perigalacticum

English edit

perigalacticum (plural perigalactica)

(astronomy) The closest point in a star's orbit around the centre of a galaxy (the galactic periapsis).
- 1981, George Ellis Williams, Megacycles: Long-term Episodicity in Earth and Planetary History:
  During the late Cenozoic glaciation, high-latitude glaciation started in the Miocene 14 m.y. ago, and the sun is presently 8 + 4 m.y. from the perigalacticum.