Comparison of models with the four components of the quadruple system LkCa 3 (Torres et al. 2013). The best-fit isochrone is shown for various sets of models. Present models for an age of 1.6 Myr (solid red). BCAH98 models with for an age of 6.3 Myr (long-dash black). BCAH98 models with for an age of 4 Myr (dot black). The blue dots are for LkCa 3 A and the cyan squares for LkCa 3 B. We adopt a distance d = 127 pc and extinction E(B − V) = 0.10 as in Torres et al. (2013). The numbers close to the red open circles on the solid curve give T_eff and mass (in M_⊙ in the brackets) for a few models.