pericentre

(from the article `apse`) ...orbit that are nearest to, and farthest from, the focus, or centre of attraction. The line of apsides, connecting the two points, is the major ...
Found on http://www.britannica.com/eb/a-z/p/44

Pericentre

The point on a spacecrafts orbit at which it is nearest to the centre of mass of the system. See also: Periapsis, Perigee.
Found on http://www.diracdelta.co.uk/science/source/p/e/pericentre/source.html
No exact match found