minutes or so and less with an ST2000 as the file downloads only take a few seconds.
Greg.
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