Here's Celestia's SSC catalog that i used.
It'd be more appropriate for the world to be orbiting around some other star, of course, with its own orbit, year and day lengths.
Code:
"World" "Sun"
{
Radius 6453.229 # km; circ = 40546.8 km
Texture "world.*"
EllipticalOrbit { SemiMajorAxis 1 Period 1}
UniformRotation
{
Period 24
Inclination 20
}
}
AltSurface "Relief" "Sun/World"
{
Texture "relief.*"
}
AltSurface "MeanTemp" "Sun/World"
{
Texture "mean_temp.*"
}
AltSurface "AvgRainfall" "Sun/World"
{
Texture "avg_rainfall.*"
}
AltSurface "Zoom" "Sun/World"
{
Texture "zoom.*"
}
AltSurface "Color" "Sun/World"
{
Texture "World_Color1.*"
}