astro::solar_time::detail Namespace Reference

Functions
constexpr auto	sun_mean_longitude (const double jde_tt) -> toolbox::AngleDeg
	Computes the Sun's mean longitude L0, referred to the mean equinox of the date.

Function Documentation

sun_mean_longitude()

auto astro::solar_time::detail::sun_mean_longitude ( const double jde_tt ) ->toolbox::AngleDeg

nodiscardconstexpr

Computes the Sun's mean longitude L0, referred to the mean equinox of the date.

Parameters

jde_tt

The julian ephemeris day number, which is based on TT.

Returns

L0, unnormalized.

See also

Jean Meeus, "Astronomical Algorithms", Second Edition, Formula (28.2).