Struct MoonPhase 

pub struct MoonPhase {
    pub elongation_deg: f64,
    pub phase_angle_deg: f64,
    pub illuminated_fraction: f64,
    pub waxing: bool,
}

Illumination geometry of the Moon at a Julian Ephemeris Day (TT), from the Moon’s and Sun’s geocentric positions (ELP/MPP02 + VSOP87D). Computed per Meeus, Astronomical Algorithms 2e, chapter 48 — using the true geocentric elongation (including the Moon’s ecliptic latitude) and the Sun/Moon distances, not a longitude-only approximation.

Fields

elongation_deg: f64

Geocentric ecliptic-longitude elongation Moon−Sun, degrees [0, 360): 0 = new, 90 = first quarter, 180 = full, 270 = last quarter. Drives the phase name and the waxing/waning sense.

phase_angle_deg: f64

Phase angle i (the Sun–Moon–Earth angle), degrees [0, 180]: 0 = full, 180 = new (Meeus eq. 48.3).

illuminated_fraction: f64

Illuminated fraction of the Moon’s disc, 0.0–1.0 (Meeus eq. 48.1, k = (1 + cos i) / 2).

waxing: bool

true while waxing (new → full, elongation in (0, 180)), false while waning (full → new).

Trait Implementations

impl Clone for MoonPhase

fn clone(&self) -> MoonPhase

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for MoonPhase

impl Debug for MoonPhase

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for MoonPhase

fn eq(&self, other: &MoonPhase) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MoonPhase