Zeta Cassiopeiae: Difference between revisions

ζ Cassiopeiae
	; ζ Cassiopeiae is found just south of the W asterism
Observation data; Epoch J2000 Equinox J2000
Constellation	Cassiopeia
Right ascension	00h 36m 58.28419s
Declination	+53° 53′ 48.8673″
Apparent magnitude (V)	3.66 (3.59 - 3.68)
Characteristics
Spectral type	B2IV
U−B color index	–0.89
B−V color index	–0.19
Variable type	SPB
Astrometry
Radial velocity (Rv)	2.0 km/s
Proper motion (μ)	RA: 17.38 mas/yr ; Dec.: –9.86 mas/yr
Parallax (π)	5.50 ± 0.16 mas
Distance	590 ± 20 ly ; (182 ± 5 pc)
Absolute magnitude (MV)	–2.8
Details
Mass	8.3 M☉
Radius	5.9 R☉
Luminosity	5,500 L☉
Surface gravity (log g)	3.81 cgs
Temperature	20,426 K
Metallicity [Fe/H]	–0.23 dex
Rotation	5.37045
Rotational velocity (v sin i)	17 ± 3 km/s
Other designations
	Fulu, Zet Cas, ζ Cas, 17 Cassiopeiae, BD+53°105, FK5 17, GC 727, HD 3360, HIP 2920, HR 153, SAO 21566
Database references
SIMBAD	data

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Zeta Cassiopeiae, Latinized from ζ Cassiopeiae, and officially named Fulu /ˈfuːluː/,^[9] is a variable star^[8] in the constellation of Cassiopeia. It has a blue-white hue and is classified as a B-type subgiant with an apparent magnitude of +3.66. Based upon parallax measurements, it is approximately 590 light-years from the Sun.

Nomenclature

ζ Cassiopeiae (Latinised to Zeta Cassiopeiae) is the star's Bayer designation.

In Chinese astronomy, Zeta Cassiopeiae is called 附路, Pinyin: Fùlù, meaning Auxiliary Road, because this star is marking itself and standing alone in the Auxiliary Road asterism, Legs (mansion) (see Chinese constellation).^[10] 附路 (Fùlù) was westernized into Foo Loo, but that name was also designated for Eta Cassiopeiae by R.H. Allen, with the meaning of "a by-path" ^[11] In 2016, the IAU organized a Working Group on Star Names (WGSN)^[12] to catalog and standardize proper names for stars. The WGSN approved the name Fulu for Zeta Cassiopeiae on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.^[9]

Properties

Zeta Cassiopeiae is a B2 subgiant, indicating that it has exhausted its core hydrogen and started to evolve away from the main sequence. It has a temperature of over 20,000 K, is about eight times the mass of the sun, and is 5,500 times as luminous.

Variability

A light curve for Zeta Cassiopeiae, plotted from *TESS* data^[13]

Zeta Cassiopeiae is a probable member of an unusual group of variable stars known as "Slowly Pulsating B" (SPB) stars.^[14] It shows a pulsation frequency of 0.64 per day (or once every 1.56 days) and displays a weak magnetic field with a strength of roughly 3.35 × 10⁻² T, which varies with a period of 5.37 days.^[15] This likely matches the rotation rate of the star, which, when combined with the low projected rotational velocity, indicates the star may be seen nearly pole-on. Zeta Cassiopeiae is a candidate magnetic Bp star that shows an overabundance of helium. The star contains a randomly oriented fossil magnetic field, which impacts the outflow of the stellar wind. Collisions between streams from this stellar wind creates a shock front, with cooling particles settling toward a co-rotating disk.^[16]

