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词条 Zeta Draconis
释义

  1. Nomenclature

  2. Properties

  3. References

{{Starbox begin
| name = ζ Draconis
}}{{Starbox image
| image={{Location mark
|image=Draco constellation map.svg|alt=|float=center|width=260
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=ζ Draconis
|x=407|y=686
}}
|caption=Location of ζ Draconis (circled)
}}{{Starbox observe
| epoch = J2000
| ra = {{RA|17|08|47.19596}}
| dec = {{DEC|+65|42|52.8634}}
| appmag_v = +3.17[3]
| constell = Draco
}}{{Starbox character
| class = B6 III[4]
| b-v = –0.11[3]
| u-b = –0.43[3]
| variable =
}}{{Starbox astrometry
| radial_v = –17[7]
| prop_mo_ra = –20.43
| prop_mo_dec = +19.61
| parallax = 9.93
| p_error = 0.35
| parallax_footnote =
| absmag_v = −1.88[11]
}}{{Starbox detail
| mass = 3.5[12]
| radius = 2.3[12]
| luminosity = 148[12]
| temperature = 13,397[4]
| metal_fe = –0.95[4]
| rotational_velocity = 55[17]
| gravity = 4.24[4]
| age_gyr =
}}{{Starbox catalog
| names = 22 Draconis, BD+65 1170, FK5 639, HD 155763, HIP 83895, HR 6396, SAO 17365, WDS 17088+6543.[19]{{Starbox reference
| Simbad = zet+Dra
}}{{Starbox end}}Zeta Draconis (ζ Draconis, abbreviated Zet Dra, ζ Dra) is a binary star in the northern circumpolar constellation of Draco. With an apparent visual magnitude of +3.17,[3] it is the fifth-brightest member of this generally faint constellation. Its distance from the Sun has been measured using the parallax technique, yielding an estimate of roughly {{Convert|330|ly|pc|abbr=off|lk=on}}.

The two components are designated Zeta Draconis A (also named Aldhibah[1]) and B.

Nomenclature

ζ Draconis (Latinised to Zeta Draconis) is the system's Bayer designation. The designations of the two components as Zeta Draconis A and B derives from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[2]

Zeta Draconis shares the Arabic name Al dhi'bah ('the hyenas') with several other stars in the constellation,[24] and shares the name Al dhibain with Eta Draconis.[25] It is known as Nodus III (Third Knot, the knot being a loop in the tail of Draco).[26] In 2016, the IAU organized a Working Group on Star Names (WGSN)[3] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.[4] It approved the name Aldhibah for the component Zeta Draconis A on 5 September 2017. It also approved the name Athebyne for Eta Draconis A on the same date. Both are now so included in the List of IAU-approved Star Names.[1]

Zeta Draconis is mentioned in Hindu mythology as Tara who was a celestial goddess married to Lord Brhaspati. A divine epic was played out in the night sky when Lord Chandra, the moon, lusted after and abducted Tara, the blue pole star of Brhaspati, the planet Jupiter. By the completion of the epic Tara gives birth to Lord Budha, or Mercury.[5]

In Chinese, {{lang|zh|紫微左垣}} ({{lang|zh-Latn|Zǐ Wēi Zuǒ Yuán}}), meaning Left Wall of Purple Forbidden Enclosure, refers to an asterism consisting of Zeta Draconis, Iota Draconis, Eta Draconis, Theta Draconis, Upsilon Draconis, 73 Draconis, Gamma Cephei and 23 Cassiopeiae.[6] Consequently, Zeta Draconis itself is known as {{lang|zh|紫微左垣四}} ({{lang|zh-Latn|Zǐ Wēi Zuǒ Yuán sì}}, {{lang-en|the Fourth Star of Left Wall of Purple Forbidden Enclosure}}),[7] representing {{lang|zh|上弼}} ({{lang|zh-Latn|Shǎngbì}}), meaning The First Minister.[8] 上弼 (Shǎngbì) is westernized into Shang Pih by R.H. Allen with meaning "the Higher Minister".[9]

Properties

Zeta Draconis A is a giant star with a stellar classification of B6 III.[4] Compared to the Sun, this star is about 2.5 times larger, 3.5 times more massive, and is radiating 148 times as much luminosity.[12] This energy is being emitted from the star's outer envelope at an effective temperature of nearly 13,400 K.[4] The azimuthal rotation velocity along the equator is at least 55 km/s.[17]

The north ecliptic pole is located at right ascension 18h and declination +66.5°.[39] This is located roughly midway between Delta Draconis and Zeta Draconis.[40] The north ecliptic pole almost coincides with the south celestial pole of Venus; Zeta Draconis is also the north pole star of Jupiter.[10]

