Fit of the orbit of HD89839. Top left: Fit of the HD89839 RV measurements. Top right: Fit of the HD89839 astrometric acceleration in right ascension (left) and declination (right). The black points correspond to the HIPPARCOS and Gaia EDR3 proper motion measurements. In each plot, the black curve corresponds to the best fit. The color bar indicates the log-likelihood corresponding to the different fits plotted. Bottom: Corner plot of the fitted parameters of HD89839 b, considering a prior on I between 0 and 90°. An offset of 31.7 km/s is subtracted from V0 (H03) and V1 (H15) to improve readability.