2013ApJ...771L..17B

We used the Navy Precision Optical Interferometer to measure the limb-darkened angular diameter of the exoplanet host star κ CrB and obtained a value of 1.543±0.009 mas. We calculated its physical radius (5.06±0.04 R_☉) and used photometric measurements from the literature with our diameter to determine κ CrB's effective temperature (4788±17 K) and luminosity (12.13±0.09 L_☉). We then placed the star on an Hertzsprung-Russell diagram to ascertain the star's age (3.42_–0.25^+0.32 Gyr) and mass (1.47±0.04 M _☉) using a metallicity of [Fe/H] = +0.15. With this mass, we calculated the system's mass function with the orbital elements from a variety of sources, which produced a range of planetary masses: m_p sin i = 1.61-1.88 M_Jup. We also updated the extent of the habitable zone for the system using our new temperature.