From Wikipedia, the free encyclopedia
(Redirected from Κ Leonis)
κ Leonis
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]
Distance201 ± 3  ly
(61.7 ± 0.8  pc)
Absolute magnitude (MV)0.66±0.028 [5]
Details
Mass1.44 [2]  M
Radius17 [6]  R
Luminosity89 [2]  L
Surface gravity (log g)2.34 [7]  cgs
Temperature4,403±24 [2]  K
Metallicity [Fe/H]+0.01 [7]  dex
Rotational velocity (v sin i)10 [8] km/s
Age4.33 [2]  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 [9]
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]

References

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752. Bibcode: 2007A&A...474..653V. doi: 10.1051/0004-6361:20078357. S2CID  18759600.
  2. ^ a b c d e f g h i j k Luck, R. Earle (2015). "Abundances in the Local Region. I. G and K Giants". Astronomical Journal. 150 (3). 88. arXiv: 1507.01466. Bibcode: 2015AJ....150...88L. doi: 10.1088/0004-6256/150/3/88. S2CID  118505114.
  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. ^ a b 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: 165–186. arXiv: astro-ph/0409579. Bibcode: 2005A&A...430..165F. doi: 10.1051/0004-6361:20041272. S2CID  17804304.
  5. ^ Park, Sunkyung; et al. (2013). "Wilson-Bappu Effect: Extended to Surface Gravity". The Astronomical Journal. 146 (4): 73. arXiv: 1307.0592. Bibcode: 2013AJ....146...73P. doi: 10.1088/0004-6256/146/4/73. S2CID  119187733.
  6. ^ a b Massarotti, Alessandro; et al. (January 2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135 (1): 209–231. Bibcode: 2008AJ....135..209M. doi: 10.1088/0004-6256/135/1/209. S2CID  121883397.
  7. ^ a b 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.
  8. ^ 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: 1. Bibcode: 1970CoAsi.239....1B.
  9. ^ a b "* kap Leo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-05-20.
  10. ^ Allen, Richard Hinckley (1963) [1899]. Star Names: Their Lore and Meaning (Revised ed.). New York: Dover Publications. pp.  67–72. ISBN  0-486-21079-0.
  11. ^ Hoffleit, D.; Warren Jr., W. H. (1991). "VizieR Correlated Data, HR 3731". Bright Star Catalogue, 5th Revised Ed. VizieR. Retrieved 2010-05-20.
  12. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID  14878976.
  13. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode: 2009yCat....102025S.
From Wikipedia, the free encyclopedia
(Redirected from Κ Leonis)
κ Leonis
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]
Distance201 ± 3  ly
(61.7 ± 0.8  pc)
Absolute magnitude (MV)0.66±0.028 [5]
Details
Mass1.44 [2]  M
Radius17 [6]  R
Luminosity89 [2]  L
Surface gravity (log g)2.34 [7]  cgs
Temperature4,403±24 [2]  K
Metallicity [Fe/H]+0.01 [7]  dex
Rotational velocity (v sin i)10 [8] km/s
Age4.33 [2]  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 [9]
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]

References

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752. Bibcode: 2007A&A...474..653V. doi: 10.1051/0004-6361:20078357. S2CID  18759600.
  2. ^ a b c d e f g h i j k Luck, R. Earle (2015). "Abundances in the Local Region. I. G and K Giants". Astronomical Journal. 150 (3). 88. arXiv: 1507.01466. Bibcode: 2015AJ....150...88L. doi: 10.1088/0004-6256/150/3/88. S2CID  118505114.
  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. ^ a b 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: 165–186. arXiv: astro-ph/0409579. Bibcode: 2005A&A...430..165F. doi: 10.1051/0004-6361:20041272. S2CID  17804304.
  5. ^ Park, Sunkyung; et al. (2013). "Wilson-Bappu Effect: Extended to Surface Gravity". The Astronomical Journal. 146 (4): 73. arXiv: 1307.0592. Bibcode: 2013AJ....146...73P. doi: 10.1088/0004-6256/146/4/73. S2CID  119187733.
  6. ^ a b Massarotti, Alessandro; et al. (January 2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135 (1): 209–231. Bibcode: 2008AJ....135..209M. doi: 10.1088/0004-6256/135/1/209. S2CID  121883397.
  7. ^ a b 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.
  8. ^ 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: 1. Bibcode: 1970CoAsi.239....1B.
  9. ^ a b "* kap Leo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-05-20.
  10. ^ Allen, Richard Hinckley (1963) [1899]. Star Names: Their Lore and Meaning (Revised ed.). New York: Dover Publications. pp.  67–72. ISBN  0-486-21079-0.
  11. ^ Hoffleit, D.; Warren Jr., W. H. (1991). "VizieR Correlated Data, HR 3731". Bright Star Catalogue, 5th Revised Ed. VizieR. Retrieved 2010-05-20.
  12. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID  14878976.
  13. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode: 2009yCat....102025S.

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