Eccentricity vs. period of binary stars and RV planets. Gray dots correspond to binary stars (Pourbaix et al. 2004) and blue dots to RV planets. The red triangle and green square indicate HD 103891 and HD 105779, respectively. Black and pink circles represent the median values of eccentricities in the range <3 days, 3–30 days, 30–300 days, 300–3 000 days and >3 000 days for binary stars and planets, respectively.