Detectability conditions for the targets with P_detect>25% in 3 h of integration. Left panels show the simulated orbits of each planet (black lines) assuming A_ɡ=0.3. Coloured lines show the detectability limits of the interferometer at each spectral band with the current VLTI (solid lines) and the extended VLTI (dotted lines) baselines, for a S/N=3 in 3 h of integration. The histograms on the right panels show the range of α_obs at each band with the extended VLTI configuration.