Examples of how to use planetary functions.
#include <stdio.h>
#include <libnova/mars.h>
#include <libnova/julian_day.h>
#include <libnova/rise_set.h>
#include <libnova/transform.h>
#include <libnova/utility.h>
void print_date (
char * title,
struct ln_zonedate* date)
{
printf ("\n%s\n",title);
printf (
" Year : %d\n", date->
years);
printf (
" Month : %d\n", date->
months);
printf (
" Day : %d\n", date->
days);
printf (
" Hours : %d\n", date->
hours);
printf (
" Minutes : %d\n", date->
minutes);
printf (
" Seconds : %f\n", date->
seconds);
}
int main (int argc, char * argv[])
{
double JD;
double au;
observer.lng = -3.18;
printf ("JD %f\n", JD);
printf("Mars L %f B %f R %f\n", pos.L, pos.B, pos.R);
printf("Mars RA %d:%d:%f Dec %d:%d:%f\n", hequ.ra.hours, hequ.ra.minutes, hequ.ra.seconds, hequ.dec.degrees, hequ.dec.minutes, hequ.dec.seconds);
printf ("mars -> Earth dist (AU) %f\n",au);
printf ("mars -> Sun dist (AU) %f\n",au);
printf ("mars -> illuminated disk %f\n",au);
printf ("mars -> magnitude %f\n",au);
printf ("mars -> phase %f\n",au);
printf ("Moon is circumpolar\n");
else {
ln_get_local_date (rst.rise, &rise);
ln_get_local_date (rst.transit, &transit);
ln_get_local_date (rst.set, &set);
print_date ("Rise", &rise);
print_date ("Transit", &transit);
print_date ("Set", &set);
}
return 0;
}
double ln_get_julian_from_sys()
Calculate julian day from system time.
Definition: julian_day.c:249
void LIBNOVA_EXPORT ln_equ_to_hequ(struct ln_equ_posn *pos, struct lnh_equ_posn *hpos)
human double equatorial position to human readable equatorial position
Definition: utility.c:342
void ln_get_mars_equ_coords(double JD, struct ln_equ_posn *position)
Calculate Mars equatorial coordinates.
Definition: mars.c:6538
double ln_get_mars_solar_dist(double JD)
Calculate the distance between Mars and the Sun.
Definition: mars.c:6692
void ln_get_mars_helio_coords(double JD, struct ln_helio_posn *position)
Calculate Mars heliocentric coordinates.
Definition: mars.c:6585
int ln_get_mars_rst(double JD, struct ln_lnlat_posn *observer, struct ln_rst_time *rst)
Calculate the time of rise, set and transit for Mars.
Definition: mars.c:6781
double ln_get_mars_earth_dist(double JD)
Calculate the distance between Mars and the Earth.
Definition: mars.c:6659
double ln_get_mars_disk(double JD)
Calculate the illuminated fraction of Mars disk.
Definition: mars.c:6731
double ln_get_mars_phase(double JD)
Calculate the phase angle of Mars.
Definition: mars.c:6753
double ln_get_mars_magnitude(double JD)
Calculate the visible magnitude of Mars.
Definition: mars.c:6709
Equatorial Coordinates.
Definition: ln_types.h:171
Heliocentric position.
Definition: ln_types.h:217
Ecliptical (or celestial) Longitude and Latitude.
Definition: ln_types.h:201
double lat
Definition: ln_types.h:203
Rise, Set and Transit times.
Definition: ln_types.h:318
Human readable Date and time with timezone information used by libnova.
Definition: ln_types.h:87
int minutes
Definition: ln_types.h:92
int months
Definition: ln_types.h:89
int hours
Definition: ln_types.h:91
int years
Definition: ln_types.h:88
int days
Definition: ln_types.h:90
double seconds
Definition: ln_types.h:93
Right Ascension and Declination.
Definition: ln_types.h:131