Kappa Leonis

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]
Characteristics
Spectral type K2III[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: –31.13[1] mas/yr
Dec.: –48.06[1] mas/yr
Parallax (π)15.28 ± 0.83[1] mas
Distance210 ± 10 ly
(65 ± 4 pc)
Details
Surface gravity (log g)2.34[5] cgs
Temperature4,370[5] K
Metallicity\begin{smallmatrix}\left[\frac{Fe}{H}\right]\ =\ +0.01\end{smallmatrix}[5]
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.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Perryman, M. A. C. et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics 323: L49–L52. Bibcode:1997A&A...323L..49P.
  2. ↑ 2.0 2.1 2.2 2.3 "CCDM J09247+2611AB -- Double or multiple star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 2010-05-20.
  3. ↑ 3.0 3.1 Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, 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. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics 430: 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272.
  5. ↑ 5.0 5.1 5.2 McWilliam, Andrew (December 1990). "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances". Astrophysical Journal Supplement Series 74: 1075–1128. Bibcode:1990ApJS...74.1075M. doi:10.1086/191527.
  6. ↑ Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities". Contributi Osservatorio Astronomico di Padova in 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.