Observational Hertzsprung–Russell diagram. The sample of 1120 M dwarf primaries within 25 pc from Winters et al. (2019) is plotted as black points. L 98-59 is noted as a blue star. For comparison, known close multiples with separations less than 5″ having blended photometry (red points), known cool subdwarfs (open green squares), and known young objects (open cyan diamonds) are noted. Error bars are shown in gray and are smaller than the points, in most cases.