Function astro::precess::precess_eq_coords

pub fn precess_eq_coords(old_asc: f64, old_dec: f64, JD1: f64, JD2: f64) -> (f64, f64)

Computes equatorial coordinates reduced to a different epoch

Returns

(new_asc, new_dec)

• new_asc: Right ascension in the new epoch | in radians
• new_dec: Declination in the new epoch | in radians

Arguments

• old_asc: Right ascension in the old epoch | in radians, referred to the FK5 system
• old_dec: Declination in the old epoch | in radians, referred to the FK5 system
• JD1 : Julian (Ephemeris) day corresponding to the old epoch
• JD2 : Julian (Ephemeris) day corresponding to the new epoch