References

^ ^a ^b ^c ^d ^e 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
^ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
^ ^a ^b ^c ^d Neiner, C.; Geers, V. C.; Henrichs, H. F.; Floquet, M.; Frémat, Y.; Hubert, A.-M.; Preuss, O.; Wiersema, K. (2003). "Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae" (PDF). Astronomy and Astrophysics. 406 (3): 1019. Bibcode:2003A&A...406.1019N. doi:10.1051/0004-6361:20030742.
^ Morgan, W. W.; Keenan, P. C. (1973), "Spectral Classification", Annual Review of Astronomy and Astrophysics, 11: 29, Bibcode:1973ARA&A..11...29M, doi:10.1146/annurev.aa.11.090173.000333
^ ^a ^b 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
^ Jaschek, C.; Gomez, A. E. (1998). "The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes". Astronomy and Astrophysics. 330: 619. Bibcode:1998A&A...330..619J.
^ Gies, Douglas R.; Lambert, David L. (March 1992), "Carbon, nitrogen, and oxygen abundances in early B-type stars", Astrophysical Journal, Part 1, 387: 673–700, Bibcode:1992ApJ...387..673G, doi:10.1086/171116
^ ^a ^b "Zeta Cas -- Pulsating variable Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2010-02-22
^ ^a ^b "Naming Stars". IAU.org. Retrieved 16 December 2017.
^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 9 日 Archived 2011-05-22 at the Wayback Machine
^ Richard Hinckley Allen: Star Names — Their Lore and Meaning: Cassiopeia
^ "IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.
^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 24 December 2024.
^ Neiner, C.; et al. (2003), "Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae", Astronomy and Astrophysics, 406 (3): 1019–1031, Bibcode:2003A&A...406.1019N, doi:10.1051/0004-6361:20030742
^ De Cat, P. (June 2007), "Observational Asteroseismology of slowly pulsating B stars", Communications in Asteroseismology, 150: 167–174, Bibcode:2007CoAst.150..167D, doi:10.1553/cia150s167
^ Smith, M. A.; Bohlender, D. A. (May 2007), "Variations of the ultraviolet resonance lines of the B2 IV-V star ζ Cassiopeiae", Astronomy and Astrophysics, 466 (2): 675–682, arXiv:astro-ph/0702461, Bibcode:2007A&A...466..675S, doi:10.1051/0004-6361:20066639, S2CID 59063221

[aaa474_2_653-1] 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

[ducati-2] Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.

[neiner-3] Neiner, C.; Geers, V. C.; Henrichs, H. F.; Floquet, M.; Frémat, Y.; Hubert, A.-M.; Preuss, O.; Wiersema, K. (2003). "Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae" (PDF). Astronomy and Astrophysics. 406 (3): 1019. Bibcode:2003A&A...406.1019N. doi:10.1051/0004-6361:20030742.

[araa11_29-4] Morgan, W. W.; Keenan, P. C. (1973), "Spectral Classification", Annual Review of Astronomy and Astrophysics, 11: 29, Bibcode:1973ARA&A..11...29M, doi:10.1146/annurev.aa.11.090173.000333

[clpl4-5] 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

[6] Jaschek, C.; Gomez, A. E. (1998). "The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes". Astronomy and Astrophysics. 330: 619. Bibcode:1998A&A...330..619J.

[spj1_387_673-7] Gies, Douglas R.; Lambert, David L. (March 1992), "Carbon, nitrogen, and oxygen abundances in early B-type stars", Astrophysical Journal, Part 1, 387: 673–700, Bibcode:1992ApJ...387..673G, doi:10.1086/171116

[SIMBAD-8] "Zeta Cas -- Pulsating variable Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2010-02-22

[IAU-LSN-9] "Naming Stars". IAU.org. Retrieved 16 December 2017.

[10] (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 9 日 Archived 2011-05-22 at the Wayback Machine

[11] Richard Hinckley Allen: Star Names — Their Lore and Meaning: Cassiopeia

[WGSN-12] "IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.

[MAST-13] "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 24 December 2024.

[aaa406_3_1019-14] Neiner, C.; et al. (2003), "Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae", Astronomy and Astrophysics, 406 (3): 1019–1031, Bibcode:2003A&A...406.1019N, doi:10.1051/0004-6361:20030742

[cia150_167-15] De Cat, P. (June 2007), "Observational Asteroseismology of slowly pulsating B stars", Communications in Asteroseismology, 150: 167–174, Bibcode:2007CoAst.150..167D, doi:10.1553/cia150s167

[aaa466_2_675-16] Smith, M. A.; Bohlender, D. A. (May 2007), "Variations of the ultraviolet resonance lines of the B2 IV-V star ζ Cassiopeiae", Astronomy and Astrophysics, 466 (2): 675–682, arXiv:astro-ph/0702461, Bibcode:2007A&A...466..675S, doi:10.1051/0004-6361:20066639, S2CID 59063221

