VEphemeris 2.0.3

General information

VEphemeris is a class library, created for .NET 6.0 framework. VEphemeris provides full set of methods and properties for complex calculation of astronomical ephemerides (XEphem fuctionality).

Objects:

• Sun
• Moon
• Planets, Mercury - Pluto
• Comets
• Asteroids
• stars

Also VEphemeris contains methods for:

• Constellations
• Astrology chart data

Example code - console app

using GeoTimeZone; using TimeZoneConverter; using VEphemeris;

namespace VExample {

internal class Program
{
    private static AstroDef.Now tdat;
    private static AstroDef.Object pdat;
    static void Main(string[] args)
    {
        string[] dw = new string[] { "Sun", "Mon", "Tue", "Wed", "Thr", "Fri", "Sat" };
        int d = 0;
        double dt, dis;

        Console.WriteLine("VEphemeris Test");

        //intialize struct tdat             
        int yr = DateTime.Now.Year;
        int mn = DateTime.Now.Month;
        double dy = DateTime.Now.Day;
        double hr = DateTime.Now.Hour;
        double mi = DateTime.Now.Minute;

        tdat.site = WorldSites.sitetbl[0] + ", " + WorldSites.iso3tbl[0];
        tdat.lng = AstroDef.degrad(WorldSites.lngtbl[0]);
        tdat.lat = AstroDef.degrad(WorldSites.lattbl[0]);

        string tzname = TimeZoneLookup.GetTimeZone(WorldSites.lattbl[0], WorldSites.lngtbl[0]).Result;
        TimeZoneInfo tzinf = TZConvert.GetTimeZoneInfo(tzname);
        tdat.tz = tzinf.DisplayName;
        tdat.tzs = tzinf.BaseUtcOffset.Hours;

        tdat.temp = 15;
        tdat.elev = 91;
        tdat.pressure = 751;

        dt = dy + (hr + mi / 60) / 24; // local
        JulianDate.cal_mjd(mn, dt, yr, ref tdat.mjd);

        JulianDate.mjd_dow(tdat.mjd, ref d);
        tdat.dayow = dw[d];

        tdat.date = Utils.dateformat(tdat.mjd);
        tdat.time = Utils.timeformat(tdat.mjd, 1);

        tdat.mjd -= tdat.tzs / 24; //to UTC

        tdat.mjed = Utils.mm_mjed(tdat.mjd);

        GSiderealTime.lst(tdat.mjd, tdat.lng, ref tdat.lst);
         
        Console.WriteLine(string.Format("Site: {0} Location lat/long: {1:00.0}/{2:000.0}", 
            tdat.site, AstroDef.raddeg(tdat.lat), 
            AstroDef.raddeg(tdat.lng)));
        Console.WriteLine(string.Format("Date: {0} Time: {1}", 
            tdat.date + "," + tdat.dayow, 
            tdat.time + "," + tdat.tz));
        
        //calculate struct pdat, print altitude, azimuth, rising and setting times
        if (tdat.elev > 200)
            dis = AstroDef.DIS_HILLS;
        else
            dis = AstroDef.DIS_TYPICAL;

        pdat.object_type = AstroDef.PLANET;
        for (int i = 0; i < Planets.numberof_planets(); i++)
        {
            pdat.object_id = i;
            SkyObject.get_object_data(tdat, ref pdat);
            RiseAndSet.get_rise_set_data(tdat, ref pdat, dis);
            Console.WriteLine(string.Format("{0} - Alt: {1} Az: {2} Rise; {3} Set: {4}",
                Planets.planet_name(i),
                Utils.angleformat(pdat.altitude),
                Utils.angleformat(pdat.azimuth),
                Utils.timeformat(pdat.riseset.risetm + tdat.tzs / 24, 1),
                Utils.timeformat(pdat.riseset.settm + tdat.tzs / 24, 1)));
        }

    }
}

}

5. Hovhannisyan, 2022