Arcane Gazebo

Advances in the Field of Science: Negative Planet Discovered

On Pi Day I linked to news of the discovery of a planet planetoid object orbiting the Sun. It seems that the problem of classifying Sedna has reignited the debate over whether Pluto should be classified a planet.

My question: Suppose the discovery of Sedna results in Pluto's planetary status being revoked. Is it then correct to say that we have discovered negative one planet?

(I'd also like to note that the article quotes astronomers from both Caltech and UC Berkeley, thereby allowing me to feel a deep but illusory connection with the story.)