Thanks for comments.
Russel, they were 13 AVIs of 30 seconds with about 480 frames. I used to animation only 9 stacked AVIs. The others 4, the moon Io was vanished inside the sufrace of Jupiter.
AS!2, wavelets Registax 6 and PS-CS3.
The sky was very very dark, although with much "dark materia" around
: e. g. , I saw Jupiter very bright, but in all sky only few bright stars.
If I was with my equipments inside a swiming pool ... I would have better image, with less refraction by high humidity !
I did other with Ganymede and Europa. I will process and publish it here.