Hi Anthony,
I dont think there is a property set on it to retrieve, but here is some discussion on it from the past:

http://moi3d.com/forum/lmessages.php?webtag=MOI&msg=3042.13

Also, the conic command will accept a "Negative Value!" for going the other way on an existing conic. You may be much better at the math to get a perfect ellipses out of an existing conic as opposed to some type of parab/hyperparab or something...

Interestingly enough, if you do a negative rho on an existing conic, then turn on control points for both, you get a triangle!!