21 Leonis Minoris

21 Leonis Minoris rotates fairly fast for a star; its projected rotational velocity is estimated to be 155 km/s so it must be rotating at least that fast. It has been listed as a fast-rotating spectral standard star for the spectral type of A7V, as opposed to the slow-rotating standard star 2 Hydrae. It is also a Delta Scuti variable, and its apparent magnitude varies from 4.47 to 4.52.

21 Leonis Minoris has an infrared excess, suggesting a debris disk around it. The black body fit has a temperature of 60 K with an orbital radius of 62 AU.