Lagrange points orbit definition

General discussion about Celestia that doesn't fit into other forums.
Topic author
Calculus
Posts: 216
Joined: 19.10.2002
With us: 22 years 1 month
Location: NY

Lagrange points orbit definition

Post #1by Calculus » 13.04.2003, 18:05

Has anyone tried to model all the Lagrange points of a planet ?
Is is possible to have accurate orbits definition of them in a ssc file ?
It is quite easy with the elliptic orbits, but is it possible with custom orbits ? Any idea Grant for the Earth Sun system, or Earth Moon system ?
Thanks
---Paul
My Gallery of Celestial Phenomena:
http://www.celestiaproject.net/gallery/view_al ... e=Calculus

granthutchison
Developer
Posts: 1863
Joined: 21.11.2002
With us: 22 years

Post #2by granthutchison » 13.04.2003, 18:46

The moon would be difficult, since its orbit changes over a relatively short time period. I did once have the notion of placing objects at the Earth/Moon L4 and L5 by creating dummy "Earths" inside the real Earth, with their EquatorAscendingNodes set to 60 and -60. Place objects in orbit around these with CustomOrbit "moon", and they'll be displaced 60 degrees either side of the real Moon.

For planet/Sun Lagrange points, the CustomOrbits don't evolve very quickly, and you can produce acceptable results over many years using the plain elliptical elements - just variations on what I've done with the Mars mirrors and the Venus parasol on other threads.

Grant


Return to “Celestia Users”