Pholus

Asteroid 5145, diameter 190 km, discovered in 1991. It follows a highly unusual, remote orbit, on which it ranges between 8.7 and 32 AU from the Sun. With Chiron, and five other asteroids in orbits with similar characteristics, it forms the group termed Centaurs. Pholus has a low albedo of 4.4 per cent, and is very much redder in colour than typical asteroids.