An on-going effort in the characterization of exoplanetary systems is the accurate determination of host star properties .
This effort extends to the relatively bright host stars of planets discovered with the radial velocity method .
The Transit Ephemeris Refinement and Monitoring Survey ( TERMS ) is aiding in these efforts as part of its observational campaign for exoplanet host stars .
One of the first known systems is that of 70 Virginis , which harbors a jovian planet in an eccentric orbit .
Here we present a complete characterization of this system with a compilation of TERMS photometry , spectroscopy , and interferometry .
We provide fundamental properties of the host star through direct interferometric measurements of the radius ( 1.5 % uncertainty ) and through spectroscopic analysis .
We combined 59 new Keck HIRES radial velocity measurements with the 169 previously published from the ELODIE , Hamilton , and HIRES spectrographs , to calculate a refined orbital solution and construct a transit ephemeris for the planet .
These newly determined system characteristics are used to describe the Habitable Zone of the system with a discussion of possible additional planets and related stability simulations .
Finally , we present 19 years of precision robotic photometry that constrain stellar activity and rule out central planetary transits for a Jupiter-radius planet at the 5 \sigma level , with reduced significance down to an impact parameter of b = 0.95 .