sun_distance_km

Defined in: ephemeris.rs:118

fn sun_distance_km(epoch: &Epoch) -> f64

Sun-Earth distance [km] at the given epoch.

Uses simplified Meeus model with eccentricity correction. Accuracy: ~0.01 AU (~1.5 million km), sufficient for perturbation calculations.

Reference: Meeus, “Astronomical Algorithms”, Chapter 25.