Radial velocity measurements of the primary star along with predicted orbit from the joint MIRC+RV fit (see Table 7). Open symbols represent Hα wing bisector measurements, while filled symbols represent HST measurements from Gies et al. (1998). 1σ error bars have been fixed to ±8.6 km s^-1 as explained in the text. The width of the solid line illustrates the errors on our orbital solution estimated from 100 bootstrap fits. The RV is negative at zero phase because we have chosen an astrometric orbital ephemeris of the secondary relative to the primary, which is opposite in sign to the radial velocity convention, where the velocity of the primary star is measured relative to the center-of-mass.