Now, wait a minute...Ceres, Pallas, Juno and Vesta were discovered between 1801 and 1804, about 40 years BEFORE Neptune was discovered.
This meant for almost half a century, Ceres, Vesta, Pallas and Juno were called and considered Planets.
Once Neptune was found, much larger and much further than Uranus, something had to change. And those 4 became either planetoids or asteroids.
Same for Pluto: discovered in 1930, it hasn't stopped shrinking since, even becoming 2 worlds! And then
KPO's were discovered only a few years ago, in exactly the same kind of orbit as Pluto, one of them even being just a fraction smaller than Pluto.
It's so reminiscent of the Neptune discovery; I can't help but think Pluto's status will have to be adapted consequently.

Raoul