Alpha Leporis: Difference between revisions

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| epoch    = J2000
| epoch    = J2000
| ra      = {{RA|05|32|43.81612}}<ref name=aaa474_2_653/>
| ra      = {{RA|05|32|43.81612}}<ref name=aaa474_2_653/>
| dec      = {{DEC|&minus;17|49|20.2414}}<ref name=aaa474_2_653/>
| dec      = {{DEC|−17|49|20.2414}}<ref name=aaa474_2_653/>
| appmag_v = 2.589<ref name=sps1966/>
| appmag_v = 2.589<ref name=sps1966/>
| constell = [[Lepus (constellation)|Lepus]]
| constell = [[Lepus (constellation)|Lepus]]
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| parallax_footnote =<ref name=aaa474_2_653/>
| parallax_footnote =<ref name=aaa474_2_653/>
| dist_footnote = <ref name=aaa474_2_653/>
| dist_footnote = <ref name=aaa474_2_653/>
| absmag_v = -5.7<ref name="giridhar2013"/>
| absmag_v = {{Val|-5.28}}<ref name=Kovtyukh2012 />
}}
}}
{{Starbox detail
{{Starbox detail
| mass    = {{val|13.9|0.8}}<ref name=mnras402_2_1369/>
| mass    = {{val|12|-|13}}<ref name=Wade2025/>
| radius  = {{Solar radius calculator|type=AD|1.77|0.68}}<ref name=lang2006/>
| radius  = 74<ref name=Wade2025/>{{snd}}{{val|105|15|21}}<ref name=Baines2025/>
| luminosity  = {{val|30,502|3111|fmt=commas}}<ref name=tycho-gaia/>
| luminosity  = 27,000<ref name=Wade2025/>
| temperature = 7,253 or 7,290<ref name=luck/>
| temperature = 7,253 or 7,290<ref name=luck/>
| metal_fe = +0.01–0.06<ref name=luck/>
| metal_fe = +0.01–0.06<ref name=luck/>
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{{Starbox end}}
{{Starbox end}}


'''Alpha Leporis''' ('''α Leporis''', abbreviated '''Alpha Lep''', '''α Lep'''), formally named '''Arneb''' {{IPAc-en|'|ɑr|n|E|b}},<ref name=Kunitzsch>{{cite book
'''Alpha Leporis''' ('''α Leporis''', abbreviated '''Alpha Lep''', '''α Lep'''), formally named '''Arneb''' {{IPAc-en|'|ɑr|n|E|b}},<ref name=Kunitzsch>{{citation
   |last1=Kunitzsch |first1=Paul
   |last1=Kunitzsch |first1=Paul
   |last2=Smart |first2=Tim
   |last2=Smart |first2=Tim
Line 63: Line 63:
   |publisher = Sky Pub |location = Cambridge, Massachusetts
   |publisher = Sky Pub |location = Cambridge, Massachusetts
   |isbn = 978-1-931559-44-7
   |isbn = 978-1-931559-44-7
}}</ref><ref name="IAU-CSN">{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | title=IAU Catalog of Star Names |accessdate=28 July 2016}}</ref> is the brightest [[star]] in the [[constellation]] of [[Lepus constellation|Lepus]].
}}</ref><ref name="IAU-CSN">{{citation | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | title=IAU Catalog of Star Names |accessdate=28 July 2016}}</ref> is the brightest [[star]] in the [[constellation]] of [[Lepus constellation|Lepus]].


== Nomenclature ==
== Nomenclature ==
''Alpha Leporis'' is the star's [[Bayer designation]]. The traditional name ''Arneb'' comes from the Arabic ''أرنب''  ''’arnab'' 'hare'<ref name=allen1899/> ('Lepus' is [[Latin]] for [[hare]]). In 2016, the [[International Astronomical Union]] organized a [[IAU Working Group on Star Names|Working Group on Star Names]] (WGSN)<ref name="WGSN">{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|accessdate=22 May 2016}}</ref> to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016<ref name="WGSN1">{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/WGSN_bulletin1.pdf | title=Bulletin of the IAU Working Group on Star Names, No. 1 |accessdate=28 July 2016}}</ref> included a table of the first two batches of names approved by the WGSN; which included ''Arneb'' for this star.
''Alpha Leporis'' is the star's [[Bayer designation]]. The traditional name ''Arneb'' comes from the Arabic ''أرنب''  ''’arnab'' 'hare'<ref name=allen1899/> ('Lepus' is [[Latin]] for [[hare]]). In 2016, the [[International Astronomical Union]] organized a [[IAU Working Group on Star Names|Working Group on Star Names]] (WGSN)<ref name="WGSN">{{citation | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|accessdate=22 May 2016}}</ref> to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016<ref name="WGSN1">{{citation | url=http://www.pas.rochester.edu/~emamajek/WGSN/WGSN_bulletin1.pdf | title=Bulletin of the IAU Working Group on Star Names, No. 1 |accessdate=28 July 2016}}</ref> included a table of the first two batches of names approved by the WGSN; which included ''Arneb'' for this star.


