Lunar mean motion and months per year from the Earth-Moon distance (Kepler's third law, n^2 a^3 = G(M_E + M_M), as in Farhat et al. 2022 Table D.2)
Source:R/months_per_year.R
months_per_year.RdLunar mean motion and months per year from the Earth-Moon distance (Kepler's third law, n^2 a^3 = G(M_E + M_M), as in Farhat et al. 2022 Table D.2)
Usage
months_per_year(a_RE, kind = c("sidereal", "synodic"))Arguments
- a_RE
Earth-Moon distance (semi-major axis of the lunar orbit) in Earth radii (numeric vector, > 0; the present-day value is about 60.14). Required (no default).
- kind
Type of lunar month that is counted per year (character):
"sidereal"(relative to the stars) or"synodic"(new moon to new moon, one fewer per year).Default=c("sidereal", "synodic"), i.e."sidereal".