Color–magnitude diagrams describing entries in RMSTAR. Panel (a) shows all sources in Gaia DR3 within 25 pc and with absolute Gaia magnitude M_G ≥ 8.1. Grey points represent M dwarfs from Gaia DR3, pink points represent white dwarfs or M dwarfs with white dwarf companions, blue points represent sources that were removed because of poor parallax measurements, and green points represent sources that were removed because they have higher mass stellar companions, as discussed in Section 2.3. Panel (b) shows all primary stars in the RMSTAR catalog colored by the source of each stars’ astrometric data, including those from GDR3 (gray), GDR2 (magenta), Hipparcos (green), and RECONS/other literature sources (orange). Panel (c) shows all primaries (gray) and wide companions (purple) in the RMSTAR 2026 catalog.