[hunterb123]

Chiron is a planet.

Chiron is a comet.

"Wikipedia" agrees with both of those statements.

Since it cannot be both, "Wikipedia" also agrees with the statements that Chiron is not a comet and is not a planet.

tldr: we don't know, it could be either

[adolph]

2060 Chiron /ˈkaɪərɒn/ is a small Solar System body in the outer Solar System, orbiting the Sun between Saturn and Uranus. Discovered in 1977 by Charles Kowal, it was the first-identified member of a new class of objects now known as centaurs—bodies orbiting between the asteroid belt and the Kuiper belt.

https://en.wikipedia.org/wiki/2060_Chiron

In Greek mythology, Chiron (/ˈkaɪrən/ KY-rən; also Cheiron or Kheiron; Ancient Greek: Χείρων means 'hand') was held to be the superlative centaur amongst his brethren since he was called the "wisest and justest of all the centaurs".

https://en.wikipedia.org/wiki/Chiron

Chiron – A centaur with a white stallion body[9] and a son of Kronos. He is the mentor of Percy Jackson and the activities director at Camp Half-Blood. In The Lightning Thief, he first appears, disguised as a Latin teacher at Percy's school. He uses an enchanted wheelchair to conceal his horse half.[7] Chiron is played by Pierce Brosnan in the first film and by Anthony Head in the second film. In the musical, he is portrayed by Jonathan Raviv.

https://en.wikipedia.org/wiki/List_of_characters_in_mytholog...

[codezero]

Also, it's fair to say systems based on classification based on subjective criteria will always have grey area, so any absolute statement about them will be difficult to defend :)