CMD of M 67 (photometry from Yadav et al. 2008) for probable members (P_μ > 60%). The isochrones are taken from the BaSTI library (Pietrinferni et al. 2004). The isochrones in black, dark blue, and light blue correspond to 3.5 Gyr, 4.0 Gyr, and 4.5 Gyr with a reddening E(B − V) = 0.041 ± 0.004 (Taylor 2007). The isochrone in red is a 4.0 Gyr with a lower reddening (E(B − V) = 0.02). The isochrone in orange is a 4.47 Gyr from Girardi et al. (2000) with E(B − V) = 0.041 ± 0.004. The location of the Sun, if it were within M 67, is marked with a ⊙ in yellow.