ApparentEquatorial returns the apparent position of the Sun as equatorial coordinates.

ApparentEquatorialVSOP87 returns the apparent position of the sun as equatorial coordinates.

ApparentLongitude returns apparent longitude of the Sun referenced to the true equinox of date.

ApparentVSOP87 returns the apparent position of the sun as ecliptic coordinates.

Eccentricity returns eccentricity of the Earth's orbit around the sun.

MeanAnomaly returns the mean anomaly of Earth at the given T.

Radius returns the Sun-Earth distance in AU.

True returns true geometric longitude and anomaly of the sun referenced to the mean equinox of date.

True2000 returns true geometric longitude and anomaly of the sun referenced to equinox J2000.

TrueEquatorial returns the true geometric position of the Sun as equatorial coordinates.

TrueVSOP87 returns the true geometric position of the sun as ecliptic coordinates.