Comparison of occultation predictions. At this time, the double nature of the star was unknown. The continuous lines represent the predicted path of the centre of the shadow. The 1σ regions along the path are represented by the broken lines. The red diamonds represent the stations that collected data. The grey squares represent the sites that suffered from bad weather or whose data were not used in the analysis. Some stations have been slightly shifted in position for improved visualisation, but the exact coordinates used in the analysis are those in Table C.1.