H-R diagram for 2042 CDDS field stars. The light-blue (lime, fuchsia) curves shows the PARSEC 1.2S isochrone for [Fe/H] = 0 and an age of 30 Myr (200 Myr, 4.5 Gyr). The lower bound of the light-blue and light-green curves for T_eff ≳ 10,000 K marks the approximate ZAMS; all CDDS stars lie near or above this locus. Nearly all cooler stars lie near the 200 Myr isochrone; others lie on the giant branch.