Actually, it isnt the definition of the object that needs debating, it's the definition itself. The word "Planet" comes from greek and means "Wanderer", given to those celestial bodies that the ancients noticed moved or wandered around the skies. So given that information every object not "fixed" from earths perspective is a planet, including every rock in any belt out there. Now what we need to do is define the term, stop calling all of them planets and find a more fitting term that seperates large orbiting bodies from small ones. Time we updated the Astronomical distionary and put this BS to bed.