Pluto was demoted from a planet to a dwarf planet in 2006 – This is when the IAU formalised the definition of a planet as “a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.”
Nothing better than a new PV for a new vaporer! My niece!