Left: recovered albedo and relative error bars as a function of the orbital period for a 19-day rotator for simulations with 39 days with and without stellar activity and with 30 and 60 days in presence of activity. Right: errors of the albedo as a function of the number of stellar rotation observed, for the simulations with P_* = 19 days and observational lengths of 30, 39, and 60 days. Here we also add the error of the 39-day-long simulation,but without stellar activity. For all the considered light curves, the input unmentioned properties are the same as in the caption of Figure 4. In both plots we also added the quantity R_p ∕a as secondary horizontal axis.