We present the discovery in Kepler ’ s K 2 mission observations and our follow-up radial velocity observations from Keck/HIRES for four eclipsing binary ( EB ) star systems in the young benchmark Pleiades and Hyades clusters .
Based on our modeling results , we announce two new low mass ( M _ { tot } < 0.6 M _ { \odot } ) EBs among Pleiades members ( HCG 76 and MHO 9 ) and we report on two previously known Pleiades binaries that are also found to be EB systems ( HII 2407 and HD 23642 ) .
We measured the masses of the binary HCG 76 to \lesssim 2.5 % precision , and the radii to \lesssim 4.5 % precision , which together with the precise effective temperatures yield an independent Pleiades distance of 132 \pm 5 pc .
We discuss another EB towards the Pleiades that is a possible but unlikely Pleiades cluster member ( AK II 465 ) .
The two new confirmed Pleiades systems extend the mass range of Pleiades EB components to 0.2–2 M _ { \odot } .
Our initial measurements of the fundamental stellar parameters for the Pleiades EBs are discussed in the context of the current stellar models and the nominal cluster isochrone , finding good agreement with the stellar models of Baraffe et al ( 2015 ) at the nominal Pleiades age of 120 Myr .

Finally , in the Hyades , we report a new low mass eclipsing system ( vA 50 ) that was concurrently discovered and studied by ( ) .
We confirm that the eclipse is likely caused by a Neptune-sized transiting planet , and with the additional radial velocity constraints presented here we improve the constraint on the maximum mass of the planet to be \lesssim 1.2 M _ { \mathrm { Jup } } .