  Roughly half of Solar-type planet hosts have stellar companions, so
understanding how these binary companions affect the formation and evolution of
planets is an important component to understanding planetary systems overall.
Measuring the dynamical properties of planet host binaries enables a valuable
test of planet formation in multi-star systems and requires knowledge of the
binary orbital parameters. Using high resolution imaging, we have measured the
relative astrometry and visual orbits of 13 binary systems where one of the
stars is known to host a transiting exoplanet. Our results indicate that the
mutual inclination between the orbits of the binary hosts and the transiting
planets are well aligned. Our results for close binary systems (a<100 AU)
complement past work for wide planet host binaries from Gaia.
