TYC 4144 329 system plotted on theoretical isochrones. Isochrones were obtained from the CMD 2.1 webform ( http://stev.oapd.inaf.it/cmd) and all have metallicity of [Fe/H] =−0.2. The solid isochrone represents our best-fit age for the TYC 4144 329 system: 930 Myr. The two dot-dashed isochrones are for ages of 794 Myr and 1027 Myr. TYC 4144 329 1 is the point near T _eff of 3.7 and L of 1.5, while TYC 4144 329 2 is the point near T _eff of 3.85 and L of 1.6. Exact values of effective temperature and luminosity and their associated errors can be found in Table 3.