astro::delta_t::algo2 Namespace Reference

Functions
constexpr auto	compute (const double year) noexcept -> double
	Compute ΔT for a decimal Gregorian year using algorithm 2.

Function Documentation

compute()

auto astro::delta_t::algo2::compute ( const double year ) ->double

nodiscardconstexprnoexcept

Compute ΔT for a decimal Gregorian year using algorithm 2.

Parameters

year	The year, of double type.

Returns

ΔT in seconds.

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

Espenak and Meeus, NASA/TP-2006-214141, Section 2.7, equations (11)-(25). https://ntrs.nasa.gov/citations/20070003587

Note

noexcept: a non-finite year propagates to a non-finite ΔT (#86).

Frozen model; algorithms 3, 4, and 5 delegate to it for years before 2005.