In [[Chinese astronomy|Chinese]], {{lang|zh|廁}} ({{lang|zh-Latn|Cè}}), meaning ''[[Three Stars (Chinese constellation)|Toilet]]'', refers to an asterism consisting of α Leporis, [[Beta Leporis|β Leporis]], [[Gamma Leporis|γ Leporis]] and [[Delta Leporis|δ Leporis]].<ref>{{in lang|zh}} ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}.</ref> Consequently, the [[Chinese star names|Chinese name]] for α Leporis itself is {{lang|zh|廁一}} ({{lang|zh-Latn|Cè yī}}), "the First Star of Toilet".<ref>{{in lang|zh}} [http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ala_alz.htm 香港太空館 - 研究資源 - 亮星中英對照表] {{webarchive|url=https://web.archive.org/web/20081025110153/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ala_alz.htm |date=2008-10-25 }}, Hong Kong Space Museum. Accessed on line November 23, 2010.</ref>
In [[Chinese astronomy|Chinese]], {{lang|zh|廁}} ({{lang|zh-Latn|Cè}}), meaning ''[[Three Stars (Chinese constellation)|Toilet]]'', refers to an asterism consisting of α Leporis, [[Beta Leporis|β Leporis]], [[Gamma Leporis|γ Leporis]] and [[Delta Leporis|δ Leporis]].<ref>{{in lang|zh}} ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}.</ref> Consequently, the [[Chinese star names|Chinese name]] for α Leporis itself is {{lang|zh|廁一}} ({{lang|zh-Latn|Cè yī}}), "the First Star of Toilet".<ref>{{in lang|zh}} [http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ala_alz.htm 香港太空館 - 研究資源 - 亮星中英對照表] {{webarchive|url=https://web.archive.org/web/20081025110153/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ala_alz.htm |date=2008-10-25 }}, Hong Kong Space Museum. Accessed on line November 23, 2010.</ref>


== Properties ==
== Properties ==
[[File:Stars1.gif|left|thumb|upright=1.1|Size comparison of the [[Sun]] and numerous stars, the largest of which is Arneb`]]
Alpha Leporis has a [[stellar classification]] of F0&nbsp;Ib,<ref name=aj121_4_2148/> with the Ib [[luminosity class]] indicating that it is a lower luminosity [[yellow supergiant]] star. Since 1943, the [[stellar spectrum|spectrum]] of this star has served as one of the stable anchor points by which other stars are classified.<ref name=baas25_1319/>
This is a massive star with about 14 times the [[solar mass|mass of the Sun]].<ref name=mnras402_2_1369/> The [[interferometer]]-measured [[angular diameter]] of this star, after correction for [[limb darkening]], is {{nowrap|1.77 ± 0.09 [[milliarcsecond|mas]]}}.<ref name=aaa431_773/> At an estimated distance of {{Convert|2218|ly|pc|abbr=off|lk=on}},<ref name=aaa474_2_653/> this yields a physical size of about 129 times the [[Solar radius|radius of the Sun]].<ref name=lang2006/> Alpha Leporis has a [[stellar classification]] of F0&nbsp;Ib,<ref name=aj121_4_2148/> with the Ib [[luminosity class]] indicating that it is a lower luminosity [[yellow supergiant]] star. Since 1943, the [[stellar spectrum|spectrum]] of this star has served as one of the stable anchor points by which other stars are classified.<ref name=baas25_1319/> The [[effective temperature]] of the outer envelope is about 7,300{{nbsp}}[[Kelvin|K]],<ref name=luck/> which gives the star a yellowish-white hue that is typical of [[F-type star]]s.<ref name=csiro/> It is an estimated 13 million years old.<ref name=mnras402_2_1369/>
 
