19 #ifndef _LN_PARALLAX_H
20 #define _LN_PARALLAX_H
22 #include <libnova/ln_types.h>
32 void LIBNOVA_EXPORT ln_get_parallax(
struct ln_equ_posn *
object,
33 double au_distance,
struct ln_lnlat_posn *observer,
double height,
40 void LIBNOVA_EXPORT ln_get_parallax_ha(
struct ln_equ_posn *
object,
41 double au_distance,
struct ln_lnlat_posn *observer,
double height,
double lng
Definition: ln_types.h:205
double LIBNOVA_EXPORT ln_get_apparent_sidereal_time(double JD)
Calculate apparent sidereal time from date.
Definition: sidereal_time.c:62
double ra
Definition: ln_types.h:177
double LIBNOVA_EXPORT ln_deg_to_rad(double degrees)
degrees to radians
Definition: utility.c:93
double lat
Definition: ln_types.h:206
void ln_get_earth_centre_dist(float height, double latitude, double *p_sin_o, double *p_cos_o)
Calculate Earth globe centre distance.
Definition: earth.c:2793
double LIBNOVA_EXPORT ln_rad_to_deg(double radians)
radians to degrees
Definition: utility.c:87
Ecliptical (or celestial) Longitude and Latitude.
Definition: ln_types.h:204
Equatorial Coordinates.
Definition: ln_types.h:176
double dec
Definition: ln_types.h:178