pericentre

US pericenter

/ (ˈpɛrɪˌsɛntə) /

noun

the point in an elliptical orbit that is nearest to the centre of mass of the system
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for pericentre