This is a massive star with about 12 to 13 times the [[solar mass|mass of the Sun]]<ref name=Wade2025/> and 105 times the [[Sun's radius]].<ref name=Baines2025/> The [[effective temperature]] of the outer envelope is about 7,300{{nbsp}}[[Kelvin|K]],<ref name=luck/> which gives the star a yellowish-white hue that is typical of [[F-type star]]s.<ref name=csiro/> It is an estimated 13 million years old.<ref name=mnras402_2_1369/> A weak [[magnetic field]] was detected around the star.<ref name=Wade2025/>


Arneb is an older, dying star that has already passed through a [[red supergiant]] phase and is now contracting and heating up in the latter phases of [[stellar evolution]], in a [[blue loop]].<ref name="cno" />
Arneb is an older, dying star that has already passed through a [[red supergiant]] phase and is now contracting and heating up in the latter phases of [[stellar evolution]], in a [[blue loop]].<ref name="cno" />
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{{reflist|30em|refs=
{{reflist|30em|refs=


<ref name=aaa474_2_653>{{cite journal | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |arxiv = 0708.1752 | s2cid=18759600 }}</ref>
<ref name=aaa474_2_653>{{citation | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |arxiv = 0708.1752 | s2cid=18759600 }}</ref>
 
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<ref name=aj121_4_2148>{{citation | last1=Gray | first1=R. O. | last2=Napier | first2=M. G. | last3=Winkler | first3=L. I. | title=The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars | journal=The Astronomical Journal | volume=121 | issue=4 | pages=2148–2158 |date=April 2001 | doi=10.1086/319956 | bibcode=2001AJ....121.2148G | doi-access=free }}</ref>
<ref name=aj121_4_2148>{{citation | last1=Gray | first1=R. O. | last2=Napier | first2=M. G. | last3=Winkler | first3=L. I. | title=The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars | journal=The Astronomical Journal | volume=121 | issue=4 | pages=2148–2158 |date=April 2001 | doi=10.1086/319956 | bibcode=2001AJ....121.2148G | doi-access=free }}</ref>


<ref name=rgcrv>{{citation | last1=Evans | first1=D. S. | date=June 20–24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | contribution=The Revision of the General Catalogue of Radial Velocities | title=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | volume=30 | page=57 | location=University of Toronto | publisher=[[International Astronomical Union]] | bibcode=1967IAUS...30...57E }}</ref>
<ref name=rgcrv>{{citation | last1=Evans | first1=D. S. | date=June 20–24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | contribution=The Revision of the General Catalogue of Radial Velocities | title=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | volume=30 | page=57 | location=University of Toronto | publisher=[[International Astronomical Union]] | bibcode=1967IAUS...30...57E }}</ref>
<!-- <ref name=aaa393_897>{{citation | display-authors=1 | last1=Royer | first1=F. | last2=Grenier | first2=S. | last3=Baylac | first3=M.-O. | last4=Gómez | first4=A. E. | last5=Zorec | first5=J. | title=Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i | journal=Astronomy and Astrophysics | volume=393 | pages=897–911 |date=October 2002 | doi=10.1051/0004-6361:20020943 | bibcode=2002A&A...393..897R |arxiv = astro-ph/0205255 | s2cid=14070763 }}</ref> -->


<ref name=sps1966>{{citation | display-authors=1 | last1=Gutierrez-Moreno | first1=Adelina | last2=Moreno | first2=H. | last3=Stock | first3=J. | last4=Torres | first4=C. | last5=Wroblewski | first5=H. | title=A System of photometric standards | journal=Publications of the Department of Astronomy University of Chile | publisher=Publicaciones Universidad de Chile, Department de Astronomy | volume=1 | pages=1–17 | date=1966 | bibcode=1966PDAUC...1....1G }}</ref>
<ref name=sps1966>{{citation | display-authors=1 | last1=Gutierrez-Moreno | first1=Adelina | last2=Moreno | first2=H. | last3=Stock | first3=J. | last4=Torres | first4=C. | last5=Wroblewski | first5=H. | title=A System of photometric standards | journal=Publications of the Department of Astronomy University of Chile | publisher=Publicaciones Universidad de Chile, Department de Astronomy | volume=1 | pages=1–17 | date=1966 | bibcode=1966PDAUC...1....1G }}</ref>


