Minimum radius of model planets for which characterization is possible (see text) for different star types: G2 (top), A0 (middle) and M0 (bottom). We slightly offset for clarity the curves of the 0.8-AU Jupiter (top) and 0.6-AU Jupiter (bottom). Note that for lack of space, we do not indicate the labels for all Earths in the top panel, but they are the same as those of the bottom panel except for the planet separation.