Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Leo |
Right ascension | 11h 05m 01.02754s[1] |
Declination | +07° 20′ 09.6235″[1] |
Apparent magnitude (V) | 4.63[2] |
Characteristics | |
Spectral type | F2III-IVv[3] |
U−B color index | +0.06[2] |
B−V color index | +0.33[2] |
Astrometry | |
Radial velocity (Rv) | +4.7[4] km/s |
Proper motion (μ) | RA: −344.28[1] mas/yr Dec.: −47.65[1] mas/yr |
Parallax (π) | 34.49 ± 0.20 mas[1] |
Distance | 94.6 ± 0.5 ly (29.0 ± 0.2 pc) |
Absolute magnitude (MV) | +2.31[5] |
Details | |
Mass | 1.62[6] M☉ |
Radius | 1.99[7] R☉ |
Luminosity | 9.9[5] L☉ |
Surface gravity (log g) | 4.02[6] cgs |
Temperature | 7022±80[6] K |
Metallicity [Fe/H] | +0.03[6] dex |
Rotational velocity (v sin i) | 25±1[3] km/s |
Age | 1.40[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Chi Leonis, Latinized from χ Leonis, is a double star in the constellation Leo. It is visible to the naked eye with an apparent visual magnitude of 4.63.[2] The distance to this star, as determined using parallax measurements,[1] is around 95 light years. It has an annual proper motion of 346 mas.[9]
This is most likely a binary star system.[10] The primary component is an evolved, F-type giant star with a stellar classification of F2III-IVv.[3] It has an estimated 162%[6] of the Sun's mass and nearly twice the Sun's radius.[7] The companion is a magnitude 11.0 star at an angular separation of 4.1″ along a position angle of 264°, as of 1990.[11]