"So Pluto is a Kuiper belt object, a plutino (the unofficial but nearly universally accepted name for objects in the 2:3 resonance with Neptune), a dwarf planet, and now also a plutoid?" he said. "If the IAU is trying to make things more clear, I think it needs to try again. This is just another layer of confusion that will feed the "pluto is a planet" camp at the [Johns Hopkings] meeting."
Kortenkamp also thinks the new defiinition leaves Ceres up in the air: "And this "-oid" classification doesn't apply to Ceres?" he asks. "Okay, so does that means we continue calling Ceres an ASTERoid?"
I believe that both "plutoids" and large "asteroids/planetoids" are "dwarf planets".
So Pluto is
1 - a dwarf planet
2 - a plutoid (any object trans neputian object that's also a dwarf planet is a plutoid)
3 - a plutino
4 - a Kuiper belt objects
5 - a planetoid (which traditionally meant the same as an asteroid, but includes any object that orbits the sun that isn't a planet or a comet)
6 - a minor planet (pretty much the same as the more expansive defition of planetoid, it includes both "dwarf planets", and "small solar system bodys"
7 - a "trans-Neptunian object" (orbits beyond Neptune, this group includes, in order from closet to furthers, Kuiper belt objects, scattered disk objects, and Oort Cloud objects)
While Ceres is
1 - an asteroid
2 - a main belt astroid
2 - a planetoid
3 - a dwarf planet
10 Hygiea (the forth biggest object in the asteroid belt)
1 - an asteroid
2 - a main belt astroid
3 - a plantoid
4 - a small solar system body
90377 Sedna (the furthest known dwarf planet candidate)
1 - a planetoid
2 - a "dwarf planet candidate" (it can be argued if it should be called a dwarf planet or a small solar system body)
3 - a "trans-Neptunian object"
4 - an Oort cloud object
Eris (the largest known dwarf planet, its bigger than Pluto)
1 - a dwarf planet
2 - a planetoid
3 - a trans-Neputnian object
4 - a "scattered disk object"
5 - a plutoid |
