Quote:
Originally Posted by asimov
As to the moons; I took a few of Io the other morning (9th Sept.) while capturing Jupiter. Io is 1 arc second dia. at the moment.
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Ganymede should be a good target too because it has an apparent size of 1.8 arcseconds with all sorts of differentiated surface features. Your previous image of Ganymede from June 2008 shows a number of sharply defined areas. At the time the moon had an apparent size of 1.7 arcseconds.