Stellar isochrones from Yi et al. (2001) for metallicity [Fe/H] = −0.055 and ages 1.0, 1.4, 1.8, 2.2, 2.6, 3.0, 3.4, and 3.8 Gyr. The final choice of T _eff and a/ R for the circular solution are marked by a filled circle, and is encircled by the 1σ and 2σ confidence ellipsoids (solid, blue lines). The Corresponding values and confidence ellipsoids for the eccentric solution are shown with a triangle and dashed (red) lines.