Zeta Eridani

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ζ Eridani
Observation data
ICRS
)
Constellation Eridanus
Right ascension 03h 15m 50.02656s[1]
Declination −08° 49′ 11.0220″[1]
Apparent magnitude (V) 4.80[2]
Characteristics
Spectral type kA4hA9mA9V[3]
U−B color index +0.07[2]
B−V color index +0.24[2]
Distance
110 ± 1 ly
(33.6 ± 0.3 pc)
Absolute magnitude (MV)1.97[5]
Semi-amplitude
(K1)
(primary)		21.5±0.6 km/s
Details
Myr
HD 20320, HIP 15197, HR 984, SAO 130387, BD−09° 624, WDS J03158-0849A[10]
Database references
SIMBADdata

Zeta Eridani (ζ Eridani, abbreviated Zeta Eri, ζ Eri) is a

apparent visual magnitude of 4.80,[2] it is visible to the naked eye on a clear dark night. Based on parallax measurements taken during the Hipparcos mission, it is approximately 110 light-years from the Sun
.

Zeta Eridani is the primary or 'A' component of a

multiple star system designated WDS J03158-0849 (the secondary or 'B' component is 14 Eridani).[11] Zeta Eridani's two components are therefore designated WDS J03158-0849 Aa and Ab. Aa is formally named Zibal /ˈzaɪbəl/, the traditional name for the system.[12]

Nomenclature

ζ Eridani (Latinised to Zeta Eridani) is the binary star's Bayer designation. WDS J03158-0849 A is its designation in the Washington Double Star Catalog. The designations of the two components as WDS J03158-0849 Aa and Ab derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[13]

Zeta Eridani bore the traditional name of Zibal. This is an old misreading of the Arabic رئل riʼal "ostrich chicks" (with the carrier letter for the glottal stop taken for a 'b', and ر 'r' taken for ز 'z'), originally applied to a number of stars near

Keid.[14]

In 2016, the

multiple systems.[16] It approved the name Zibal for the component WDS J03158-0849 Aa on 12 September 2016 and it is now so included in the List of IAU-approved Star Names.[12]

Properties

Zeta Eridani is a single-lined

projected rotational velocity of 82 km/s.[5]

The system displays a statistically significant

AU. It has an estimated mass of about 0.26% of the Earth.[18]

References

  1. ^
    S2CID 18759600
    .
  2. ^
    Bibcode:1986EgUBV........0M
    .
  3. ^
    S2CID 119476992
    .
  4. S2CID 119231169
    .
  5. ^
    S2CID 56133360
    .
  6. doi:10.1086/191070
    .
  7. ^
    S2CID 119282523
    , 65.
  8. S2CID 118665352
    .
  9. ^
    S2CID 118539505
    .
  10. ^ "* zet Eri". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-10-10.{{cite web}}: CS1 maint: postscript (link)
  11. ^ "Washington Double Star Catalog". United States Naval Observatory. Retrieved 23 February 2018.
  12. ^ a b "Naming Stars". IAU.org. Retrieved 16 December 2017.
  13. arXiv:1012.0707 [astro-ph.SR
    ].
  14. ISBN 978-1-931559-44-7
    .
  15. ^ IAU Division C Working Group on Star Names (WGSN), International Astronomical Union, retrieved 22 May 2016.
  16. ^ "WG Triennial Report (2015-2018) - Star Names" (PDF). p. 5. Retrieved 2018-07-14.
  17. S2CID 122811461
    .
  18. S2CID 11879505
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=Zeta_Eridani&oldid=1186019776"