Kappa Capricorni: Difference between revisions
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{{Starbox begin |
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{{unreferenced|date=December 2009}} |
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| name = Lambda Capricorni |
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{{Starbox short | |
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| name=κ Capricorni |
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| epoch=[[J2000.0]] |
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| constell=[[Capricornus]] |
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| ra=21<sup>h</sup>42<sup>m</sup>39.5<sup>s</sup> |
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| dec=−18°51′59″ |
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| spectral=G8III |
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| appmag_v=+4.72 |
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| dist_ly=291 ± 20 |
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| dist_pc=89 ± 6 |
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| names=43 Capricorni, [[Harvard Revised catalogue|HR]] 8288, [[Henry Draper Catalogue|HD]] 206453, [[Bonner Durchmusterung|BD]]−19°6152, [[Hipparcos catalogue|HIP]] 107188, [[Smithsonian Astrophysical Observatory catalogue|SAO]] 164593, GC 30382 |
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}} |
}} |
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{{Starbox observe |
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'''Kappa Capricorni''' (κ Cap, κ Capricorni) is a [[star]] in the [[constellation]] [[Capricornus]]. κ Capricorni is a yellow [[stellar classification|G-type]] [[giant star|giant]] with an [[apparent magnitude]] of +4.72 and is approximately 291 [[light years]] from [[Earth]]. |
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| epoch = [[J2000.0]] |
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| equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]]) |
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| constell = [[Capricornus]] |
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| ra = {{RA|21|42|39.50710}}<ref name=vanLeeuwen2007/> |
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| dec = {{DEC|−18|51|58.7669}}<ref name=vanLeeuwen2007/> |
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| appmag_v = +4.73<ref name=Johnson1966/> |
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}} |
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{{Starbox character |
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| class = G8 III<ref name=houk1988/> |
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| b-v = +0.88<ref name=Johnson1966/> |
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| u-b = +0.51<ref name=Johnson1966/> |
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| r-i = |
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| variable = |
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}} |
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{{Starbox astrometry |
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| radial_v = {{Val|−2.87|0.18}}<ref name=Massarotti2008/> |
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| prop_mo_ra = +145.85<ref name=vanLeeuwen2007/> |
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| prop_mo_dec = −9.50<ref name=vanLeeuwen2007/> |
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| parallax = 11.09 |
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| p_error = 0.28 |
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| parallax_footnote = <ref name=vanLeeuwen2007/> |
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| absmag_v = −0.023<ref name=Soubiran2008/> |
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}} |
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{{Starbox detail |
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| source = <ref name=Reffert2015/> |
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| mass = {{Val|2.43|0.21}} |
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| radius = {{Val|13.28|0.47}} |
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| luminosity = {{Val|106.8|5.9}} |
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| temperature = {{Val|5096|57|fmt=commas}} |
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| gravity = {{Val|2.59|0.06}} |
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| metal_fe = {{Val|−0.39|0.10}} |
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| rotational_velocity = 0.0<ref name=Massarotti2008/> |
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| age_gyr = 1.19<ref name=luck2015/> |
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}} |
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{{Starbox catalog |
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| names = [[Bayer designation|κ Cap]], [[Flamsteed designation|43 Cap]], [[Durchmusterung|BD]]−19° 6152, [[Henry Draper Catalogue|HD]] 206453, [[Hipparcos Catalogue|HIP]] 107188, [[Bright Star Catalogue|HR]] 8288, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 164593<ref name=SIMBAD/> |
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}} |
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{{Starbox end}} |
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'''Kappa Capricorni''' (κ Cap, κ Capricorni) is a solitary<ref name=Eggleton2008/> [[star]] in the [[constellation]] [[Capricornus]]. It is visible to the naked eye with an [[apparent visual magnitude]] of +4.73.<ref name=Johnson1966/> Based upon an annual [[parallax]] shift of 11.09 [[milliarcsecond|mas]] as seen from the Earth,<ref name=vanLeeuwen2007/> the star is located about 294 [[light year]]s from the [[Sun]]. |
