# showing the moon and the earth phase locked in the year x billion AD
# not quite inside a red giant
#

"Earth5b" "Sol"
{
	Class "planet"
	Texture "mars.jpg"   # it's gonna be old and worn out
	
	Color [ 0.85 0.85 1.0 ]
	SpecularColor [ 0.5 0.5 0.55 ]
	SpecularPower 25.0
	HazeColor [ 1 1 1 ]
	HazeDensity 0.3
	Radius 6378

	Atmosphere {
		Height 60
		Lower [ 0.5 0.5 0.65 ]
		Upper [ 0.3 0.3 0.6 ]
		Sky [ 0.3 0.6 0.9 ]
		CloudHeight 7
		CloudSpeed 65
		CloudMap "earth-clouds.png"
	}

	EllipticalOrbit {	
		Period            1.0000  # but should be a trifle smaller
		SemiMajorAxis     1.0000  # ditto
		Eccentricity      0.00001   # smothed out 
		Inclination       0.00001   # and worn down
		AscendingNode   348.739
		LongOfPericenter 102.947
	        MeanLongitude   100.464  # right here and now
	}

	RotationPeriod   1072.8 # 44.7 days (ref 1)
	RotationOffset    280.5    # offset at default epoch J2000
	Obliquity         0.0
	Albedo            0.30
}

"Moon5b" "Sol/Earth5b"
{
	Class "moon"
	Texture "moon5b.jpg"
	BumpMap "moonbump1k.jpg"
	BumpHeight 5.0
	Radius   1737.53
	Oblateness 0.002

	EllipticalOrbit {
# P0		Period           27.321661
# a0		SemiMajorAxis    384400
# P=sqrt (K*a**3) so K0= p0**2/a0**3 = 0.1314208E-13 so a=((p**2)/K0)**1/3
		Period           44.7 # (ref 1)
		SemiMajorAxis    533724.6
		Eccentricity     0.0
		Inclination      0.0
	}

	RotationOffset 		43

	Albedo           0.12
}
#----
# ref 1:
# Dynamical History of the Earth-Moon System, G.A. Krasinski,
#<i>Celestial Mechanics and Dynamical Astronomy</i> <b>84:</b> 25-55, 2002 
#