Phase-binned averages of the orbital variations of Kepler-78b at phases 0.25 and 0.75, the extrema of the orbital motion. The circles represents values using data from nights were only two RV measurements were made. The squares represent binned averages from nights where typically 6–10 measurements were made. The solid curve represents the orbital solution to the full HARPS-N data set. The dotted line represents the fit using a subset of the HARPS-N measurements where more than two RV measurements on a night were taken. The long-dashed line represents the best fit sine curve with amplitude K = 2.5 m s^-1 that passes through the RV extrema represented by the circles.