20 Leonis Minoris is a binary star system in the northern constellation of Leo Minor. It is faintly visible to the naked eye, having an apparent visual magnitude of +5.4. Based upon an annual parallax shift of 66.996 mas, it is located 48.7 light-years from the Sun. The star has a relatively high proper motion and is moving away from the Sun with a radial velocity of +56 km/s. The system made its closest approach about 150,000 years ago when it came within 9.86 pc. The primary member of this system is a G-type main-sequence star with a stellar classification of G3 Va Hδ1. It has 12% more mass and a 25% larger radius than the Sun. The star is about seven billion years old and is spinning with a rotation period of 10.6 days. The small companion is an active red dwarf star that has a relatively high metallicity. The two stars are currently separated by 14.5 arc seconds, corresponding to a projected separation of 2016 AU.

Planetary system

A candidate exoplanet orbiting 20 Leonis Minoris A (HD 86728) was first detected in 2020, and confirmed in 2024 as the first discovery of the NEID Earth Twin Survey (NETS). With a minimum mass of and an orbital period of 31 days, this is most likely a hot Neptune-type planet.