Proper motion anomaly sensitivity for companion detections as a function of orbital separation, for π¹ Gru, assuming a 1.5 M_⊙ primary at 162 pc, and a tangential PMa of 6.07±0.33 km s⁻¹. The thick green line shows the sensitivity for a face-on system, and the green shaded area represents the range of inclinations. Blue lines at the bottom indicate the corresponding orbital period (in years) for a circular orbit.