apparent library

Properties

kappa → double

Constant of aberration κ in radians.

final

Functions

aberration(double ra, double dec, double sunLon, double eccentricity, double t) → ({double dAlpha, double dDelta})

Aberration corrections for equatorial coordinates.

eclipticAberration(double lon, double lat, double jde) → ({double dLat, double dLon})

Aberration corrections for ecliptic coordinates.

nutationCorrection(double ra, double dec, double jd) → ({double dAlpha, double dDelta})

Returns nutation corrections for equatorial coordinates.

perihelionEarth(double t) → double

Longitude of perihelion of Earth's orbit.