Stellar isochrones from Yi et al. (2001) for metallicity [Fe/H] = +0.17 and ages 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, and 9.0 Gyr. The final choice of T _eff and a/ R for the circular solution is 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. Fits from method B.