Kappa Leonis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | 09h 24m 39.25874s |
| Declination | +26° 10′ 56.3650″ |
| Apparent magnitude (V) | 4.460 |
| Characteristics | |
| Spectral type | K2 III |
| U−B color index | +1.31 |
| B−V color index | +1.23 |
| Astrometry | |
| Radial velocity (Rv) | +27.94 km/s |
| Proper motion (μ) | RA: –31.64 mas/yr Dec.: –48.20 mas/yr |
| Parallax (π) | 16.20±0.21 mas |
| Distance | 201 ± 3 ly (61.7 ± 0.8 pc) |
| Absolute magnitude (MV) | 0.66±0.028 |
| Details | |
| Mass | 1.44 M☉ |
| Radius | 17 R☉ |
| Luminosity | 89 L☉ |
| Surface gravity (log g) | 2.34 cgs |
| Temperature | 4,403±24 K |
| Metallicity [Fe/H] | +0.01 dex |
| Rotational velocity (v sin i) | 10 km/s |
| Age | 4.33 Gyr |
| Other designations | |
| Al Min'ħar al A'sad, κ Leo, 1 Leo, BD+26°1939, FK5 1244, HD 81146, HIP 46146, HR 3731, SAO 80807 | |
| Database references | |
| SIMBAD | data |
Kappa Leonis, Latinized from κ Leonis, is a double star in the constellation Leo. It was called Al-minħar al-asad (Arabic: المنخر الأسد), meaning "the Lion's nose." The name is corrupted to Al Minliar al Asad in the Yale Bright Star Catalogue. This star is visible to the naked eye with an apparent visual magnitude of 4.46. It has an annual parallax shift of 16.20 mas as seen from Earth, which provides a distance estimate of about 201 light years. Kappa Leonis is moving away from the Sun with a radial velocity of +28 km/s.
The primary component is an evolved K-type giant star with a stellar classification of K2 III. It is about the same age as the Sun with an estimated 144% of the Sun's mass and has expanded to 17 times the Sun's girth. It is radiating 89 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,400 K.
Kappa Leonis has a magnitude 10.4 companion at an angular separation of 2.1 arc seconds. The pair most likely form a binary star system. The companion is a suspected variable star.