 The IAU Working Group on Cartographic Coordinates and Rotational Elements recommended a coordinate system, correcting the pole but rotating the Claudian longitude by 150° to coincide with Olbers Regio.It was accepted by the IAU, though it disrupts the maps prepared by the "Dawn" team, which had been positioned so they would not bisect any major surface features.Vesta is the second-most-massive body in the asteroid belt, though only 28% as massive as Ceres.