Function orb_elements

pub fn orb_elements(
    planet: &Planet,
    JD: f64,
) -> (f64, f64, f64, f64, f64, f64, f64, f64)

Expand description

Computes a planet’s orbital elements, referred to the mean equinox of the date

§Returns

(L, a, e, i, omega, pi, M, w)

L: Mean longitude | in radians
a: Semimajor axis of the orbit | in AU
e: Eccentricity of the orbit
i: Inclination of the plane of the orbit with the plane of the Earth’s ecliptic | in radians
omega: Longitude of the ascending node | in radians. An undefined value is returned for Planet::Earth.
pi: Longitude of the perihelion | in radians
M: Mean anomaly | in radians
w: Argument of the perihelion | in radians. An undefined value is returned for Planet::Earth.