<ref name=mnras402_2_1369>{{cite journal | display-authors=1 | last1=Lyubimkov | first1=Leonid S. | last2=Lambert | first2=David L. | last3=Rostopchin | first3=Sergey I. | last4=Rachkovskaya | first4=Tamara M. | last5=Poklad | first5=Dmitry B.
<ref name=mnras402_2_1369>{{citation | display-authors=1 | last1=Lyubimkov | first1=Leonid S. | last2=Lambert | first2=David L. | last3=Rostopchin | first3=Sergey I. | last4=Rachkovskaya | first4=Tamara M. | last5=Poklad | first5=Dmitry B.
  | title=Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=402 | issue=2 | pages=1369–1379 |date=February 2010 | doi=10.1111/j.1365-2966.2009.15979.x | doi-access=free | bibcode=2010MNRAS.402.1369L |arxiv = 0911.1335 | s2cid=119096173 }}</ref>
  | title=Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=402 | issue=2 | pages=1369–1379 |date=February 2010 | doi=10.1111/j.1365-2966.2009.15979.x | doi-access=free | bibcode=2010MNRAS.402.1369L |arxiv = 0911.1335 | s2cid=119096173 }}</ref>


<ref name=tycho-gaia>
<ref name=Kovtyukh2012>{{Citation |last=Kovtyukh |first=V. V. |last2=Gorlova |first2=N. I. |last3=Belik |first3=S. I. |date=2012-07-11 |title=Accurate luminosities from the oxygen λ7771-4 Å triplet and the fundamental parameters of F-G supergiants |journal=Monthly Notices of the Royal Astronomical Society |language=en |volume=423 |issue=4 |pages=3268–3273 |doi=10.1111/j.1365-2966.2012.21117.x|arxiv=1204.4115 }}</ref>
{{citation |last1=McDonald |first1=I. |last2=Zijlstra |first2=A. A. |last3=Watson |first3=R. A. |date=2017-10-01 |title=Fundamental parameters and infrared excesses of Tycho-Gaia stars  |journal=Monthly Notices of the Royal Astronomical Society |volume=471 |issue=1 |pages=770–791 |doi=10.1093/mnras/stx1433 |doi-access=free |issn=0035-8711|arxiv=1706.02208 |bibcode=2017MNRAS.471..770M }} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/MNRAS/471/770&RAJ2000=083.182566 Arneb's database entry] at [[VizieR]].</ref>
 
<ref name=aaa431_773>{{citation | last1=Richichi | first1=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | pages=773–777 |date=February 2005 | issue=2 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R | doi-access=free }}</ref>


<ref name=cno>{{Citation |last1=Smiljanic |first1=R. |last2=Barbuy |first2=B. |last3=De Medeiros |first3=J. R. |last4=Maeder |first4=A. |date=April 2006 |title=CNO in evolved intermediate mass stars |arxiv=astro-ph/0511329 |bibcode=2006A&A...449..655S |journal=Astronomy & Astrophysics |volume=449 |issue=2 |pages=655–671 |doi=10.1051/0004-6361:20054377 |issn=0004-6361}}</ref>
<ref name=cno>{{Citation |last1=Smiljanic |first1=R. |last2=Barbuy |first2=B. |last3=De Medeiros |first3=J. R. |last4=Maeder |first4=A. |date=April 2006 |title=CNO in evolved intermediate mass stars |arxiv=astro-ph/0511329 |bibcode=2006A&A...449..655S |journal=Astronomy & Astrophysics |volume=449 |issue=2 |pages=655–671 |doi=10.1051/0004-6361:20054377 |issn=0004-6361}}</ref>
<ref name=lang2006>{{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3rd | publisher=[[Birkhäuser]] | date=2006 | isbn=3-540-29692-1 | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R<sub>*</sub>) is given by:
:<math>\begin{align} 2\cdot R_*
& = \frac{(10^{-3}\cdot 680\cdot 1.77)\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
& \approx 259\cdot R_{\bigodot}
\end{align}</math></ref>


<ref name=allen1899>{{citation | first1=Richard Hinckley | last1=Allen | date=1899 | url=https://books.google.com/books?id=5xQuAAAAIAAJ&pg=PA268 | page=268 | title=Star-names and Their Meanings | publisher=G. E. Stechert }}</ref>
<ref name=allen1899>{{citation | first1=Richard Hinckley | last1=Allen | date=1899 | url=https://books.google.com/books?id=5xQuAAAAIAAJ&pg=PA268 | page=268 | title=Star-names and Their Meanings | publisher=G. E. Stechert }}</ref>
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<ref name=baas25_1319>{{citation | last1=Garrison | first1=R. F. | title=Anchor Points for the MK System of Spectral Classification | journal=Bulletin of the American Astronomical Society | volume=25 | page=1319 | date=December 1993 | bibcode=1993AAS...183.1710G | url=http://www.astro.utoronto.ca/~garrison/mkstds.html | accessdate=2012-02-04 | archive-date=June 25, 2019 | archive-url=https://web.archive.org/web/20190625094716/http://www.astro.utoronto.ca/~garrison/mkstds.html | url-status=dead }}</ref>
<ref name=baas25_1319>{{citation | last1=Garrison | first1=R. F. | title=Anchor Points for the MK System of Spectral Classification | journal=Bulletin of the American Astronomical Society | volume=25 | page=1319 | date=December 1993 | bibcode=1993AAS...183.1710G | url=http://www.astro.utoronto.ca/~garrison/mkstds.html | accessdate=2012-02-04 | archive-date=June 25, 2019 | archive-url=https://web.archive.org/web/20190625094716/http://www.astro.utoronto.ca/~garrison/mkstds.html | url-status=dead }}</ref>


