apokrone, perikrone:
More particles are ejected from Enceladus when it is at its most distant point from Saturn (apokrone) than at the closest point in its elliptical orbit (perikrone), by about a factor of three. [“The Source of Saturn’s E Ring,” Candice Hansen-Koharcheck, The Planetary Report (September Equinox 2017, paywall)]
Try dropping these in casual conversation.
