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physical phenomena > event > celestial event > periodic celestial event > orbital event > binary star orbital event

binary star orbital event comparison table

Subject	has antonym	has definition
apastron	periastron	The point in the orbit of one component of a binary system where it is farthest from the other.
apocenter	pericenter	The point in the orbit of one component of a binary system which is farthest from the center of mass of the system.
periastron	apastron	The point in the orbit of one component of a binary system where it is nearest the other component.
pericenter	apocenter	The point in the orbit of one component of a binary system which is closest to the center of mass of the system.

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