Kappa Leonis

From Wikipedia, the free encyclopedia
Jump to: navigation, search
κ Leonis
Observation data
Epoch J2000      Equinox J2000
Constellation Leo
Right ascension 09h 24m 39.2591s[1]
Declination +26° 10′ 56.367″[1]
Apparent magnitude (V) 4.473[2]
Spectral type K2III[2]
U−B color index +1.31[3]
B−V color index +1.23[3]
Radial velocity (Rv) +27.94[4] km/s
Proper motion (μ) RA: –31.13[1] mas/yr
Dec.: –48.06[1] mas/yr
Parallax (π) 15.28 ± 0.83[1] mas
Distance 210 ± 10 ly
(65 ± 4 pc)
Surface gravity (log g) 2.34[5] cgs
Temperature 4,370[5] K
Metallicity [Fe/H] +0.01[5] dex
Rotational velocity (v sin i) 10[6] km/s
Other designations
1 Leo, HR 3731, BD+26 1939, HD 81146, SAO 80807, FK5 1244, HIP 46146.[2]

Kappa Leonis (κ Leonis, κ Leo) is a 4th-magnitude double star in the constellation Leo.[2] It was known as Minchir el-asad on Bode's large star atlas, Uranographia. This name is derived from the Arabic Minkhir al-Asad, "the Muzzle of (the constellation of) the Lion" for this star. The name is erroneously spelt as Al Minliar al Asad in the Yale Bright Star Catalogue.[7]

Kappa Leonis has apparent magnitude +4.46 and has a stellar classification of K2III. It is approximately 210 light years from Earth.


  1. ^ a b c d e Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J.; Hoeg, E.; Bastian, U.; Bernacca, P. L.; Crézé, M.; Donati, F.; Grenon, M.; Grewing, M.; Van Leeuwen, F.; Van Der Marel, H.; Mignard, F.; Murray, C. A.; Le Poole, R. S.; Schrijver, H.; Turon, C.; Arenou, F.; Froeschlé, M.; Petersen, C. S. (1997). "The HIPPARCOS Catalogue". Astronomy and Astrophysics. 323. Bibcode:1997A&A...323L..49P. 
  2. ^ a b c d "CCDM J09247+2611AB -- Double or multiple star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 2010-05-20. 
  3. ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "Ubvrijkl Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J. 
  4. ^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579free to read. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. 
  5. ^ a b c McWilliam, Andrew (1990). "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances". The Astrophysical Journal Supplement Series. 74: 1075. Bibcode:1990ApJS...74.1075M. doi:10.1086/191527. 
  6. ^ Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities: I. Main sequence single stars. II. Main sequence spectroscopic binaries and eclipsing systems". Contrib. Os. Astrofis. Asiago. 239. Bibcode:1970CoAsi.239....1B. 
  7. ^ Hoffleit, D.; Warren Jr., W. H. (1991). "VizieR Correlated Data, HR 3731". Bright Star Catalogue, 5th Revised Ed. VizieR. Retrieved 2010-05-20.