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This is a yellow-hued, [[stellar evolution|evolved]], [[G-type star|G-type]] [[giant star]] with a [[stellar classification]] of G8 III.<ref name=houk1988/> There is a 91% probability that it is currently on the [[horizontal branch]], rather than the [[red giant branch]].<ref name=Reffert2015/> As such, it is a [[red clump]]<ref name=Alves2000/> giant with an estimated 2.43 times the [[mass of the Sun]] and has expanded to 13.28 times the [[radius of the Sun]].<ref name=Reffert2015/> The star is about 1.2<ref name=luck2015/> billion years old and has a [[projected rotational velocity]] that is too small to be measured.<ref name=Massarotti2008/> It radiates 107 times the [[solar luminosity]] from its [[photosphere]] at an [[effective temperature]] of 5,096 K.<ref name=Reffert2015/> |
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{{Stars of Capricornus}} |
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==References== |
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{{reflist|refs= |
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<ref name=vanLeeuwen2007>{{citation |
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| title=Validation of the new Hipparcos reduction |
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| last1=van Leeuwen | first1=F. |
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| journal=Astronomy and Astrophysics |
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| volume=474 | issue=2 | pages=653–664 | date=2007 |
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| arxiv=0708.1752 | bibcode=2007A&A...474..653V |
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| doi=10.1051/0004-6361:20078357 | postscript=. }}</ref> |
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<ref name=Alves2000>{{citation |
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| last1=Alves | first1=David R. |
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| title=K-Band Calibration of the Red Clump Luminosity |
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| journal=The Astrophysical Journal |
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| volume=539 | issue=2 | pages=732–741 | date=August 2000 |
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| doi=10.1086/309278 | bibcode=2000ApJ...539..732A |
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| arxiv=astro-ph/0003329 | postscript=. }}</ref> |
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<ref name=Eggleton2008>{{citation |
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| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. |
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| title=A catalogue of multiplicity among bright stellar systems |
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| journal=Monthly Notices of the Royal Astronomical Society |
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| volume=389 | issue=2 | pages=869–879 | date=September 2008 |
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| doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E |
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| arxiv=0806.2878 | postscript=. }}</ref> |
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<ref name=Soubiran2008>{{citation |
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| last1=Soubiran | first1=C. | last2=Bienaymé | first2=O. |
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| last3=Mishenina | first3=T. V. | last4=Kovtyukh | first4=V. V. |
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| title=Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants |
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| display-authors=1 | journal=Astronomy and Astrophysics |
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| date=2008 | volume=480 | issue=1 | pages=91–101 |
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| bibcode=2008A&A...480...91S | doi=10.1051/0004-6361:20078788 |
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| arxiv=0712.1370 | postscript=. }}</ref> |
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<ref name=luck2015>{{citation |
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| title=Abundances in the Local Region. I. G and K Giants |
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| journal=The Astronomical Journal |
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| last1=Luck | first1=R. Earle | postscript=. |
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| volume=150 | issue=3 | pages=88 | year=2015 |
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| bibcode=2015AJ....150...88L | doi=10.1088/0004-6256/150/3/88 }}</ref> |
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<ref name=Massarotti2008>{{citation | display-authors=1 |
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| last1=Massarotti | first1=Alessandro | last2=Latham | first2=David W. |
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| last3=Stefanik | first3=Robert P. | last4=Fogel | first4=Jeffrey |
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| title=Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity |
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| journal=The Astronomical Journal | postscript=. |
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| volume=135 | issue=1 | pages=209–231 | date=January 2008 |
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| doi=10.1088/0004-6256/135/1/209 | bibcode=2008AJ....135..209M }}</ref> |
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<ref name=Reffert2015>{{citation |
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| title=Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity |
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| display-authors=1 | last1=Reffert | first1=Sabine |
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| last2=Bergmann | first2=Christoph | last3=Quirrenbach | first3=Andreas |
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| last4=Trifonov | first4=Trifon | last5=Künstler | first5=Andreas |
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| journal=Astronomy and Astrophysics |
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| volume=574A | issue=2 | pages=116–129 | date=2015 |
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| bibcode=2015A&A...574A.116R | doi=10.1051/0004-6361/201322360 |
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| arxiv=1412.4634 | postscript=. }} Values are based on 91% probability it is on the horizontal branch.</ref> |
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<ref name=houk1988>{{citation |
