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Old 21-11-2010, 12:59 PM
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pgc hunter
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Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,980
Thanks all. The rarity of these nights can be illustrated by the fact that I had only 1 other night like that this year. Even this particular night the real good seeing lasted only half the night. I myself was somewhat skeptical of seeing detail on Ganymede until now but given the right conditions and enough magnification the tiny disk actually appears quite sizeable and the dusky markings manifest themselves. It is also possible to see subtle colour differences between Ganymede and Callisto, it's an interesting contrast between the yellow-orange hue of Ganymede and the pale ice-blue of Callisto when the pair are close to each other.
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