Posterior orbits for each of the 13 vetted calibrators from Table 2. Each panel illustrates a set of 20 orbits drawn from our posterior distributions of orbital parameters (in blue), as well as the coverage offered by our combined WDS (yellow bubbles) and GRAVITY (red crosses) astrometry. The grey star provides a visual reference of the (0, 0) coordinate origin. For each target, an inset shows the details of the GRAVITY measurements.