Prixion is an asteroid captured in Supirion's orbit. It is a dead body with no magnetic field of its own and very little atmosphere, composed of iron, rock, iridium, silicon, and carbon. It has an irregular orbit. It is inhabited by the flints and the kristils, who are smilans and bugers exiled from Supirion who mutated after prolonged exposure to cosmic rays. Prixion still shared in the magnetic field of other bodies in the planetary system, however, though it was known that the body would eventually break away into space and that its inhabitants would freeze, fry, and die, adding impetus to the flints' vendetta against Supirion.