Pluto-Charon barycentric system
Posted: 31.03.2003, 15:01
Here's the final definition for Pluto and Charon in mutual orbit around their barycentre - slight changes from my original back-of-the-envelope effort, but nothing dramatic.
You'll need to download my empty.3ds invisible object for the barycentre itself. It's on Selden's website at http://www.lns.cornell.edu/~seb/celestia/hutchison/empty.3ds, and comes in at a massive 1K (when did Rass' or Fridger ever offer you anything useful that didn't take all night to download, eh?
).
Grant
PS: I've now re-edited the code above to remove the RotationPeriod definitions, which are unnecessary - Pluto and Charon remain synched on the barycentre once they're set up correctly.
You'll need to download my empty.3ds invisible object for the barycentre itself. It's on Selden's website at http://www.lns.cornell.edu/~seb/celestia/hutchison/empty.3ds, and comes in at a massive 1K (when did Rass' or Fridger ever offer you anything useful that didn't take all night to download, eh?
).
Code: Select all
"Pluto-Charon" "Sol"
{
Mesh "empty.3ds"
Color [ 0 0 0 ]
Radius 1500
CustomOrbit "pluto"
EllipticalOrbit
{
Period 248.54
SemiMajorAxis 39.48168677
Eccentricity 0.24880766
Inclination 17.14175
AscendingNode 110.30347
LongOfPericenter 224.06776
MeanLongitude 238.92881
}
Albedo 1.0
}
"Pluto" "Sol/Pluto-Charon"
{
Texture "pluto.jpg"
BumpMap "plutobump1k.jpg"
BumpHeight 2.5
Radius 1137
EllipticalOrbit
{
Period 6.387246
SemiMajorAxis 1499
Eccentricity 0.0002
Inclination 115.602
AscendingNode 228.328
ArgOfPericenter 47.314
MeanAnomaly 93.440
}
Obliquity 115.6
EquatorAscendingNode 228.3
RotationOffset 320.8
Albedo 0.55
}
"Charon" "Sol/Pluto-Charon"
{
Texture "charon.jpg"
Radius 586
InfoURL "http://www.nineplanets.org/pluto.html#Charon"
EllipticalOrbit
{
Period 6.387246
SemiMajorAxis 17906
Eccentricity 0.0002
Inclination 115.602
AscendingNode 228.328
ArgOfPericenter 227.314
MeanAnomaly 93.440
}
Obliquity 115.9
EquatorAscendingNode 227.3
RotationOffset 140.4
Albedo 0.35
}
Grant
PS: I've now re-edited the code above to remove the RotationPeriod definitions, which are unnecessary - Pluto and Charon remain synched on the barycentre once they're set up correctly.
Anyways cheers on that grant...Nice modding work