Distribution of the assumed masses and the resulting relative standard error of the mass determination for the investigated events. Top panel: using the data of the extended ten-year mission. Middle panel: events with a closest approach after mid 2019. Bottom panel: using only the data from the nominal five-year mission. The grey, red, yellow, and green parts correspond to a relative standard error better than 100%, 50%, 30%, and 15%. The thick black line shows the distribution of the input sample, where the numbers at the top show the number of events in the corresponding bins. The thin black line in the bottom panel shows the events during the nominal mission. The peak at 0.65 M_⊙ is caused by the sample of white dwarfs. The bin size increases by a constant factor of 1.25 from bin to bin.