<ref name="giridhar2013">{{Cite journal |last1=Giridhar |first1=S. |last2=Goswami |first2=A. |last3=Kunder |first3=A. |last4=Muneer |first4=S. |last5=Selvakumar |first5=G. |date=2013-08-01 |title=Identification of metal-poor stars using the artificial neural network |url=https://ui.adsabs.harvard.edu/abs/2013A&A...556A.121G |journal=Astronomy and Astrophysics |volume=556 |pages=A121 |doi=10.1051/0004-6361/201219918 |arxiv=1307.6308 |bibcode=2013A&A...556A.121G |issn=0004-6361}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A%2BA/556/A121&recno=31 Alpha Leporis' database entry] at VizieR.</ref>  
<ref name=Baines2025>{{Citation |last1=Baines |first1=Ellyn K. |last2=Clark |first2=James H. |last3=Kingsley |first3=Bradley I. |last4=Schmitt |first4=Henrique R. |last5=Stone |first5=Jordan M. |date=2025-05-07 |title=Vintage NPOI: New and Updated Angular Diameters for 145 Stars |journal=The Astronomical Journal |language=en |volume=169 |issue=6 |pages=293 |doi=10.3847/1538-3881/adc930 |doi-access=free |bibcode=2025AJ....169..293B |arxiv=2506.02912 |issn=1538-3881}}</ref>
 
<ref name=Wade2025>{{citation|arxiv=2507.00282 |last1=Wade |first1=Gregg |last2=Oksala |first2=Mary |last3=Neiner |first3=Coralie |last4=Boucher |first4=Etienne |last5=Barron |first5=James |title=Magnetic field monitoring of four massive A-F supergiants |date=2025 }}</ref>


<ref name="thomas2018">{{Cite journal |last=Ayres |first=Thomas R. |date=2018-02-20 |title=Cracking the Conundrum of F-Supergiant Coronae |journal=The Astrophysical Journal |volume=854 |issue=2 |pages=95 |doi=10.3847/1538-4357/aaa6d7 |doi-access=free |arxiv=1802.02552 |bibcode=2018ApJ...854...95A |issn=0004-637X}}</ref>
<ref name="thomas2018">{{Citation |last=Ayres |first=Thomas R. |date=2018-02-20 |title=Cracking the Conundrum of F-Supergiant Coronae |journal=The Astrophysical Journal |volume=854 |issue=2 |pages=95 |doi=10.3847/1538-4357/aaa6d7 |doi-access=free |arxiv=1802.02552 |bibcode=2018ApJ...854...95A |issn=0004-637X}}</ref>


<ref name=luck>{{cite journal | bibcode= 2014AJ....147..137L| title= Parameters and Abundances in Luminous Stars| journal= The Astronomical Journal| volume= 147| issue= 6| pages= 137| last1= Luck| first1= R. Earle| year= 2014| doi= 10.1088/0004-6256/147/6/137| doi-access= free}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/AJ/147/137&Name=NAME%20ARNEB Alpha Leporis' database entry] at [[VizieR]].</ref>
<ref name=luck>{{citation | bibcode= 2014AJ....147..137L| title= Parameters and Abundances in Luminous Stars| journal= The Astronomical Journal| volume= 147| issue= 6| pages= 137| last1= Luck| first1= R. Earle| year= 2014| doi= 10.1088/0004-6256/147/6/137| doi-access= free}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/AJ/147/137&Name=NAME%20ARNEB Alpha Leporis' database entry] at [[VizieR]].</ref>


