Beta Corvi

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Template:Short description

β Corvi
Template:Location mark
Location of β Corvi (circled in red)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corvus
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 2.647[2]
Characteristics
Spectral type G5 II[3]
U−B Template:Engvar +0.586[2]
B−V Template:Engvar +0.898[2]
R−I Template:Engvar +0.44[4]
Astrometry
Radial velocity (Rv)Template:Val [5] km/s
Proper motion (μ) RA: +1.11[1] mas/yr
Dec.: −56.56[1] mas/yr
Parallax (π)22.39±0.18 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)Template:Val[6]
Details
MassTemplate:Val[5] Template:Solar mass
RadiusTemplate:Val[7] Template:Solar radius
LuminosityTemplate:Val[6] Template:Solar luminosity
Surface gravity (log g)Template:Val[7] cgs
TemperatureTemplate:Val[6] K
Metallicity [Fe/H]Template:Val[6] dex
Rotational velocity (v sin i)Template:Val[5] km/s
AgeTemplate:Val[5] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[4][8]
Database references
SIMBADdata

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Beta Corvi or β Corvi, officially named Kraz (Template:IPAc-en),[9] is the second-brightest star in the southern constellation of Corvus with an apparent visual magnitude of 2.647.[2] Based on parallax measurements obtained during the Hipparcos mission, it is about Template:Convert distant from the Sun.[1]

Nomenclature

β Corvi (Latinised to Beta Corvi) is the star's Bayer designation.

In a 1951 publication, Atlas Coeli (Skalnate Pleso Atlas of the Heavens) by Czech astronomer Antonín Bečvář, it bore the name Kraz, whose origin and meaning remain unknown.[10][11][12]

In 2016, the IAU organized a Working Group on Star Names (WGSN)[13] to catalog and standardize proper names for stars. The WGSN approved the name Kraz for this star on 1 June 2018 and it is now so included in the List of IAU-approved Star Names.[9]

In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Chariot (asterism), refers to an asterism consisting of Beta, Gamma, Epsilon and Delta Corvi.[14] Consequently, Beta Corvi itself is known as Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx).[15]

Properties

Beta Corvi has about 3.3 times the Sun's mass and is roughly 300 million years old,[5] which is old enough for a star of this mass to consume the hydrogen at its core and evolve away from the main sequence. The stellar classification is G5 II,[3] with the luminosity class of 'II' indicating this is a bright giant. The effective temperature of the star's outer envelope is about 5,325 K,[6] which produces a yellow hue common to G-type stars.[16]

Currently, Beta Corvi has expanded to 15.8[7] times the Sun's size and is emitting about 175 times the luminosity of the Sun. The abundance of elements other than hydrogen or helium, what astronomers term metallicity, is 1.38 times that of the Sun.[6]Template:Efn

This is a variable star that ranges in apparent visual magnitude from a low of 2.66 to a high of 2.60.[17]

See also

Notes

Template:Notelist

References

Template:Reflist

Template:Stars of Corvus

  1. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named aaa474_2_653
  2. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named sps1966
  3. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named mnras402_2_1369
  4. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named bsc2
  5. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named jofré
  6. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named rosas-portilla
  7. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Gomes2021
  8. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named sb0
  9. ↑ a b Script error: No such module "citation/CS1".
  10. ↑ Script error: No such module "citation/CS1".
  11. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named kaler
  12. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named falkner2011
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ 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.
  15. ↑ 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.
  16. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named csiro
  17. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named csvs
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