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@@ Line 1: / Line 1: @@
+{{short description|Star in the constellation Cassiopeia}}
 {{Starbox begin
 | name=ζ Cassiopeiae
@@ Line 10: / Line 11: @@
 | ra = {{RA|00|36|58.28419}}<ref name=aaa474_2_653/>
 | dec = {{DEC|+53|53|48.8673}}<ref name=aaa474_2_653/>
-| appmag_v = 3.66<ref name=ducati>{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|pages=0|author1=Ducati|first1=J. R.|year=2002}}</ref> (3.59 - 3.68<ref name=neiner/>)
+| appmag_v = 3.66<ref name=ducati>{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|pages=0|last1=Ducati|first1=J. R.|year=2002}}</ref> (3.59 - 3.68<ref name=neiner/>)
 | constell = [[Cassiopeia (constellation)|Cassiopeia]]
 }}
@@ Line 20: / Line 21: @@
 }}
 {{Starbox astrometry
-| radial_v = 2.0<ref name=neiner>{{cite journal|bibcode=2003A&A...406.1019N|title=Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae|journal=Astronomy and Astrophysics|volume=406|issue=3|pages=1019|author1=Neiner|first1=C.|last2=Geers|first2=V. C.|last3=Henrichs|first3=H. F.|last4=Floquet|first4=M.|last5=Frémat|first5=Y.|last6=Hubert|first6=A.-M.|last7=Preuss|first7=O.|last8=Wiersema|first8=K.|year=2003|doi=10.1051/0004-6361:20030742}}</ref>
+| radial_v = 2.0<ref name=neiner>{{cite journal|bibcode=2003A&A...406.1019N|title=Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae|journal=Astronomy and Astrophysics|volume=406|issue=3|pages=1019|last1=Neiner|first1=C.|last2=Geers|first2=V. C.|last3=Henrichs|first3=H. F.|last4=Floquet|first4=M.|last5=Frémat|first5=Y.|last6=Hubert|first6=A.-M.|last7=Preuss|first7=O.|last8=Wiersema|first8=K.|year=2003|doi=10.1051/0004-6361:20030742|url=https://pure.uva.nl/ws/files/3406231/26289_119499y.pdf|doi-access=free}}</ref>
 | prop_mo_ra = 17.38<ref name=aaa474_2_653/>
 | prop_mo_dec = –9.86<ref name=aaa474_2_653/>
@@ Line 26: / Line 27: @@
 | p_error = 0.16
 | parallax_footnote = <ref name=aaa474_2_653/>
-| absmag_v = –2.8<ref>{{cite journal|bibcode=1998A&A...330..619J|title=The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes|journal=Astronomy and Astrophysics|volume=330|pages=619|author1=Jaschek|first1=C.|last2=Gomez|first2=A. E.|year=1998}}</ref>
+| absmag_v = –2.8<ref>{{cite journal|bibcode=1998A&A...330..619J|title=The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes|journal=Astronomy and Astrophysics|volume=330|pages=619|last1=Jaschek|first1=C.|last2=Gomez|first2=A. E.|year=1998}}</ref>
 }}
 {{Starbox detail
-| mass = 8.3<ref name=neiner/>
+| source=<ref name=neiner/>
+| mass = 8.3
-| radius = 5.9<ref name=neiner/>
+| radius = 5.9
-| luminosity = 5,500<ref name=neiner/>
+| luminosity = 5,500
-| temperature = 20,426<ref name=neiner/>
+| temperature = 20,426
-| gravity = 3.81<ref name=neiner/>
+| gravity = 3.81
 | metal_fe = –0.23<ref name=spj1_387_673/>
-| rotational_velocity = 17 ± 3<ref name=neiner/>
+| rotational_velocity = 17 ± 3
-| rotation = 5.37045<ref name=neiner/>
+| rotation = 5.37045
 | age =
 }}
 {{Starbox catalog
-| names=Fulu, 17&nbsp;Cassiopeiae, [[Harvard Revised catalogue|HR]]&nbsp;153, [[Henry Draper Catalogue|HD]]&nbsp;3360, [[Bonner Durchmusterung|BD]]+53°105, [[Fifth Fundamental Catalogue|FK5]]&nbsp;17, [[Hipparcos catalogue|HIP]]&nbsp;2920, [[Smithsonian Astrophysical Observatory catalogue|SAO]]&nbsp;21566, GC&nbsp;727<ref name=SIMBAD/>
+| names = {{odlist | name=Fulu | B=Zet Cas, ζ Cas | F=17&nbsp;Cassiopeiae | HR=153 | HD=3360 | BD=+53°105 | FK5=17 | HIP=2920 | SAO=21566 | GC=727 }}<ref name=SIMBAD/>
 }}
 {{Starbox reference
@@ Line 47: / Line 49: @@
 {{Starbox end}}
-'''Zeta Cassiopeiae''' ('''ζ Cassiopeiae''', abbreviated '''Zet Cas''', '''ζ Cas'''), officially named '''Fulu''' {{IPAc-en|'|f|uː|l|uː}},<ref name="IAU-LSN">{{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |accessdate=16 December 2017}}</ref> is a [[variable star]]<ref name=SIMBAD/> in the [[constellation]] of [[Cassiopeia (constellation)|Cassiopeia]]. It has a blue-white hue and is classified as a [[stellar classification#Class B|B-type]] [[subgiant]] with an [[apparent magnitude]] of +3.66. Based upon [[stellar parallax|parallax]] measurements, it is approximately 590 [[light-year]]s from the [[Sun]].
+'''Zeta Cassiopeiae''', [[Romanization of Greek|Latinized]] from '''ζ Cassiopeiae''', and officially named '''Fulu''' {{IPAc-en|'|f|uː|l|uː}},<ref name="IAU-LSN">{{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |access-date=16 December 2017}}</ref> is a [[variable star]]<ref name=SIMBAD/> in the [[constellation]] of [[Cassiopeia (constellation)|Cassiopeia]]. It has a blue-white hue and is classified as a [[stellar classification#Class B|B-type]] [[subgiant]] with an [[apparent magnitude]] of +3.66. Based upon [[stellar parallax|parallax]] measurements, it is approximately 590 [[light-year]]s from the [[Sun]].
