Variations of the object’s z-axis and spin-vector orientation during a full rotation of 30.56 h, starting about 26 h before the first Herschel measurement and ending about 2 h after the last measurement. The epochs of the Herschel observations (from Table 1) are shown as diamonts. The z axis (dashed line) is connected to the largest moment of inertia in the asteroid’s co-rotating coordinate frame, the solid line shows how the orientation of the object’s spin axis changes with time. Top: covering the first observations on Jan. 6, 2013; bottom: covering the second observation on Mar. 14, 2013.