Comparison of the osculating semi-major axis a₁ (bottom) and eccentricity e₁ evolution (middle) as computed by our N-body model for two mirror solutions with Ω₁ ≃ 331° (bold solid) and (red dashed). Only a short time span of 12 days is shown, close to the epoch T₀. The corresponding ETVs of minima observed by MOST are also shown at the top. The former solution Ω₁ ≃ 331° has the corresponding (for all N_etv = 35 measurements) significantly lower than the latter, 150 vs. 390, so that we consider it as the preferred value.