It does take the earth awhile to cool down after a hot day, and your seeing can appear twichy as thermal rising will distort the atmophere. If your looking at Jupiter tonight, before the moon rises, exect to have some twich. I was looking at Jupiter last night and there was certainly some heat wobble. Waiting until later, say at least two hours, should improve seeing but then the moon will be flooding the sky with light - however Jupiter is bright enough to stand out well. Jupiter is going to be with us for some time, and next week when there is more darkness the views will improve.
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