HR diagram showing evolutionary tracks for 1.5, 1.6, and 1.7 M_⊙. Models were computed using [Fe/H] = −0.08 dex, α_ML = 0.5, and d_ov = 0.2 from the pre-main sequence phase (dashed line) to the end of the main sequence (solid line). They included OPAL opacity tables and Eddington atmospheres. The position of HD 174966 and the spectroscopic 1σ uncertainty box derived in this work are also shown (see Table 2).