Take a look at this guy's shot of Ganymede

[Oscar the Cat]

Imaged from Belarus by Mikhail Abgarian, Konstantin Morozov and Yuri Goryachko

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/1752001/page/0/view/collapsed/sb/5/o/all/fpart/1

[Tony G]

This is the main image on APOD (astronomy picture of the day) for today.

Tony G

[Rocket Pooch]

Impressive eh!  Paul, have you seen the images from the guy with his peltier cooled 13.5. newt in Australia?

[Rick]

I like the "409 of 10000" ratio. Very picky.

[Mike]

I like the "409 of 10000" ratio. Very picky.

I guess you would have to - The atmospheric disturbance on images of something that tiny would be ridiculous from just about anywhere.

[Oscar the Cat]

Hi Chris, no haven't seen the Aussie's images, do you have a link?

[Rick]

I guess you would have to - The atmospheric disturbance on images of something that tiny would be ridiculous from just about anywhere.

Yep. Even with excellent atmospheric conditions you'd expect some variation in image quality. The Rayleigh limit for that set-up should be about 0.5" (unless I've got all the units wrong somewhere), and the diameter is given as 1.7" so the stacking is buying quite a bit...