Gamma Leonis

Algieba (circled) is the γ star in the lion's mane
Observation data
Epoch J2000      Equinox J2000
Constellation Leo
Right ascension 10
Declination +19° 50′ 29.3468″
Apparent magnitude (V) 1.98 (2.28/3.51)
Characteristics
Spectral type K0 IIIb + G7 IIICN...
U−B color index 1.00
B−V color index 1.14
Astrometry
Radial velocity (Rv) –36.24 ± 0.18 km/s
Proper motion (μ) RA: +304.30 mas/yr
Parallax (π) 25.07 ± 0.52mas
Distance 130 ± 3 ly
(39.9 ± 0.8 pc)
Absolute magnitude (MV) –0.27/+0.98
Orbit
Period (P) 510.3 yr
Semimajor axis (a) 4.24"
Eccentricity (e) 0.845
Inclination (i) 76.0°
Longitude of the node (Ω) 143.4°
Periastron epoch (T) 1671.3
Details
γ Leo A
Mass 1.23M
Radius 31.88R
Luminosity 320L
Surface gravity (log g) 2.35
Temperature 4,470K
Metallicity [Fe/H] –0.49 ± 0.12dex
γ Leo B
Radius 10 R
Luminosity 40 L
Surface gravity (log g) 2.98
Temperature 4,980K
Metallicity [Fe/H] –0.52 ± 0.11dex
Other designations
Algeiba, 41 Leo, BD +20°2467, GCTP 2423.00, HIP 50583, LTT 12764/12765, WDS 10200+1950.
γ Leo A: HD 89484, HR 4057, SAO 81298
γ Leo B: HD 89485, HR 4058, SAO 81299
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia
data

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Algieba, which is released under the Creative Commons Attribution-Share-Alike License 3.0