astro::delta_t::algo3 Namespace Reference

Functions
constexpr auto	compute (const double year) -> double
	Compute ΔT for a decimal Gregorian year using algorithm 3.

Variables
constexpr double	MAXIMUM_YEAR_EXCLUSIVE

Function Documentation

compute()

auto astro::delta_t::algo3::compute ( const double year ) ->double

nodiscardconstexpr

Compute ΔT for a decimal Gregorian year using algorithm 3.

Parameters

year	The year, of double type.

Returns

ΔT in seconds.

Exceptions

std::invalid_argument

if the year is >= 3000 or not finite.

Example

compute(2005.99999999....) returns ΔT for the last moment of year 2005.

Example

compute(1984.0) returns ΔT for the first moment of year 1984.

See also

Fred Espenak, Thousand Year Canon of Solar Eclipses 1501 to 2500 (2014) - https://www.eclipsewise.com/help/deltatpoly2014.html

Note

Frozen comparison model; uses algo2 before 2005.

Variable Documentation

MAXIMUM_YEAR_EXCLUSIVE

double astro::delta_t::algo3::MAXIMUM_YEAR_EXCLUSIVE

inlineconstexpr