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| title=Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars |
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| last1=Houk | first1=N. | last2=Smith-Moore | first2=M. |
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| volume=4 | year=1988 | postscript=. |
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| bibcode=1988MSS...C04....0H }}</ref> |
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<ref name=Johnson1966>{{citation |
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| last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. |
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| last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. |
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| title=UBVRIJKL photometry of the bright stars | display-authors=1 |
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| journal=Communications of the Lunar and Planetary Laboratory |
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| volume=4 | issue=99 | year=1966 |
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| bibcode=1966CoLPL...4...99J | postscript=. }}</ref> |
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<ref name=SIMBAD>{{citation |
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| title=kap Cap -- Star |
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| work=SIMBAD Astronomical Database |
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| publisher=Centre de Données astronomiques de Strasbourg |
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| url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=kap+Cap |
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| accessdate=2017-05-13 | postscript=. }}</ref> |
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}} |
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{{Template:Stars of Capricornus|state=collapsed}} |
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[[Category:G-type giants]] |
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[[Category:Bayer objects|Capricorni, Kappa]] |
[[Category:Bayer objects|Capricorni, Kappa]] |
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[[Category:Capricornus (constellation)]] |
[[Category:Capricornus (constellation)]] |
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[[Category: |
[[Category:Durchmusterung objects]] |
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[[Category:Flamsteed objects|Capricorni, 43]] |
[[Category:Flamsteed objects|Capricorni, 43]] |
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[[Category:Hipparcos objects|107188]] |
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[[Category:Henry Draper Catalogue objects|206453]] |
[[Category:Henry Draper Catalogue objects|206453]] |
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[[Category:Hipparcos objects|107188]] |
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[[Category:HR objects|8288]] |
[[Category:HR objects|8288]] |
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[[Category:Durchmusterung objects]] |
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{{Giant-star-stub}} |
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Revision as of 17:31, 15 May 2017
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h 42m 39.50710s[1] |
| Declination | −18° 51′ 58.7669″[1] |
| Apparent magnitude (V) | +4.73[2] |
| Characteristics | |
| Spectral type | G8 III[3] |
| U−B color index | +0.51[2] |
| B−V color index | +0.88[2] |
| Astrometry | |
| Radial velocity (Rv) | −2.87±0.18[4] km/s |
| Proper motion (μ) | RA: +145.85[1] mas/yr Dec.: −9.50[1] mas/yr |
| Parallax (π) | 11.09 ± 0.28 mas[1] |
| Distance | 294 ± 7 ly (90 ± 2 pc) |
| Absolute magnitude (MV) | −0.023[5] |
| Details[6] | |
| Mass | 2.43±0.21 M☉ |
| Radius | 13.28±0.47 R☉ |
| Luminosity | 106.8±5.9 L☉ |
| Surface gravity (log g) | 2.59±0.06 cgs |
| Temperature | 5,096±57 K |
| Metallicity [Fe/H] | −0.39±0.10 dex |
| Rotational velocity (v sin i) | 0.0[4] km/s |
| Age | 1.19[7] Gyr |
| Other designations | |
Kappa Capricorni (κ Cap, κ Capricorni) is a solitary[9] star in the constellation Capricornus. It is visible to the naked eye with an apparent visual magnitude of +4.73.[2] Based upon an annual parallax shift of 11.09 mas as seen from the Earth,[1] the star is located about 294 light years from the Sun.
This is a yellow-hued, evolved, G-type giant star with a stellar classification of G8 III.[3] There is a 91% probability that it is currently on the horizontal branch, rather than the red giant branch.[6] As such, it is a red clump[10] giant with an estimated 2.43 times the mass of the Sun and has expanded to 13.28 times the radius of the Sun.[6] The star is about 1.2[7] billion years old and has a projected rotational velocity that is too small to be measured.[4] It radiates 107 times the solar luminosity from its photosphere at an effective temperature of 5,096 K.[6]
References
- ^ a b c d e f 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.
- ^ a b c d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
- ^ a b Houk, N.; Smith-Moore, M. (1988), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, vol. 4, Bibcode:1988MSS...C04....0H.
- ^ a b c 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.
- ^ Soubiran, C.; et al. (2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics, 480 (1): 91–101, arXiv:0712.1370, Bibcode:2008A&A...480...91S, doi:10.1051/0004-6361:20078788.
- ^ a b c d Reffert, Sabine; et al. (2015), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity", Astronomy and Astrophysics, 574A (2): 116–129, arXiv:1412.4634, Bibcode:2015A&A...574A.116R, doi:10.1051/0004-6361/201322360. Values are based on 91% probability it is on the horizontal branch.
- ^ a b Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 88, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88.
- ^ "kap Cap -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2017-05-13.
- ^ 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.
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal, 539 (2): 732–741, arXiv:astro-ph/0003329, Bibcode:2000ApJ...539..732A, doi:10.1086/309278.
