Pholus

Pholus is a Centaur object, a type of small body in the outer solar system that is similar in size to asteroids but composed like comets. Discovered in 1992, Pholus orbits the Sun mainly between Jupiter and Neptune. Centaurs are believed to originate from the Kuiper belt and are influenced by Neptune's gravity, leading to unstable orbits. Due to their unstable paths, Centaurs have a short astronomical lifespan, with their population constantly replenished from the Kuiper belt. At their great distance from the Sun, the distinction between asteroids and comets can become unclear, as icy bodies like Centaurs may not exhibit cometary activity.1