 == Nomenclature ==
@@ Line 53: / Line 55: @@
 ''ζ Cassiopeiae'' ([[Latinisation of names|Latinised]] to ''Zeta Cassiopeiae'') is the star's [[Bayer designation]].
-In [[Chinese astronomy]], Zeta Cassiopeiae is called 附路, [[Pinyin]]: Fùlù, meaning ''	Auxiliary Road'', because this star is marking itself and standing alone in the ''Auxiliary Road'' [[asterism (astronomy)|asterism]], ''[[Legs (Chinese constellation)|Legs]]'' (mansion) (see : [[Chinese constellation]]).<ref>{{zh icon}} [http://aeea.nmns.edu.tw/2006/0607/ap060709.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 9 日]</ref> 附路 (Fùlù) was westernized into ''Foo Loo'', but that name was also designated for [[Eta Cassiopeiae]] by R.H. Allen, with the meaning of "a by-path" <ref>[http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Cassiopeia*.html Richard Hinckley Allen: Star Names — Their Lore and Meaning: Cassiopeia]</ref> In 2016, the IAU organized a [[IAU Working Group on Star Names|Working Group on Star Names]] (WGSN)<ref name="WGSN">{{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}}</ref> to catalog and standardize proper names for stars. The WGSN approved the name ''Fulu'' for Zeta Cassiopeiae on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.<ref name="IAU-LSN"/>
+In [[Chinese astronomy]], Zeta Cassiopeiae is called 附路, [[Pinyin]]: Fùlù, meaning ''	Auxiliary Road'', because this star is marking itself and standing alone in the ''Auxiliary Road'' [[asterism (astronomy)|asterism]], ''[[Legs (Chinese constellation)|Legs]]'' (mansion) (see [[Chinese constellation]]).<ref>{{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0607/ap060709.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 9 日] {{Webarchive|url=https://web.archive.org/web/20110522000830/http://aeea.nmns.edu.tw/2006/0607/ap060709.html |date=2011-05-22 }}</ref> 附路 (Fùlù) was westernized into ''Foo Loo'', but that name was also designated for [[Eta Cassiopeiae]] by R.H. Allen, with the meaning of "a by-path" <ref>[https://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Cassiopeia*.html Richard Hinckley Allen: Star Names — Their Lore and Meaning: Cassiopeia]</ref> In 2016, the IAU organized a [[IAU Working Group on Star Names|Working Group on Star Names]] (WGSN)<ref name="WGSN">{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|access-date=22 May 2016}}</ref> to catalog and standardize proper names for stars. The WGSN approved the name ''Fulu'' for Zeta Cassiopeiae on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.<ref name="IAU-LSN"/>
 == Properties ==
@@ Line 60: / Line 62: @@
 === Variability ===
+[[File:ZetaCasLightCurve.png|thumb|left|A [[light curve]] for Zeta Cassiopeiae, plotted from ''[[Transiting Exoplanet Survey Satellite|TESS]]'' data<ref name=MAST/>]]
 Zeta Cassiopeiae is a probable member of an unusual group of variable stars known as "[[slowly pulsating B star|Slowly Pulsating B]]" (SPB) stars.<ref name=aaa406_3_1019/> It shows a pulsation frequency of 0.64 per day (or once every 1.56 days) and displays a weak [[Stellar magnetic field|magnetic field]] with a strength of roughly {{nowrap|3.35 × 10<sup>−2</sup> [[Tesla (unit)|T]]}}, which varies with a period of 5.37 days.<ref name=cia150_167/> This likely matches the rotation rate of the star, which, when combined with the low [[Stellar rotation|projected rotational velocity]], indicates the star may be seen nearly pole-on. Zeta Cassiopeiae is a candidate magnetic [[Bp star]] that shows an overabundance of helium. The star contains a randomly oriented [[Fossil stellar magnetic field|fossil magnetic field]], which impacts the outflow of the stellar wind. Collisions between streams from this stellar wind creates a shock front, with cooling particles settling toward a co-rotating disk.<ref name=aaa466_2_675/>
@@ Line 65: / Line 68: @@
 {{reflist|refs=
-<ref name=aaa474_2_653>{{citation | last1=van Leeuwen | first1=F. | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 |date=November 2007 | doi=10.1051/0004-6361:20078357 | bibcode=2007A&A...474..653V |arxiv = 0708.1752 }}</ref>
+<ref name=aaa474_2_653>{{citation | last1=van Leeuwen | first1=F. | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 |date=November 2007 | doi=10.1051/0004-6361:20078357 | bibcode=2007A&A...474..653V |arxiv = 0708.1752 | s2cid=18759600 }}</ref>
