//astronomy/io.github.cosinekitty.astronomy/ApsisInfo
class ApsisInfo(time: Time, kind: ApsisKind, distanceAu: Double)
An apsis event: pericenter (closest approach) or apocenter (farthest distance).
For the Moon orbiting the Earth, or a planet orbiting the Sun, an apsis is an event where the orbiting body reaches its closest or farthest point from the primary body. The closest approach is called pericenter and the farthest point is apocenter.
More specific terminology is common for particular orbiting bodies. The Moon's closest approach to the Earth is called perigee and its farthest point is called apogee. The closest approach of a planet to the Sun is called perihelion and the furthest point is called aphelion.
This data structure is returned by searchLunarApsis and nextLunarApsis to iterate through consecutive alternating perigees and apogees.
| ApsisInfo fun ApsisInfo(time: Time, kind: ApsisKind, distanceAu: Double) |
| Name | Summary |
|---|---|
| distanceAu val distanceAu: Double The distance between the centers of the bodies in astronomical units. |
|
| distanceKm val distanceKm: Double The distance between the centers of the bodies in kilometers. |
|
| kind val kind: ApsisKind Whether this is a pericenter or apocenter event. |
|
| time val time: Time The date and time of the apsis. |