Template:Short description Template:Use mdy dates Template:Starbox begin Template:Starbox image Template:Starbox observe Template:Starbox character Template:Starbox astrometry Template:Starbox detail Template:Starbox catalog Template:Starbox reference Template:Starbox end
Alpha Leporis (α Leporis, abbreviated Alpha Lep, α Lep), formally named Arneb Template:IPAc-en,<ref name=Kunitzsch>Template:Cite book</ref><ref name="IAU-CSN">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> is the brightest star in the constellation of Lepus.
NomenclatureEdit
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 Working Group on Star Names (WGSN)<ref name="WGSN">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016<ref name="WGSN1">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> included a table of the first two batches of names approved by the WGSN; which included Arneb for this star.
In Chinese, {{#invoke:Lang|lang}} ({{#invoke:Lang|lang}}), meaning Toilet, refers to an asterism consisting of α Leporis, β Leporis, γ Leporis and δ Leporis.<ref>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.</ref> Consequently, the Chinese name for α Leporis itself is {{#invoke:Lang|lang}} ({{#invoke:Lang|lang}}), "the First Star of Toilet".<ref>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.</ref>
PropertiesEdit
This is a massive star with about 14 times the mass of the Sun.<ref name=mnras402_2_1369/> The interferometer-measured angular diameter of this star, after correction for limb darkening, is Template:Nowrap.<ref name=aaa431_773/> At an estimated distance of Template:Convert,<ref name=aaa474_2_653/> this yields a physical size of about 129 times the radius of the Sun.<ref name=lang2006/> Alpha Leporis has a stellar classification of F0 Ib,<ref name=aj121_4_2148/> 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.<ref name=baas25_1319/> The effective temperature of the outer envelope is about 7,300Template:NbspK,<ref name=luck/> which gives the star a yellowish-white hue that is typical of F-type stars.<ref name=csiro/> It is an estimated 13 million years old.<ref name=mnras402_2_1369/>
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" />
NamesakesEdit
USS Arneb (AKA-56) was a ship of the United States Navy.
ReferencesEdit
Template:Reflist{0.0046491\ \text{AU}/R_{\bigodot}} \\
& \approx 259\cdot R_{\bigodot}
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<ref name=allen1899>Template:Citation</ref>
<ref name=baas25_1319>Template:Citation</ref>
<ref name="giridhar2013">Template:Cite journal Alpha Leporis' database entry at VizieR.</ref>
<ref name="thomas2018">Template:Cite journal</ref>
<ref name=luck>Template:Cite journal Alpha Leporis' database entry at VizieR.</ref>
<ref name=csiro>Template:Citation</ref>
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