-<ref name=SIMBAD>{{citation | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HR153 | title=Zeta Cas -- Pulsating variable Star | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | accessdate=2010-02-22 }}</ref>
+<ref name=SIMBAD>{{citation | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HR153 | title=Zeta Cas -- Pulsating variable Star | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | access-date=2010-02-22 }}</ref>
+<ref name=MAST>{{cite web |title=MAST: Barbara A. Mikulski Archive for Space Telescopes |url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html |publisher=Space Telescope Science Institute |access-date=24 December 2024}}</ref>
-<ref name=aaa406_3_1019>{{citation | display-authors=1 | last1=Neiner | first1=C. | last2=Geers | first2=V. C. | last3=Henrichs | first3=H. F. | last4=Floquet | first4=M. | last5=Frémat | first5=Y. | last6=Hubert | first6=A.-M. | last7=Preuss | first7=O. | last8=Wiersema | first8=K. | title=Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae | journal=Astronomy and Astrophysics | year=2003 | volume=406 | issue=3 | pages=1019–1031 | bibcode=2003A&A...406.1019N  | doi=10.1051/0004-6361:20030742 }}</ref>
-<ref name=spj1_387_673>{{citation | last1=Gies | first1=Douglas R. | last2=Lambert | first2=David L. | title=Carbon, nitrogen, and oxygen abundances in early B-type stars | journal=Astrophysical Journal, Part 1 | volume=387 | pages=673–700 |date=March 1992 | doi=10.1086/171116 | bibcode=1992ApJ...387..673G }}</ref>
+<ref name=aaa406_3_1019>{{citation | display-authors=1 | last1=Neiner | first1=C. | last2=Geers | first2=V. C. | last3=Henrichs | first3=H. F. | last4=Floquet | first4=M. | last5=Frémat | first5=Y. | last6=Hubert | first6=A.-M. | last7=Preuss | first7=O. | last8=Wiersema | first8=K. | title=Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae | journal=Astronomy and Astrophysics | year=2003 | volume=406 | issue=3 | pages=1019–1031 | bibcode=2003A&A...406.1019N  | doi=10.1051/0004-6361:20030742 | doi-access=free }}</ref>
+<ref name=spj1_387_673>{{citation | last1=Gies | first1=Douglas R. | last2=Lambert | first2=David L. | title=Carbon, nitrogen, and oxygen abundances in early B-type stars | journal=Astrophysical Journal, Part 1 | volume=387 | pages=673–700 |date=March 1992 | doi=10.1086/171116 | bibcode=1992ApJ...387..673G | doi-access=free }}</ref>
 <ref name=araa11_29>{{citation | last1=Morgan | first1=W. W. | last2=Keenan | first2=P. C. | title=Spectral Classification | journal=Annual Review of Astronomy and Astrophysics | volume=11 | page=29 | year=1973 | doi=10.1146/annurev.aa.11.090173.000333 | bibcode=1973ARA&A..11...29M }}</ref>
@@ Line 77: / Line 82: @@
 <ref name=clpl4>{{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 | pages=99 | year=1966 | bibcode=1966CoLPL...4...99J }}</ref>
-<ref name=cia150_167>{{citation | last1=De Cat | first1=P. | title=Observational Asteroseismology of slowly pulsating B stars | journal=Communications in Astroseismology | volume=150 | pages=167–174 |date=June 2007 | doi=10.1553/cia150s167 | bibcode=2007CoAst.150..167D }}</ref>
+<ref name=cia150_167>{{citation | last1=De Cat | first1=P. | title=Observational Asteroseismology of slowly pulsating B stars | journal=  Communications in Asteroseismology| volume=150 | pages=167–174 |date=June 2007 | doi=10.1553/cia150s167 | bibcode=2007CoAst.150..167D | doi-access=free }}</ref>
-<ref name=aaa466_2_675>{{citation | last1=Smith | first1=M. A. | last2=Bohlender | first2=D. A. | title=Variations of the ultraviolet resonance lines of the B2 IV-V star ζ Cassiopeiae | journal=Astronomy and Astrophysics | volume=466 | issue=2 | pages=675–682 |date=May 2007 | doi=10.1051/0004-6361:20066639 | bibcode=2007A&A...466..675S |arxiv = astro-ph/0702461 }}</ref>
+<ref name=aaa466_2_675>{{citation | last1=Smith | first1=M. A. | last2=Bohlender | first2=D. A. | title=Variations of the ultraviolet resonance lines of the B2 IV-V star ζ Cassiopeiae | journal=Astronomy and Astrophysics | volume=466 | issue=2 | pages=675–682 |date=May 2007 | doi=10.1051/0004-6361:20066639 | bibcode=2007A&A...466..675S |arxiv = astro-ph/0702461 | s2cid=59063221 }}</ref>
 }}
@@ Line 89: / Line 94: @@
 [[Category:B-type subgiants]]
 [[Category:Cassiopeia (constellation)]]
-[[Category:Slowly pulsating B stars]]
+[[Category:Slowly pulsating B-type stars]]
-[[Category:HR objects|0153]]
+[[Category:Bright Star Catalogue objects|0153]]
 [[Category:Henry Draper Catalogue objects|003360]]
 [[Category:Hipparcos objects|002920]]

