/// <summary>
/// Gets longitude of true ascending node of lunar orbit
/// </summary>
private double AscendingNode(SkyContext c)
{
return(LunarEphem.TrueAscendingNode(c.JulianDay));
}
/// <summary>
/// Gets nearest apsis date
/// </summary>
private Date NearestApsis(SkyContext c, MoonApsis a)
{
return(c.GetDate(LunarEphem.NearestApsis(c.JulianDay, a, out double diameter)));
}
/// <summary>
/// Gets nearest greatest lunar declination date
/// </summary>
private Date NearestMaxDeclination(SkyContext c, MoonDeclination d)
{
return(c.GetDate(LunarEphem.NearestMaxDeclination(c.JulianDay, d, out double delta)));
}
/// <summary>
/// Gets nearest phase date
/// </summary>
private Date NearestPhase(SkyContext c, MoonPhase p)
{
return(c.GetDate(LunarEphem.NearestPhase(c.JulianDay, p)));
}
/// <summary>
/// Gets Moon age in days
/// </summary>
private double Age(SkyContext c)
{
return(LunarEphem.Age(c.JulianDay));
}
/// <summary>
/// Gets libration info for the Moon
/// </summary>
private Libration LibrationElements(SkyContext c)
{
return(LunarEphem.Libration(c.JulianDay, c.Get(Ecliptical), c.NutationElements.deltaPsi));
}
/// <summary>
/// Gets visual magnitude of the Moon
/// </summary>
public double Magnitude(SkyContext c)
{
return(LunarEphem.Magnitude(c.Get(PhaseAngle)));
}
/// <summary>
/// Gets visible semidiameter of the Moon, in seconds of arc
/// </summary>
public double Semidiameter(SkyContext c)
{
return(LunarEphem.Semidiameter(c.Get(Ecliptical0).Distance));
}
/// <summary>
/// Get position angle of axis for the Moon
/// </summary>
private double PAaxis(SkyContext c)
{
return(LunarEphem.PositionAngleOfAxis(c.JulianDay, c.Get(Ecliptical), c.Epsilon, c.NutationElements.deltaPsi));
}
public void Parallax()
{
double pi = LunarEphem.Parallax(368409.7);
Assert.AreEqual(0.991990, pi, 1e-6);
}
/// <summary>
/// Gets Moon horizontal equatorial parallax
/// </summary>
private double Parallax(SkyContext c)
{
return(LunarEphem.Parallax(c.Get(Ecliptical0).Distance));
}
/// <summary>
/// Gets details of Earth shadow
/// </summary>
private ShadowAppearance EarthShadow(SkyContext c)
{
return(LunarEphem.Shadow(c.JulianDay));
}
/// <summary>
/// Gets nearest max libration date
/// </summary>
private Date NearestMaxLibration(SkyContext c, LibrationEdge e)
{
return(c.GetDate(LunarEphem.NearestMaxLibration(c.JulianDay, e, out double angle)));
}
/// <summary>
/// Gets Brown lunation number
/// </summary>
private int Lunation(SkyContext c)
{
double age = c.Get(Age);
return(LunarEphem.Lunation(c.JulianDay - age));
}
