Hi, I haven't seen Cruithne or any other co-orbital asteroids available - although I can recomend Nighthawke's
asteroids add-on available at SpaceSimMods. But why not have a go at making it yourself? You could just re-name a
suitable mesh (and associated texture .dds file) - you could use the deimos or phobos mesh/textures that come with
Orbiter - to Cruithne. Then you need to make the Cruithne.cfg file that contains the physical and orbital data - easiest
way is to copy another asteroid .cfg and adjust it to the correct values for Cruithne. And then add Cruithne to your
sol.cfg as another planet.
However, you won't see the interesting orbital behaviour (horseshoe orbits etc) - in Orbiter the orbit will not change
from the ellipse specified in the Cruithne.cfg. To see that, you would need to classify Cruithne as a "Vessel" rather
than a "planet" - it will then be subject to the various gravitational influences that cause Cruithne's orbit to change.
Having said all that, the time scales invloved are so long that even at max time accel, you will need to run the sim for
an awfully long time to see the "horseshoe orbit" phenomenon (I think).
If you haven't seen it already, Tony Dunn's "GravitySimulator" program is better suited to showing this kind of orbital
behaviour -
www.orbitsimulator.comBut if you want to fly there in a DeltaGlider, there's only one program that'll do that for you!
All the best,
BrianJ