Alpha Leporis

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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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