Top panel: distribution of the orbital-pole positions on the sky, drawn from the normal distributions for i = 54.9° ± 2.4° and Ω = 13.5° ± 2.3° corresponding to the benchmark system WDS 00057+4549. The intersection of the dashed lines marks the nominal pole position. As expected, the distribution is centred on this nominal position. Bottom panel: histograms corresponding to the longitude and latitude distributions. The dashed lines correspond to Gaussian distributions centred on the nominal pole position, with standard deviations of 2.3° and 2.0° in Galactic longitude and latitude, respectively.