<ref name=csiro>{{citation | title=The Colour of Stars | date=December 21, 2004 | work=Australia Telescope, Outreach and Education | publisher=Commonwealth Scientific and Industrial Research Organisation | url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | accessdate=2012-01-16 | archive-date=2013-12-03 | archive-url=https://web.archive.org/web/20131203222826/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | url-status=dead }}</ref>
<ref name=csiro>{{citation | title=The Colour of Stars | date=December 21, 2004 | work=Australia Telescope, Outreach and Education | publisher=Commonwealth Scientific and Industrial Research Organisation | url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | accessdate=2012-01-16 | archive-date=2013-12-03 | archive-url=https://web.archive.org/web/20131203222826/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | url-status=dead }}</ref>
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[[Category:Durchmusterung objects]]
[[Category:Durchmusterung objects]]
[[Category:Suspected variables]]
[[Category:Suspected variables]]
[[Category:Population I stars]]
[[Category:Lucidae]]

Latest revision as of 03:55, 23 September 2025

Template:Short description Template:Use mdy dates

α Leporis
Template:Location mark
Location of α Leporis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Lepus
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 2.589[2]
Characteristics
Evolutionary stage Blue loop (yellow supergiant)[3]
Spectral type F0 Ib[4]
U−B Template:Engvar +0.386[2]
B−V Template:Engvar +0.2[5]
Astrometry
Radial velocity (Rv)+23.9[6] km/s
Proper motion (μ) RA: +3.56[1] mas/yr
Dec.: +1.18[1] mas/yr
Parallax (π)1.47±0.14 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)[1]
Absolute magnitude (MV)Script error: No such module "val".[7]
Details
MassScript error: No such module "val".[8] Template:Solar mass
Radius74[8]Template:SndScript error: No such module "val".[9] Template:Solar radius
Luminosity27,000[8] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[10] cgs
Temperature7,253 or 7,290[11] K
Metallicity [Fe/H]+0.01–0.06[11] dex
Rotational velocity (v sin i)13–21[5] km/s
Age13[10] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Arneb, 11 Leporis, BD−17°1166, FK5 207, HD 36673, HIP 25985, HR 1865, SAO 150547
Database references
SIMBADdata

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Alpha Leporis (α Leporis, abbreviated Alpha Lep, α Lep), formally named Arneb Template:IPAc-en,[12][13] is the brightest star in the constellation of Lepus.

Nomenclature

Alpha Leporis is the star's Bayer designation. The traditional name Arneb comes from the Arabic أرنب ’arnab 'hare'[14] ('Lepus' is Latin for hare). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[15] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016[16] included a table of the first two batches of names approved by the WGSN; which included Arneb for this star.

In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Toilet, refers to an asterism consisting of α Leporis, β Leporis, γ Leporis and δ Leporis.[17] Consequently, the Chinese name for α Leporis itself is Script error: No such module "Lang". (Script error: No such module "Lang".), "the First Star of Toilet".[18]

Properties

Alpha Leporis has a stellar classification of F0 Ib,[4] with the Ib luminosity class indicating that it is a lower luminosity yellow supergiant star. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.[19]

This is a massive star with about 12 to 13 times the mass of the Sun[8] and 105 times the Sun's radius.[9] The effective temperature of the outer envelope is about 7,300Script error: No such module "String".K,[11] which gives the star a yellowish-white hue that is typical of F-type stars.[20] It is an estimated 13 million years old.[10] A weak magnetic field was detected around the star.[8]

Arneb is an older, dying star that has already passed through a red supergiant phase and is now contracting and heating up in the latter phases of stellar evolution, in a blue loop.[3]

Namesakes

USS Arneb (AKA-56) was a ship of the United States Navy.

References

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  1. ↑ a b c d e f Script error: No such module "citation/CS1".
  2. ↑ a b Script error: No such module "citation/CS1".
  3. ↑ a b Script error: No such module "citation/CS1".
  4. ↑ a b Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ a b c d e Script error: No such module "citation/CS1".
  9. ↑ a b Script error: No such module "citation/CS1".
  10. ↑ a b c Script error: No such module "citation/CS1".
  11. ↑ a b c Script error: No such module "citation/CS1". Alpha Leporis' database entry at VizieR.
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ Script error: No such module "citation/CS1".
  17. ↑ Template:In lang 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, Template:ISBN.
  18. ↑ Template:In lang 香港太空館 - 研究資源 - 亮星中英對照表 Template:Webarchive, Hong Kong Space Museum. Accessed on line November 23, 2010.
  19. ↑ Script error: No such module "citation/CS1".
  20. ↑ Script error: No such module "citation/CS1".

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Template:Stars of Lepus

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