How to make a rotating particle disc around a binary?

[francob]

...to find regions of orbital stability for exoplanets.
If you add a ring to the barycentre of a binary, does it rotate?
On planets it does, but on this barycentre it seem to be static.

[Dan Dixon]

No easy way to do this... I suspect what you're doing should work, but support for this was never added.

The way to do it would be:
You could create a body at the barycenter with the combined properties of the other bodies, add a ring around that, and then delete this body, but that's not ideal.

We'll make a point of adding support for this in the sequel.