Examples of how to use asteroid functions.
#include <stdio.h>
#include <libnova/asteroid.h>
#include <libnova/julian_day.h>
#include <libnova/rise_set.h>
#include <libnova/transform.h>
#include <libnova/elliptic_motion.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, M_JD;
double l,V,dist;
double H, G;
double mag, elong, ph;
char* M_epoch = "K036A";
observer.lat = 55.92;
observer.lng = -3.18;
printf ("JD (sys) %f\n", JD);
orbit.a = 2.7730346;
orbit.e = 0.2299839;
orbit.i = 34.84989;
orbit.omega = 173.16479;
orbit.w = 310.45917;
orbit.n =0.21343771;
H = 4.13;
G = 0.11;
printf ("JD (Perihelion) %f\n", orbit.JD);
printf ("(Geocentric Rect Coords X) for Pallas %f\n", posn.X);
printf ("(Geocentric Rect Coords Y) for Pallas %f\n", posn.Y);
printf ("(Geocentric Rect Coords Z) for Pallas %f\n", posn.Z);
printf ("(Heliocentric Rect Coords X) for Pallas %f\n", posn.X);
printf ("(Heliocentric Rect Coords Y) for Pallas %f\n", posn.Y);
printf ("(Heliocentric Rect Coords Z) for Pallas %f\n", posn.Z);
printf ("(RA) for Pallas %f\n", equ_posn.ra);
printf ("(Dec) for Pallas %f\n", equ_posn.dec);
printf ("Az %f\n",hrz.az);
printf ("Alt %f\n", hrz.alt);
printf ("(Orbit Length) for Pallas in AU %f\n", l);
printf ("(Orbit Perihelion Vel) for Pallas in kms %f\n", V);
printf ("(Orbit Aphelion Vel) for Pallas in kms %f\n", V);
printf ("(Orbit Vel JD) for Pallas in kms %f\n", V);
printf ("Solar Dist (AU) : %f\n", dist);
printf ("Earth Dist (AU) : %f\n", dist);
printf ("Phase angle : %f\n",ph);
printf ("Elongation : %f\n",elong);
mag = ln_get_asteroid_mag (JD, &orbit, H, G);
printf ("Magnitude : %f\n", mag);
printf ("Pallas 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;
}