Synodic period

dcterms modified equal to or less than 2020-11-19T16:30:42.222Zequal to or more than 2020-11-19T16:30:42.222Z
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1676 original
definition For planets, the mean interval of time between successive conjunctions of two planets, as observed from the Earth. For satellites, the mean interval between successive conjunctions of a satellite with the Sun, as observed from the satellite's primary.
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contributor AAS_Frey.Katie original