Fig. 3
Comparison of the KOALA shape model of (21) Lutetia to the contours extracted on the adaptive-optics images. Each vertex of the shape model is represented by a gray dot, with the exception of limb/terminator vertices, which are drawn as black dots. The median AO-contour for each epoch is plotted as a solid gray line, and the 3σ deviation area is delimited by the dotted gray lines. We report the observing time (in UT), sub-Earth point (SEP), sub-solar point (SSP) coordinates and Pole Angle (PA: defined as the angle in the plane of the sky between celestial north and the projected asteroid spin-vector, measured counter-clockwise, from north through east) on each frame.
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