fbpx
Wikipedia

Zeta Draconis

October 21, 2023

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,[2] 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 330 light-years (100 parsecs).[1]

ζ Draconis
Location of ζ Draconis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Draco
Right ascension 17h 08m 47.19596s[1]
Declination +65° 42′ 52.8634″[1]
Apparent magnitude (V) +3.17[2]
Characteristics
Spectral type B6 III[3]
U−B color index –0.43[2]
B−V color index –0.11[2]
Astrometry
Radial velocity (Rv)–17[4] km/s
Proper motion (μ) RA: –20.43[1] mas/yr
Dec.: +19.61[1] mas/yr
Parallax (π)9.93 ± 0.35 mas[1]
Distance330 ± 10 ly
(101 ± 4 pc)
Absolute magnitude (MV)−1.88[5]
Details
Mass3.5[6] M☉
Radius2.3[6] R☉
Luminosity148[6] L☉
Surface gravity (log g)4.24[3] cgs
Temperature13,397[3] K
Metallicity [Fe/H]–0.95[3] dex
Rotational velocity (v sin i)55[7] km/s
Other designations
22 Draconis, BD+65 1170, FK5 639, HD 155763, HIP 83895, HR 6396, SAO 17365, WDS 17088+6543.[8]
Database references
SIMBADdata

The two components are designated Zeta Draconis A (formally named Aldhibah /ælˈdaɪbə/, after the traditional name of the system)[9] and B.

Nomenclature Edit

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).[10]

Zeta Draconis has the old Arabic name الذئب al-dhiʼb "the wolf" or "the hyena", given in its feminine form "Al Dhiʼbah" (ذئبة) in Allen (1899) (though he mistranslated it as plural "hyenas", which would be الضباع al-ḍibāʽ).[11] It shares the dual form of the name, الذئبين al-dhiʼbayn, with Eta Draconis.[12] It is also known as Nodus III (Third Knot, the knot being a loop in the tail of Draco).[13]

In 2016, the IAU organized a Working Group on Star Names (WGSN)[14] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.[15] 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.[9]

Zeta Draconis is mentioned in Hindu texts 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.[16]

In Chinese, 紫微左垣 (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.[17] Consequently, the Chinese name for Zeta Draconis itself is 紫微左垣四 (Zǐ Wēi Zuǒ Yuán sì, English: the Fourth Star of Left Wall of Purple Forbidden Enclosure),[18] representing 上弼 (Shǎngbì), meaning The First Minister.[19] 上弼 (Shǎngbì) is westernized into Shang Pih by R.H. Allen with meaning "the Higher Minister".[20]

Properties Edit

Zeta Draconis A is a giant star with a stellar classification of B6 III.[3] 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.[6] This energy is being emitted from the star's outer envelope at an effective temperature of nearly 13,400 K.[3] The azimuthal rotation velocity along the equator is at least 55 km/s.[7]

The north ecliptic pole is located at right ascension 18h and declination +66.5°.[21] This is located roughly midway between Delta Draconis and Zeta Draconis.[22] The north ecliptic pole almost coincides with the south celestial pole of Venus; Zeta Draconis is also the north pole star of Jupiter.[23]

