Evolutionary status of the components of RS Cha in a Hertzsprung-Russell diagram. The grey lines show the evolutionary tracks of 1.6 M_⊙–2.0 M_⊙ stars towards the end of their pre-main sequence phase. The blue and red box shows the observational constraints for the primary and secondary respectively. Also shown are evolutionary tracks corresponding to masses reported by Alecian et al. (2005) that reproduce the observed radius at their final point (marked with a dot) for the primary (blue) and secondary (red). The green dash-dotted line marks the point of evolution where the central C¹² mass fraction drops below 10⁻⁴.