This was a good night with the 235mm cassegrain under average good images.
Period was just before the moisture deposition where after the image quality was degrading.
470 and 392x magnification was in in use during.
Banding pattern indeed with the polar cap a little darker than the whole clear hemisphere part.
Main thing was the capture of the brightening in the temperate band clearer than the others. Please refer to the sketches.
This could be a site for spot occurence (any brightening is not obligatory followed by a spot: an hypothesis to investigate.
I am waiting for fixed images with the 235 and 254mm apertures for a deeper record.
Some other reports are issued at http://alpo-j.asahik...test/Uranus.htm
Thanks for the read.