15 Leonis Minoris is the Flamsteed designation for a single[13] star in the northern circumpolar constellation of Ursa Major. It has an apparent visual magnitude of 5.08,[3] making it a fifth magnitude star that is visible to the naked eye. Based on parallax measurements, it is located at a distance of 61.7 light years from the Sun. The star has been examined for an infrared excess, but none was detected.[14]
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ursa Major[1] |
| Right ascension | 09h 48m 35.37130s[2] |
| Declination | +46° 01′ 15.6338″[2] |
| Apparent magnitude (V) | 5.08[3] |
| Characteristics | |
| Spectral type | G0 IV-V[4] |
| U−B color index | +0.175[5] |
| B−V color index | 0.619±0.007[3] |
| Astrometry | |
| Radial velocity (Rv) | 5.20±0.09[6] km/s |
| Proper motion (μ) | RA: 221.788[2] mas/yr Dec.: −92.816[2] mas/yr |
| Parallax (π) | 52.8994 ± 0.1260 mas[2] |
| Distance | 61.7 ± 0.1 ly (18.90 ± 0.05 pc) |
| Absolute magnitude (MV) | 3.75[7] |
| Details | |
| Mass | 1.15[8] M☉ |
| Radius | 1.52[9] R☉ |
| Luminosity | 2.912±0.010[2] L☉ |
| Surface gravity (log g) | 4.04[4] cgs |
| Temperature | 5,859[4] K |
| Metallicity [Fe/H] | 0.01[4] dex |
| Rotational velocity (v sin i) | 3.97[10] km/s |
| Age | 9.3[11] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This star has a stellar classification of G0 IV-V[4] with an age of about 9.3 billion years,[11] which suggests that it is an older G-type main sequence star that may be evolving into a subgiant as the hydrogen at its core runs out. The estimated mass of the star is 15% greater than the Sun's mass,[8] and it is larger in girth than the Sun by +52%.[9] It is spinning with a projected rotational velocity of 4 km/s.[10] The star is radiating almost three[2] times the luminosity of the Sun from its photosphere at an effective temperature of 5,859 K,[4] giving it the yellow-hued glow of a G-type star.[15]