Fractions of recovered stars as functions of the clustering parameter MCS (all other parameters are kept constant, as shown in Table 2). We show as F1 the fraction of stars assigned to streams as black squares. As F2 we show the fraction of correctly assigned stars in relation to the recovered stars. Finally, as F3 we show the fraction of correctly recovered stars compared to all stars as blue circles. We see that BEACON is indeed able to recover about 20–25% of stars as belonging to streams correctly, even though the data is degraded by errors similar to those in the observational data.