private CometAppearance Appearance(SkyContext ctx, Comet c)
{
double r = ctx.Get(DistanceFromSun, c);
double delta = ctx.Get(DistanceFromEarth, c);
return(MinorBodyEphem.CometAppearance(c.H, c.G, r, delta));
}
protected double PhaseAngle(SkyContext c, T body)
{
double delta = c.Get(DistanceFromEarth, body);
double r = c.Get(DistanceFromSun, body);
double R = c.Get(EarthDistanceFromSun);
return(MinorBodyEphem.PhaseAngle(r, delta, R));
}
public float Magnitude(SkyContext c, Asteroid a)
{
double delta = c.Get(DistanceFromEarth, a);
double r = c.Get(DistanceFromSun, a);
double beta = c.Get(PhaseAngle, a);
return(MinorBodyEphem.Magnitude(a.G, a.H, beta, r, delta));
}
private double Semidiameter(SkyContext c, Asteroid a)
{
double delta = c.Get(DistanceFromEarth, a);
return(MinorBodyEphem.Semidiameter(delta, a.PhysicalDiameter));
}