References Edit

  1. ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. ^ a b c d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
  3. ^ a b c d e f Cenarro, A. J.; et al. (2007), "Medium-resolution Isaac Newton Telescope Library of Empirical Spectra – II. The Stellar Atmospheric Parameters", Monthly Notices of the Royal Astronomical Society, 374 (2): 664–690, arXiv:astro-ph/0611618, Bibcode:2007MNRAS.374..664C, doi:10.1111/j.1365-2966.2006.11196.x, S2CID 119428437.
  4. ^ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E.
  5. ^ Huang, W.; et al. (2012), "A catalogue of Paschen-line profiles in standard stars", Astronomy & Astrophysics, 547: A62, arXiv:1210.7893, Bibcode:2012A&A...547A..62H, doi:10.1051/0004-6361/201219804, S2CID 119286159.
  6. ^ a b c d Malagnini, M. L.; Morossi, C. (November 1990), "Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars", Astronomy and Astrophysics Supplement Series, 85 (3): 1015–1019, Bibcode:1990A&AS...85.1015M.
  7. ^ a b Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943, S2CID 14070763.
  8. ^ "Zet Dra", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2009-10-10.
  9. ^ a b "Naming Stars". IAU.org. Retrieved 16 December 2017.
  10. ^ Hessman, F. V.; Dhillon, V. S.; Winget, D. E.; Schreiber, M. R.; Horne, K.; Marsh, T. R.; Guenther, E.; Schwope, A.; Heber, U. (2010). "On the naming convention used for multiple star systems and extrasolar planets". arXiv:1012.0707 [astro-ph.SR].
  11. ^ Allen, Richard Hinckley (1899), Star-names and their meanings, New York: G. E. Stechert, p. 210.
  12. ^ Rumrill, H. B. (June 1936), "Star Name Pronunciation", Publications of the Astronomical Society of the Pacific, 48 (283): 139–154, Bibcode:1936PASP...48..139R, doi:10.1086/124681, S2CID 120743052.
  13. ^ Kaler, Jim, "Al Dhibain ("The Posterior")", Stars, University of Illinois, retrieved 2009-10-12.
  14. ^ "IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.
  15. ^ "WG Triennial Report (2015-2018) - Star Names" (PDF). p. 5. Retrieved 2018-07-14.
  16. ^ George Mason Williams (2003). Handbook of Hindu Mythology. ABC-CLIO. p. 91. ISBN 1576071065. Retrieved 17 July 2015.
  17. ^ (in Chinese) 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.
  18. ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 10 日
  19. ^ (in Chinese) English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name August 10, 2010, at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.
  20. ^ Star Name - R.H. Allen p. 210
  21. ^ Chartrand, Mark R.; Wimmer, Helmut K. (2001), Night Sky: A Guide To Field Identification, Macmillan, p. 12, ISBN 1-58238-126-7.
  22. ^ Young, Charles Augustus (1919), Anne Sewell Young (ed.), The Elements of Astronomy: a Textbook, Ginn and company, p. 69, retrieved 2009-10-12.
  23. ^ Sharrah, Paul C. (1975). "Pole Stars of Other Planets" (PDF). Arkansas Academy of Sciences Proceedings. XXIX: 62–63.


