Beta Corvi

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β Corvi
Location of β Corvi (circled in red)
Observation data
ICRS
)
Constellation Corvus
Right ascension 12h 34m 23.23484s[1]
Declination −23° 23′ 48.3374″[1]
Apparent magnitude (V) 2.647[2]
Characteristics
Spectral type G5 II[3]
U−B color index +0.586[2]
B−V color index +0.898[2]
R−I color index +0.44[4]
Distance
146 ± 1 ly
(44.7 ± 0.4 pc)
Absolute magnitude (MV)–0.61[6]
Details
Myr
PPM 260512[4][10]
Database references
SIMBADdata

Beta Corvi or β Corvi, officially named Kraz (

apparent visual magnitude of 2.647.[2] Based on parallax measurements obtained during the Hipparcos mission, it is about 146 light-years (45 parsecs) distant from the Sun
.

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.[12][13][14] In 2016, the IAU organized a Working Group on Star Names (WGSN)[15] 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.[11]

In Chinese, 軫宿 (Zhěn Sù), meaning Chariot (asterism), refers to an asterism consisting of Beta, Gamma, Epsilon and Delta Corvi.[16] Consequently, Beta Corvi itself is known as 軫宿四 (Zhěn Sù sì, English: the Fourth Star of Chariot).[17]

Properties

Beta Corvi has about 3.7 times the

G-type stars.[18]

The measured

mas.[7] At an estimated distance of 146 light-years (45 parsecs),[1] this yields a physical size of about 16 times the radius of the Sun.[13][19] Because of the star's mass and radius, it is emitting about 164 times the luminosity of the Sun.[8] The abundance of elements other than hydrogen or helium, what astronomers term metallicity, is similar to the proportions in the Sun.[6]

This is a variable star that ranges in apparent visual magnitude from a low of 2.66 to a high of 2.60.[20]

See also

References

  1. ^
    S2CID 18759600
    .
  2. ^
    Bibcode:1966PDAUC...1....1G
    .
  3. ^
    S2CID 119096173
    .
  4. ^
    CDS ID V/50
    . Accessed on line September 9, 2008.
  5. Bibcode:1967IAUS...30...57E
    .
  6. ^
    S2CID 16258166
  7. ^
    doi:10.1051/0004-6361:20042039
  8. ^
    Bibcode:1999A&A...352..495M
  9. Bibcode:1970CoAsi.239....1B
    .
  10. ^ SV* ZI 946 -- Variable Star, database entry, SIMBAD. Accessed on line September 9, 2008.
  11. ^ a b "Naming Stars". IAU.org. Retrieved 18 June 2018.
  12. ISBN 978-1-931559-44-7
    .
  13. ^
    University of Illinois
    , retrieved 2012-12-28
  14. ISBN 978-1-4614-0136-0
  15. ^ "IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.
  16. ISBN 978-986-7332-25-7
    .
  17. ^ (in Chinese) 香港太空館 - 研究資源 - 亮星中英對照表 Archived 2011-01-29 at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.
  18. Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original
    on 2012-03-18, retrieved 2012-01-16
  19. ISBN 3-540-29692-1
    . The radius (R*) is given by:
  20. Bibcode:1981NVS...C......0K
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