Marginal phase-space PDFs for UCL/LCC at t = −10.16 Myr, computed by tracing back in time 10 000 realisations of the population. The colour bar is the same for all plots in a row. The red crosses mark projections of the bin where the 6D phase-space PDF reaches its maximum value (~ 1.9 × 10⁻⁶pc⁻³ km⁻³ s³), which arises from 10 040 of the total 5 420 000 pseudostars (~0.2 per cent). From a purely stellar-statistical point of view, a SN at this particular time should have originated from a massive star at approximately this location with approximately this peculiar velocity.