Heliocentric time

Functions
double	ln_get_heliocentric_time_diff (double JD, struct ln_equ_posn *object)
	Calculate approximate heliocentric (barycentric) time correction for given date and object. More...

Detailed Description

Function Documentation

double ln_get_heliocentric_time_diff	(	double	JD,
		struct ln_equ_posn *	object
	)

Calculate approximate heliocentric (barycentric) time correction for given date and object.

Parameters

JD	Julian day
object	Pointer to object (RA, DEC) for which heliocentric correction will be caculated

Returns

Heliocentric correction in fraction of day

Calculate heliocentric corection for object at given coordinates and on given date.

References ln_equ_posn::dec, ln_nutation::ecliptic, ln_helio_posn::L, ln_deg_to_rad(), ln_get_earth_helio_coords(), ln_get_nutation(), ln_range_degrees(), ln_helio_posn::R, and ln_equ_posn::ra.