October 21, 2023
zeta, draconis, draconis, abbreviated, binary, star, northern, circumpolar, constellation, draco, with, apparent, visual, magnitude, fifth, brightest, member, this, generally, faint, constellation, distance, from, been, measured, using, parallax, technique, yi. Zeta Draconis z Draconis abbreviated Zet Dra z Dra is a binary star in the northern circumpolar constellation of Draco With an apparent visual magnitude of 3 17 2 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 330 light years 100 parsecs 1 z DraconisLocation of z Draconis circled Observation dataEpoch J2000 Equinox J2000Constellation DracoRight ascension 17h 08m 47 19596s 1 Declination 65 42 52 8634 1 Apparent magnitude V 3 17 2 CharacteristicsSpectral type B6 III 3 U B color index 0 43 2 B V color index 0 11 2 AstrometryRadial velocity Rv 17 4 km sProper motion m RA 20 43 1 mas yr Dec 19 61 1 mas yrParallax p 9 93 0 35 mas 1 Distance330 10 ly 101 4 pc Absolute magnitude MV 1 88 5 DetailsMass3 5 6 M Radius2 3 6 R Luminosity148 6 L Surface gravity log g 4 24 3 cgsTemperature13 397 3 KMetallicity Fe H 0 95 3 dexRotational velocity v sin i 55 7 km sOther designations22 Draconis BD 65 1170 FK5 639 HD 155763 HIP 83895 HR 6396 SAO 17365 WDS 17088 6543 8 Database referencesSIMBADdataThe two components are designated Zeta Draconis A formally named Aldhibah ae l ˈ d aɪ b e after the traditional name of the system 9 and B Nomenclature Editz 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 10 Zeta Draconis has the old Arabic name الذئب al dhiʼb the wolf or the hyena given in its feminine form Al Dhiʼbah ذئبة in Allen 1899 though he mistranslated it as plural hyenas which would be الضباع al ḍibaʽ 11 It shares the dual form of the name الذئبين al dhiʼbayn with Eta Draconis 12 It is also known as Nodus III Third Knot the knot being a loop in the tail of Draco 13 In 2016 the IAU organized a Working Group on Star Names WGSN 14 to catalog and standardize proper names for stars The WGSN decided to attribute proper names to individual stars rather than entire multiple systems 15 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 9 Zeta Draconis is mentioned in Hindu texts 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 16 In Chinese 紫微左垣 Zǐ Wei Zuǒ Yuan 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 17 Consequently the Chinese name for Zeta Draconis itself is 紫微左垣四 Zǐ Wei Zuǒ Yuan si English the Fourth Star of Left Wall of Purple Forbidden Enclosure 18 representing 上弼 Shǎngbi meaning The First Minister 19 上弼 Shǎngbi is westernized into Shang Pih by R H Allen with meaning the Higher Minister 20 Properties EditZeta Draconis A is a giant star with a stellar classification of B6 III 3 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 6 This energy is being emitted from the star s outer envelope at an effective temperature of nearly 13 400 K 3 The azimuthal rotation velocity along the equator is at least 55 km s 7 The north ecliptic pole is located at right ascension 18h and declination 66 5 21 This is located roughly midway between Delta Draconis and Zeta Draconis 22 The north ecliptic pole almost coincides with the south celestial pole of Venus Zeta Draconis is also the north pole star of Jupiter 23 References Edit a b c d e f van Leeuwen F November 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653 664 arXiv 0708 1752 Bibcode 2007A amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 a b c d Johnson H L et al 1966 UBVRIJKL photometry of the bright stars Communications of the Lunar and Planetary Laboratory 4 99 99 Bibcode 1966CoLPL 4 99J a b c d e f Cenarro A J et al 2007 Medium resolution Isaac Newton Telescope Library of Empirical Spectra II The Stellar Atmospheric Parameters Monthly Notices of the Royal Astronomical Society 374 2 664 690 arXiv astro ph 0611618 Bibcode 2007MNRAS 374 664C doi 10 1111 j 1365 2966 2006 11196 x S2CID 119428437 Evans D S June 20 24 1966 The Revision of the General Catalogue of Radial Velocities in Batten Alan Henry Heard John Frederick eds Determination of Radial Velocities and their Applications Proceedings from IAU Symposium no 30 University of Toronto International Astronomical Union Bibcode 1967IAUS 30 57E Huang W et al 2012 A catalogue of Paschen line profiles in standard stars Astronomy amp Astrophysics 547 A62 arXiv 1210 7893 Bibcode 2012A amp A 547A 62H doi 10 1051 0004 6361 201219804 S2CID 119286159 a b c d Malagnini M L Morossi C November 1990 Accurate absolute luminosities effective temperatures radii masses and surface gravities for a selected sample of field stars Astronomy and Astrophysics Supplement Series 85 3 1015 1019 Bibcode 1990A amp AS 85 1015M a b Royer F et al October 2002 Rotational velocities of A type stars in the northern hemisphere II Measurement of v sin i Astronomy and Astrophysics 393 897 911 arXiv astro ph 0205255 Bibcode 2002A amp A 393 897R doi 10 1051 0004 6361 20020943 S2CID 14070763 Zet Dra SIMBAD Centre de Donnees astronomiques de Strasbourg retrieved 2009 10 10 a b Naming Stars IAU org Retrieved 16 December 2017 Hessman F V Dhillon V S Winget D E Schreiber M R Horne K Marsh T R Guenther E Schwope A Heber U 2010 On the naming convention used for multiple star systems and extrasolar planets arXiv 1012 0707 astro ph SR Allen Richard Hinckley 1899 Star names and their meanings New York G E Stechert p 210 Rumrill H B June 1936 Star Name Pronunciation Publications of the Astronomical Society of the Pacific 48 283 139 154 Bibcode 1936PASP 48 139R doi 10 1086 124681 S2CID 120743052 Kaler Jim Al Dhibain The Posterior Stars University of Illinois retrieved 2009 10 12 IAU Working Group on Star Names WGSN Retrieved 22 May 2016 WG Triennial Report 2015 2018 Star Names PDF p 5 Retrieved 2018 07 14 George Mason Williams 2003 Handbook of Hindu Mythology ABC CLIO p 91 ISBN 1576071065 Retrieved 17 July 2015 in Chinese 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 in Chinese AEEA Activities of Exhibition and Education in Astronomy 天文教育資訊網 2006 年 6 月 10 日 in Chinese English Chinese Glossary of Chinese Star Regions Asterisms and Star Name Archived August 10 2010 at the Wayback Machine Hong Kong Space Museum Accessed on line November 23 2010 Star Name R H Allen p 210 Chartrand Mark R Wimmer Helmut K 2001 Night Sky A Guide To Field Identification Macmillan p 12 ISBN 1 58238 126 7 Young Charles Augustus 1919 Anne Sewell Young ed The Elements of Astronomy a Textbook Ginn and company p 69 retrieved 2009 10 12 Sharrah Paul C 1975 Pole Stars of Other Planets PDF Arkansas Academy of Sciences Proceedings XXIX 62 63 Retrieved from https en wikipedia org w index php title Zeta Draconis amp oldid 1170150416, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.