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G'Day Justin,
Daytime seeing is pretty poor compared to night time - lots of thermals in the atmosphere, etc. So 10 frames is not very many to stack and the seeing differences between each frame will soften the stacked image.
This is why most planetary and solar imagers use a video camera. We capture a lot of frames (500 to 1500 say) then we use the software to cull out the poor quality frames and the frames which are distorted by seeing, before stacking. After stacking, apply wavelets to sharpen up the image and bring out the detail.
I lot of people stack a lot more frames than me, but I typically stack my best 100 to 250 frames. If I'm really struggling with poor data, I'll come down to my best 30. Below that I reckon you are better off picking the best single frame and go with that.
Al.
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