Minimum area traceback. Left: minimum spanning tree total length as a function of traceback time with no filter for outliers (red), 3σ velocity outliers removed (green), 2σ velocity outliers removed (blue), and 32% of the longest branches removed (black) and with their respective uncertainties. Right: sum of distances for each star to the association centre as a function of traceback time with no filter for outliers (red), 3σ velocity outliers removed (green), and 2σ velocity outliers removed (blue).