Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Leo |
Right ascension | 09h 24m 39.25874s [1] |
Declination | +26° 10′ 56.3650″ [1] |
Apparent magnitude (V) | 4.460 [2] |
Characteristics | |
Spectral type | K2 III [2] |
U−B color index | +1.31 [3] |
B−V color index | +1.23 [3] |
Astrometry | |
Radial velocity (Rv) | +27.94 [4] km/s |
Proper motion (μ) |
RA: –31.64
[1]
mas/
yr Dec.: –48.20 [1] mas/ yr |
Parallax (π) | 16.20 ± 0.21 mas [1] |
Distance | 201 ± 3
ly (61.7 ± 0.8 pc) |
Absolute magnitude (MV) | 0.66±0.028 [5] |
Details | |
Mass | 1.44 [2] M☉ |
Radius | 17 [6] R☉ |
Luminosity | 89 [2] L☉ |
Surface gravity (log g) | 2.34 [7] cgs |
Temperature | 4,403±24 [2] K |
Metallicity [Fe/H] | +0.01 [7] dex |
Rotational velocity (v sin i) | 10 [8] km/s |
Age | 4.33 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Kappa Leonis, Latinized from κ Leonis, is a double star in the constellation Leo. [9] It was called Al-minħar al-asad ( Arabic: المنخر الأسد), meaning "the Lion's nose." [10] The name is corrupted to Al Minliar al Asad in the Yale Bright Star Catalogue. [11] This star is visible to the naked eye with an apparent visual magnitude of 4.46. [2] 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. [4]
The primary component is an evolved K-type giant star with a stellar classification of K2 III. [2] It is about the same age as the Sun with an estimated 144% [2] of the Sun's mass and has expanded to 17 [6] times the Sun's girth. It is radiating 89 [2] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,400 K. [2]
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. [12] The companion is a suspected variable star. [13]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Leo |
Right ascension | 09h 24m 39.25874s [1] |
Declination | +26° 10′ 56.3650″ [1] |
Apparent magnitude (V) | 4.460 [2] |
Characteristics | |
Spectral type | K2 III [2] |
U−B color index | +1.31 [3] |
B−V color index | +1.23 [3] |
Astrometry | |
Radial velocity (Rv) | +27.94 [4] km/s |
Proper motion (μ) |
RA: –31.64
[1]
mas/
yr Dec.: –48.20 [1] mas/ yr |
Parallax (π) | 16.20 ± 0.21 mas [1] |
Distance | 201 ± 3
ly (61.7 ± 0.8 pc) |
Absolute magnitude (MV) | 0.66±0.028 [5] |
Details | |
Mass | 1.44 [2] M☉ |
Radius | 17 [6] R☉ |
Luminosity | 89 [2] L☉ |
Surface gravity (log g) | 2.34 [7] cgs |
Temperature | 4,403±24 [2] K |
Metallicity [Fe/H] | +0.01 [7] dex |
Rotational velocity (v sin i) | 10 [8] km/s |
Age | 4.33 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Kappa Leonis, Latinized from κ Leonis, is a double star in the constellation Leo. [9] It was called Al-minħar al-asad ( Arabic: المنخر الأسد), meaning "the Lion's nose." [10] The name is corrupted to Al Minliar al Asad in the Yale Bright Star Catalogue. [11] This star is visible to the naked eye with an apparent visual magnitude of 4.46. [2] 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. [4]
The primary component is an evolved K-type giant star with a stellar classification of K2 III. [2] It is about the same age as the Sun with an estimated 144% [2] of the Sun's mass and has expanded to 17 [6] times the Sun's girth. It is radiating 89 [2] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,400 K. [2]
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. [12] The companion is a suspected variable star. [13]