10 Leonis Minoris

10 Leonis Minoris is a single^[13] variable star in the northern constellation Leo Minor, located approximately 191 light years away based on parallax. It has the variable star designation SU Leonis Minoris; 10 Leonis Minoris is the Flamsteed designation. This body is visible to the naked eye as a faint, orange-hued star with a baseline apparent visual magnitude of 4.54.^[2] It is moving closer to the Earth with a heliocentric radial velocity of −12 km/s.^[6]

A near-infrared (y band) light curve for SU Leonis Minoris, adapted from Skiff and Lockwood (1986)^[14]

10 Leonis Minoris

Location of 10 Leonis Minoris (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Leo Minor
Right ascension	09h 34m 13.38184s[1]
Declination	36° 23′ 51.2090″[1]
Apparent magnitude (V)	4.54[2]
Characteristics
Spectral type	G8.5 III[3]
U−B color index	+0.61[4]
B−V color index	+0.92[4]
Variable type	RS CVn[5]
Astrometry
Radial velocity (Rv)	−11.94[6] km/s
Proper motion (μ)	RA: +6.989[1] mas/yr Dec.: −22.729[1] mas/yr
Parallax (π)	17.0738±0.1341 mas[1]
Distance	191 ± 2 ly (58.6 ± 0.5 pc)
Absolute magnitude (MV)	0.83[7]
Details
Mass	2.54[8] M☉
Radius	8.74±0.29[9] R☉
Luminosity	46.44±1.65[9] L☉
Surface gravity (log g)	2.93[10] cgs
Temperature	5,099[8] K
Metallicity [Fe/H]	−0.04[10] dex
Rotational velocity (v sin i)	4.7[11] km/s
Other designations
10 LMi, SU Leonis Minoris, BD+37°2004, FK5 360, GC 13203, HD 82635, HIP 46952, HR 3800, SAO 61570[12]
Database references
SIMBAD	data

This is an evolved giant star with a stellar classification of G8.5 III.^[3] It is reported as a RS CVn variable with magnitude varying by 0.02 mag.^[5] and showing a high level of chromospheric activity.^[15] The star has 2.54 times the mass of the Sun and has expanded to 8.7 times the Sun's radius. It is radiating 46 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,099 K.^[8][9]