private double SaturnMoon_DistanceFromEarth(SkyContext c, int m)
{
double r = c.Get(Planet_DistanceFromEarth, Planet.SATURN);
double z = c.Get(SaturnMoon_Rectangular, m).Z;
return(SaturnianMoons.DistanceFromEarth(r, z));
}
private float SaturnMoon_Magnitude(SkyContext c, int m)
{
double r = c.Get(Planet_DistanceFromEarth, Planet.SATURN);
double R = c.Get(Planet_DistanceFromSun, Planet.SATURN);
return(SaturnianMoons.Magnitude(r, R, m - 1));
}
private CrdsRectangular[] SaturnMoons_Positions(SkyContext c)
{
CrdsHeliocentrical earth = c.Get(Earth_Heliocentrial);
CrdsHeliocentrical saturn = c.Get(Planet_Heliocentrical, Planet.SATURN);
return(SaturnianMoons.Positions(c.JulianDay, earth, saturn));
}
private double SaturnMoon_Semidiameter(SkyContext c, int m)
{
// distance from Earth to Saturn, in a.u.
double r = c.Get(Planet_DistanceFromEarth, Planet.SATURN);
// planetocentric z-coordinate of moon
double z = c.Get(SaturnMoon_Rectangular, m).Z;
// visible moon semidiameter
return(SaturnianMoons.MoonSemidiameter(r, z, m - 1));
}