References

1. ^{{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |accessdate=16 December 2017}}
2. ^{{cite arXiv |title=On the naming convention used for multiple star systems and extrasolar planets |date=2010 |eprint=1012.0707 |class=astro-ph.SR |last1= Hessman |first1=F. V. |last2= Dhillon |first2=V. S. |last3= Winget |first3=D. E. |last4= Schreiber |first4=M. R. |last5= Horne |first5=K. |last6= Marsh |first6=T. R. |last7= Guenther |first7=E. |last8= Schwope |first8=A. |last9= Heber |first9=U. }}
3. ^{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|accessdate=22 May 2016}}
4. ^{{cite web | url=https://www.iau.org/static/science/scientific_bodies/working_groups/280/wg-starnames-triennial-report-2015-2018.pdf | page=5 | title=WG Triennial Report (2015-2018) - Star Names |accessdate=2018-07-14}}
5. ^{{cite book |url=https://books.google.com/books?id=SzLTWow0EgwC&pg=PA120 |title=Handbook of Hindu Mythology |publisher = ABC-CLIO |author =George Mason Williams |year =2003 |isbn = 1576071065 |page=91 |accessdate= 17 July 2015}}
6. ^{{zh icon}} 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}.
7. ^{{zh icon}} AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 10 日
8. ^{{zh icon}} English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name {{webarchive |url=https://web.archive.org/web/20100810114313/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/e_research_chinengstarzone_b.htm#PrupleForbiddenEnclosure |date=August 10, 2010 }}, Hong Kong Space Museum. Accessed on line November 23, 2010.
9. ^Star Name - R.H. Allen p. 210
10. ^{{Cite journal|last=Sharrah|first=Paul C.|year=1975|title=Pole Stars of Other Planets|url=https://libraries.uark.edu/aas/issues/1975v29/v29a21.pdf|journal=Arkansas Academy of Sciences Proceedings|volume=XXIX|pages=62–63|via=}}
11. ^{{citation | display-authors=1 | last1=Cenarro | first1=A. J. | last2=Peletier | first2=R. F. | last3=Sánchez–blázquez | first3=P. | last4=Selam | first4=S. O. | last5=Toloba | first5=E. | last6=Cardiel | first6=N. | last7=Falcón–barroso | first7=J. | last8=Gorgas | first8=J. | last9=Jiménez-Vicente | first9=J. | pages=664–690 | title=Medium-resolution Isaac Newton Telescope Library of Empirical Spectra – II. The Stellar Atmospheric Parameters | journal=Monthly Notices of the Royal Astronomical Society | volume=374 | issue=2 | doi=10.1111/j.1365-2966.2006.11196.x | date=2007 | bibcode=2007MNRAS.374..664C | arxiv=astro-ph/0611618 | postscript=. }}
12. ^{{citation | last1=Malagnini | first1=M. L. | last2=Morossi | first2=C. | title=Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars | journal=Astronomy and Astrophysics Supplement Series | volume=85 | issue=3 | pages=1015–1019 |date=November 1990 | bibcode=1990A&AS...85.1015M | postscript=. }}
13. ^{{citation | last1=Royer | first1=F. | display-authors=etal | title=Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i | journal=Astronomy and Astrophysics | volume=393 | pages=897–911 |date=October 2002 | doi=10.1051/0004-6361:20020943 | bibcode=2002A&A...393..897R|arxiv = astro-ph/0205255 | postscript=. }}
14. ^{{citation | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | date=1966 | bibcode=1966CoLPL...4...99J | postscript=. }}
15. ^{{citation | last=Evans | first=D. S. | date=June 20–24, 1966 | editor=Batten, Alan Henry | editor2=Heard, John Frederick | contribution=The Revision of the General Catalogue of Radial Velocities | title=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | publication-place=University of Toronto | publisher=International Astronomical Union | bibcode=1967IAUS...30...57E | postscript=. }}
16. ^{{citation | title=Zet Dra | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Zet+Dra | accessdate=2009-10-10 | postscript=. }}
17. ^{{citation | first=Richard Hinckley | last=Allen | date=1899 | page=210 | title=Star-names and their meanings | publisher=G. E. Stechert | location=New York | url=https://books.google.com/books?id=5xQuAAAAIAAJ | postscript=. }}
18. ^{{citation | last1=Rumrill | first1=H. B. |date=June 1936 | title=Star Name Pronunciation | journal=Publications of the Astronomical Society of the Pacific | volume=48 | issue=283 | pages=139–154 | doi=10.1086/124681 | bibcode=1936PASP...48..139R | postscript=. }}
19. ^{{citation | last1=Kaler | first1=Jim | publisher=University of Illinois | title=Al Dhibain ("The Posterior") | work=Stars | url=http://stars.astro.illinois.edu/sow/aldhibpost.html | accessdate=2009-10-12 | postscript=. }}
20. ^{{citation | author=Chartrand, Mark R. | author2=Wimmer, Helmut K. | date=2001 | title=Night Sky: A Guide To Field Identification | page=12 | publisher=Macmillan | isbn=1-58238-126-7 | postscript=. }}
21. ^{{citation | last1=Young | first1=Charles Augustus | date=1919 | title=The Elements of Astronomy: a Textbook | page=69 | editor=Anne Sewell Young | url=https://books.google.com/books?id=CKoRAAAAYAAJ | publisher=Ginn and company | accessdate=2009-10-12 | postscript=. }}
22. ^{{citation | display-authors=1 | author1=Huang | first1=W. | last2=Wallerstein | first2=G. | last3=Stone | first3=M. | title=A catalogue of Paschen-line profiles in standard stars | journal=Astronomy & Astrophysics | volume=547 | pages=A62 | year=2012 | bibcode=2012A&A...547A..62H | arxiv=1210.7893 | doi=10.1051/0004-6361/201219804 | postscript=. }}
[11][12][13][14][15][16][17][18][19][20][21][22]
}}{{Stars of Draco}}

9 : Draco (constellation)|Bayer objects|B-type giants|Stars with proper names|Hipparcos objects|Flamsteed objects|HR objects|Henry Draper Catalogue objects|Durchmusterung objects

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