First image - frames selected for SPC detail
Second image - again, frames chosen for SPC detail
Third image, frames chosen for equatorial detail
Fourth, image. Processed similarly to number 3, but allowed more frames to be stacked by slightly lowering the cutoff quality threshold.
This seems to have highlighted the south polar cap better than the others, and you can clearly
see that it has broken into several pieces as it shrinks.
Fifth is made by narrowing the selection criteria in registax, and then reprocessing the set.
More info on how these were taken and processed, and the high-res originals can be found here.