As far as I know, Vedic astrology thinks that Rahu and Ketu are shadow planets. They dont have a physical planets association. Officailly speaking they dont have any physical planets (doesnt mean they dont have, or it might have changed already).
But the thing is whatever is on the astral plane tends to manifest in the physical plane. Pluto and Uranus could be their manifestations, maybe maybe not. I cant be sure of this yet.