knud, I finally put an animated #Moon observation from 2018 onto #WikimediaCommons, where I observed the Moon one evening and then again the next morning. With a ~7000km baseline due to the Earth having rotated with me on it, the Moon appears under an angle differing by ~0.5°. That is "diurnal libration":
(animated gifs not supported here, so a link only)
https://commons.wikimedia.org/wiki/File:Diurnal_libration_of_the_Moon_(animated).gif
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