Orbit of the companion Gaia…6464 B. The original Gaia orbit is shown in black. The refined orbit resulting from the combination of the Gaia solution and the astrometric position measurement provided by GRAVITY is shown in dark green. The light green shows a random subset of the sampled solutions probed during the MCMC run. The blue dot indicates the GRAVITY measurement with the ellipse describing the associated uncertainty. On the main plot, the black circle shows the position of the companion at the time of the observation as predicted by the Gaia-only orbital solution. On the inner plot, the green circle shows the position of the companion from the refined orbital solution including the GRAVITY observation.