Lambda Aurigae

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Template:Short description

λ Aurigae
Template:Location mark
Location of λ Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 4.71[2]
Characteristics
Spectral type G1 V[3] or G1.5 IV-V Fe-1[4]
U−B Template:Engvar +0.13[2]
B−V Template:Engvar +0.62[2]
R−I Template:Engvar 0.32
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: +520.569 mas/yr[1]
Dec.: −664.488 mas/yr[1]
Parallax (π)79.6021±0.1005 mas[5]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)4.20[6]
Details
MassScript error: No such module "val".[7] Template:Solar mass
RadiusScript error: No such module "val".[3] Template:Solar radius
LuminosityScript error: No such module "val".[3] Template:Solar luminosity
Surface gravity (log g)4.02[8] cgs
TemperatureScript error: No such module "val".[9] K
Metallicity [Fe/H]+0.12[10] dex
Rotational velocity (v sin i)2[11] km/s
Age4,[10] 5.0–7.9[12] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[13]
Database references
SIMBADdata
ARICNSdata

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Lambda Aurigae is a Sun-like[10] star in the northern constellation of Auriga.[14] Its name is a Bayer designation that is Latinized from λ Aurigae, and abbreviated Lambda Aur or λ Aur. This star is visible to the naked eye with an apparent visual magnitude of 4.71.[2] Based upon parallax measurements, it is Script error: No such module "convert". distant from the Earth.[1] The star is drifting further away with a high radial velocity of +66.5 km/s,[5] having come to within Script error: No such module "convert". some 117,300 years ago.[15] It has a high proper motion, traversing the celestial sphere at the rate of Script error: No such module "val". per year.[16]

Properties

This is a G-type main sequence star with a stellar classification of G1 V.[3] It is sometimes listed with a class of G1.5 IV-V Fe-1,[4] which indicates the spectrum is showing some features of a more evolved subgiant star along with a noticeable underabundance of iron. In terms of composition it is similar to the Sun, while the mass and radius are slightly larger.[7] It is 73% more luminous than the Sun[3] and radiates this energy from its outer atmosphere at an effective temperature of Script error: No such module "val"..[9] At this heat, the star glows with the yellow hue of a G-type star.[17] It has a low level of magnetic activity and is a candidate Maunder minimum analog.[18]

Lambda Aurigae has been examined for the presence of excess infrared emission that may indicate the presence of a circumstellar disk of dust, but no significant surplus has been observed.[10] It is a possible member of the Epsilon Indi Moving Group of stars that share a common motion through space. The space velocity components of this star are [U, V, W] = [+76, –39, –6] km/s.[19]

Name

This star may have been called by the name Al Hurr, meaning the fawn in Arabic.[20] Lambda Aurigae, along with μ Aur and σ Aur, were Kazwini's Al Ḣibāʽ (ألحباع), the Tent.[20] According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Ḣibāʽ were the title for three stars : λ Aur as Al Ḣibāʽ I, μ Aur as Al Ḣibāʽ II and σ Aur as Al Ḣibāʽ III.[21]

In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Pool of Harmony, refers to an asterism consisting of λ Aurigae, ρ Aurigae and HD 36041.[22] Consequently, the Chinese name for λ Aurigae itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[23]

Observation

From Earth, Lambda Aurigae has an apparent magnitude of 4.71. The closest large neighboring star to Lambda Aurigae is Capella, located Script error: No such module "convert". away.[24] Hypothetically viewed from Lambda Aurigae, Capella's quadruple star system would have an apparent magnitude of approximately -5.48,[25] about 40 times brighter than Sirius can be seen at maximum brightness from Earth.[26]

References

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  1. ↑ a b c d Template:Cite Gaia DR3
  2. ↑ a b c d Script error: No such module "citation/CS1".
  3. ↑ a b c d e Script error: No such module "citation/CS1".. See Table 10.
  4. ↑ a b Script error: No such module "citation/CS1".
  5. ↑ a b c Template:Cite Gaia DR2
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ a b Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "citation/CS1".
  9. ↑ a b Script error: No such module "citation/CS1".
  10. ↑ a b c d Script error: No such module "citation/CS1".
  11. ↑ Script error: No such module "citation/CS1".
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Template:Cite simbad
  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. ↑ Script error: No such module "citation/CS1".
  18. ↑ Script error: No such module "citation/CS1".
  19. ↑ Script error: No such module "citation/CS1".
  20. ↑ a b Script error: No such module "citation/CS1".
  21. ↑ Script error: No such module "citation/CS1".
  22. ↑ 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.
  23. ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 13 日 Template:Webarchive
  24. ↑ Script error: No such module "citation/CS1".
  25. ↑ Script error: No such module "citation/CS1".
  26. ↑ Script error: No such module "citation/CS1".

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External links

Template:Stars of Auriga

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