astronomyengine (version 0.1.0)

next_lunar_apsis: Find the next lunar apsis event

Description

Given a lunar apsis event (perigee or apogee), finds the next apsis event in the series. This function alternates between finding perigees and apogees.

Usage

next_lunar_apsis(apsis)

Value

A list with the same structure as search_lunar_apsis():

time

A POSIXct datetime of the next lunar apsis.

kind

Integer code: 0 for perigee, 1 for apogee.

dist_au

Distance in astronomical units.

dist_km

Distance in kilometers.

Arguments

apsis

A list returned from search_lunar_apsis() or a previous call to next_lunar_apsis().

Examples

start <- as.POSIXct("2025-01-01", tz = "UTC")
apsis1 <- search_lunar_apsis(start)
apsis2 <- next_lunar_apsis(apsis1)
apsis3 <- next_lunar_apsis(apsis2)