Fraction of clusters undetected by this work when compared to various literature works or series of literature works, shown as a histogram of various parameters as a solid blue line for all clusters in the catalogue, and a dashed grey line for clusters in the high quality sample defined in Sect. 7.1. The dashed orange lines show the number of clusters in each bin. Optimum histogram bin widths were selected automatically using numpy (Harris et al. 2020). From left to right, each column shows the number of stars N, distance d, age log t and extinction A_x reported in each catalogue. For the top four groups of catalogues, extinctions were given in the V band. For the lower two, extinctions were given in Gaia’sG band, which are generally slightly lower.