• Outermost satellite of Saturn, discovered by Pickering in 1898 in an orbit taking 550 days to travel, an average of 12.9 million km from the planet. Phoebe is in a steeply inclined orbit to the general plane of Saturn’s rings, its rotation, and its other satellites, and seems to be some 150km across Phoebe is dark, unlike the ice worlds of the inner Saturnian system, and may be a captured object from the outer solar system. Dark material blasted by impact from the surface of Phoebe has been cited as a possible cause of the dark area on the surface of Iapetus, the next satellite towards Saturn after Phoebe.