Alpha Leporis
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Alpha Leporis (α Leporis, abbreviated Alpha Lep, α Lep), formally named Arneb Template:IPAc-en,[1][2] 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'[3] ('Lepus' is Latin for hare). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[4] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016[5] included a table of the first two batches of names approved by the WGSN; which included Arneb for this star.
In Chinese, Template:Lang (Template:Lang), meaning Toilet, refers to an asterism consisting of α Leporis, β Leporis, γ Leporis and δ Leporis.[6] Consequently, the Chinese name for α Leporis itself is Template:Lang (Template:Lang), "the First Star of Toilet".[7]
Properties
This is a massive star with about 14 times the mass of the Sun.[8] The interferometer-measured angular diameter of this star, after correction for limb darkening, is Template:Nowrap.[9] At an estimated distance of Template:Convert,[10] this yields a physical size of about 129 times the radius of the Sun.[11] Alpha Leporis has a stellar classification of F0 Ib,[12] 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.[13] The effective temperature of the outer envelope is about 7,300Template:NbspK,[14] which gives the star a yellowish-white hue that is typical of F-type stars.[15] It is an estimated 13 million years old.[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.[16]
Namesakes
USS Arneb (AKA-56) was a ship of the United States Navy.
References
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- ↑ 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.
- ↑ 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.
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