Well... It's probably premature to call any of those things planets. There's a more or less permanent ongoing debate about what deserves to be called a planet, and there are those who'd argue Pluto should be downgraded too, because its orbital eccentricity is so much greater than any other planet's and it moves quite far outside the approximate plane defined by the orbits of the others.
But there's an official organization that decides these things, and it has yet to make definitive pronouncements. I'd be tempted to call them all planets just to mess up the astrologers.
But there's an official organization that decides these things, and it has yet to make definitive pronouncements. I'd be tempted to call them all planets just to mess up the astrologers.