The distance between the centers of the two bodies in astronomical units (AU).
The distance between the centers of the two bodies in kilometers.
For a closest approach (perigee or perihelion), kind is ApsisKind.Pericenter.
For a farthest distance event (apogee or aphelion), kind is ApsisKind.Apocenter.
The date and time of the apsis.
A closest or farthest point in a body's orbit around its primary.
For a planet orbiting the Sun, apsis is a perihelion or aphelion, respectively. For the Moon orbiting the Earth, apsis is a perigee or apogee, respectively.
See