pericentre
US pericenter
/ (ˈpɛrɪˌsɛntə) /
noun
the point in an elliptical orbit that is nearest to the centre of mass of the system
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Example sentences from the Web for pericentre
Starting from the pericentre, it is completed on the return to the pericentre.
In astronomy the word denotes the angular distance of a body from the pericentre of the orbit in which it is moving.