Error on the peak-height ratios (top) and latitudes (bottom) as a function of the latitude of the second spot. Black and red symbols concern spots 1 and 2, respectively. The left panels correspond to L₁ = 40°, while the right panels show the results for . The yellow areas mark the latitude intervals where only one rotation period was detected. Here we disregarded the cases in which the peak-height ratios were outside the one-spot peak-height ratio range given in Fig. 2.