Scientifically speaking, Masu is far closer to a comet. It's way too small to be even a dwarf planet because were on a planet, and there's no noticeable gravitational pull. Comets are rocks in space that are too small to be classified as a planet of any kind, so they're just... comets. Any questions?
Credi2Gumba Water meteor. Puts out fire, damages planets. Yours for only £3000401!