Observation data Epoch J2000 Equinox J2000
ζ Cassiopeiae is found just south of the W asterism
Constellation	Cassiopeia
Right ascension	00^h 36^m 58.28419^s^[1]
Declination	+53° 53′ 48.8673″^[1]
Apparent magnitude (V)	3.66^[2] (3.59 - 3.68^[3])
Characteristics
Spectral type	B2IV^[4]
U−B color index	–0.89^[5]
B−V color index	–0.19^[5]
Variable type	SPB^[3]
Astrometry

Radial velocity (R_v)	2.0^[3] km/s
Proper motion (μ)	RA: 17.38^[1] mas/yr Dec.: –9.86^[1] mas/yr
Parallax (π)	5.50 ± 0.16 mas^[1]
Distance	590 ± 20 ly (182 ± 5 pc)
Absolute magnitude (M_V)	–2.8^[6]

Details^[3]

Mass	8.3 `M`_☉
Radius	5.9 `R`_☉
Luminosity	5,500 `L`_☉
Surface gravity (log g)	3.81 cgs
Temperature	20,426 K
Metallicity [Fe/H]	–0.23^[7] dex
Rotation	5.37045
Rotational velocity (v sin i)	17 ± 3 km/s

Other designations
Fulu, Zet Cas, ζ Cas, 17 Cassiopeiae, BD+53°105, FK5 17, GC 727, HD 3360, HIP 2920, HR 153, SAO 21566^[8]
Database references
SIMBAD	data