Radial velocity and gri light curve of HAT-P-68

The planet is in a circular P=2.2984day orbit around a moderately bright V=13.937{+/-}0.030magnitude K-dwarf star of mass 0.673_-0.014_^+0.020^M{sun}, and radius 0.6726{+/-}0.0069R{sun}. The planetary nature of this system is confirmed through follow-up transit photometry obtained with the Fred L. Whipple Observatory (FLWO) 1.2m telescope, high-precision radial velocities measured using Keck I/High Resolution Echelle Spectrometer (HIRES), FLWO 1.5m/Tillinghast Reflector Echelle Spectrograph (TRES), and Observatoire de Haute-Provence (OHP) 1.9m/Sophie, and high-spatial-resolution speckle imaging from WIYN 3.5m/DSSI.

HAT-P-68 is at an ecliptic latitude of +3{deg} and outside the field of view of both the NASA Transiting Exoplanet Survey Satellite primary mission and the K2 mission. The large transit depth of 0.036mag (r band) makes HAT-P-68b a promising target for atmospheric characterization via transmission spectroscopy.