Thanks guys, I was taking stacks of avis that night but only one came close..
Eric, I am using Imaging Source CCD with Sony ICX618AQA sensor
http://www.theimagingsource.com/en_U...or/dfk21au618/. At the time I was in Y800 Y800 capture mode at 60 fps. In the end only 700 of 6000 frames proved to be stackable (after some comparison tests with AS!2). Before imaging I verified my collimation on nearby Aldebaran and used Bathinov mask / microfocuser to fix final focus position.
I am posting one full sized frame from the animation showing Io's disk half eclipsed by the planet.. pretty neat effect despite the seeing. Two minutes later the clouds rolled in.
- Seb