Aberration

Functions
void	ln_get_equ_aber (struct ln_equ_posn *mean_position, double JD, struct ln_equ_posn *position)
	Calculate equatorial coordinates with the effects of aberration. More...
void	ln_get_ecl_aber (struct ln_lnlat_posn *mean_position, double JD, struct ln_lnlat_posn *position)
	Calculate ecliptical coordinates with the effects of aberration. More...

Detailed Description

Aberration: need a description.

All angles are expressed in degrees.

Function Documentation

void ln_get_ecl_aber	(	struct ln_lnlat_posn *	mean_position,
		double	JD,
		struct ln_lnlat_posn *	position
	)

Calculate ecliptical coordinates with the effects of aberration.

Parameters

mean_position	Mean position of object
JD	Julian Day
position	Pointer to store new object position.

Calculate a stars ecliptical coordinates from it's mean ecliptical coordinates with the effects of aberration and nutation for a given Julian Day.

References ln_helio_posn::B, ln_lnlat_posn::lat, ln_deg_to_rad(), ln_get_solar_geom_coords(), ln_rad_to_deg(), and ln_lnlat_posn::lng.

void ln_get_equ_aber	(	struct ln_equ_posn *	mean_position,
		double	JD,
		struct ln_equ_posn *	position
	)

Calculate equatorial coordinates with the effects of aberration.

Parameters

mean_position	Mean position of object
JD	Julian Day
position	Pointer to store new object position.

Calculate a stars equatorial coordinates from it's mean equatorial coordinates with the effects of aberration and nutation for a given Julian Day.

References ln_equ_posn::dec, ln_deg_to_rad(), ln_rad_to_deg(), and ln_equ_posn::ra.

Referenced by ln_get_apparent_posn().