nutation library

Functions

approxNutation(double jde) → ({double dEps, double dPsi})

Fast approximation of nutation. Accuracy: 0.5″ in Δψ, 0.1″ in Δε.

meanObliquity(double jde) → double

Mean obliquity of the ecliptic (ε₀) using the IAU 1980 polynomial.

meanObliquityLaskar(double jde) → double

Mean obliquity using the Laskar 1986 polynomial.

nutation(double jde) → ({double dEps, double dPsi})

Returns nutation in longitude (Δψ) and nutation in obliquity (Δε) for a given JDE, both in radians.

nutationInRA(double jde) → double

Nutation in right ascension (equation of the equinoxes), in radians.