Beta Sextantis: Difference between revisions

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  | equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
  | equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
  | constell = [[Sextans]]
  | constell = [[Sextans]]
  | ra = {{RA| 10|30|17.48}}<ref name = GaiaDR2/>
  | ra = {{RA| 10|30|17.48029}}<ref name = GaiaDR3/>
  | dec = {{DEC|−00|38|13.3}}<ref name = GaiaDR2/>
  | dec = {{DEC|−00|38|13.3145}}<ref name = GaiaDR3/>
  | appmag_v = 5.07<ref name=Crawford1971/>
  | appmag_v = 5.07<ref name=Crawford1971/>
}}
}}
{{Starbox character
{{Starbox character
  | type = [[main sequence]]<ref name=zorec2012/>
  | type = [[Main sequence]]<ref name=zorec2012/>
  | class = B6&nbsp;V<ref name=Mathys1986/> or B5&nbsp;IV/V<ref name=houk1999/>
  | class = B6&nbsp;V<ref name=Mathys1986/> or B5&nbsp;IV/V<ref name=houk1999/>
  | b-v = −0.14<ref name=Crawford1971/>
  | b-v = −0.14<ref name=Crawford1971/>
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{{Starbox astrometry
{{Starbox astrometry
  | radial_v = {{Val|11.6|2.8}}<ref name=deBruijne2012/>
  | radial_v = {{Val|11.6|2.8}}<ref name=deBruijne2012/>
  | prop_mo_ra = −38.805<ref name = GaiaDR2/>
  | prop_mo_ra = −39.290
  | prop_mo_dec = −24.290<ref name = GaiaDR2/>
  | prop_mo_dec = −23.582
  | parallax = 8.9613
| pm_footnote = <ref name = GaiaDR3/>
  | p_error = 0.2448
  | parallax = 8.8899
  | parallax_footnote = <ref name = GaiaDR2/>
  | p_error = 0.1477
  | absmag_v = −0.38<ref name=Anderson2012/>
  | parallax_footnote = <ref name = GaiaDR3/>
  | absmag_v = −0.38<ref name=XHIP/>
}}
}}
{{Starbox detail
{{Starbox detail
  | mass = 4.0<ref name=zorec2012/>
  | mass = {{Val|4.01|0.07}}<ref name=zorec2012/>
  | radius = 3.2<ref name=PasinettiFracassini2001/>
  | radius = 3.00<ref name=tycho-gaia/>
  | luminosity = 184<ref name=Mcdonald2012/>
  | luminosity = 330<ref name=zorec2012/>
  | temperature = 14,570<ref name=Hempel2003/>
  | temperature = 13,870<ref name=zorec2012/>
  | gravity = 4.21<ref name=Hempel2003/>
  | gravity = 4.21<ref name=Hempel2003/>
  | metal_fe = 0.19<ref name=Hempel2003/>
  | metal_fe = 0.19<ref name=Hempel2003/>
Line 50: Line 51:
}}
}}
{{starbox end}}
{{starbox end}}
'''Beta Sextantis''', [[Latinisation of names|Latinized]] from β Sextantis, is a [[variable star]] in the equatorial [[constellation]] of [[Sextans]]. With an [[apparent visual magnitude]] of 5.07,<ref name=Crawford1971/> it is faintly visible to the naked eye on a dark night. According to the [[Bortle scale]], it can be viewed from brighter lit suburban skies. The distance to this star, based upon an annual [[stellar parallax|parallax shift]] of 8.96 [[milliarcsecond|mas]],<ref name = GaiaDR2/> is around 364 [[light year]]s.
'''Beta Sextantis''', [[Latinisation of names|Latinized]] from β Sextantis, is a [[variable star]] in the equatorial [[constellation]] of [[Sextans]]. With an [[apparent visual magnitude]] of 5.07,<ref name=Crawford1971/> it is faintly visible to the naked eye on a dark night. According to the [[Bortle scale]], it can be viewed from brighter lit suburban skies. The distance to this star, based upon an annual [[stellar parallax|parallax shift]] of 8.89 [[milliarcsecond|mas]],<ref name = GaiaDR3/> is around 367 [[light year]]s.


This star served as a primary standard in the [[MK spectral classification]] system with a [[stellar classification]] of B6&nbsp;V,<ref name=Mathys1986/> indicating that it is a [[B-type main sequence star]]. However, Houk and Swift (1999) list a classification of B5&nbsp;IV/V, suggesting it may be [[stellar evolution|transitioning]] into a [[subgiant star]].<ref name=houk1999/> It has served as a ''uvby'' [[photometry (astronomy)|photometric]] standard, but is also categorized as an [[Alpha2 Canum Venaticorum variable|Alpha<sup>2</sup> Canum Venaticorum variable]]<ref name=Kholopov1989/> with a suspected period of 15.4&nbsp;days. This lengthy a period conflicts with a relatively high [[projected rotational velocity]] of 85&nbsp;km/s, leaving the explanation for the variance unresolved.<ref name=Hempel2003/><ref name=Mathys1986/>
This star served as a primary standard in the [[MK spectral classification]] system with a [[stellar classification]] of B6&nbsp;V,<ref name=Mathys1986/> indicating that it is a [[B-type main sequence star]]. However, Houk and Swift (1999) list a classification of B5&nbsp;IV/V, suggesting it may be [[stellar evolution|transitioning]] into a [[subgiant star]].<ref name=houk1999/> [[Stellar evolution]] models support this is a main sequence star.<ref name=zorec2012/> It has served as a ''uvby'' [[photometry (astronomy)|photometric]] standard, but is also categorized as an [[Alpha2 Canum Venaticorum variable|Alpha<sup>2</sup> Canum Venaticorum variable]]<ref name=Kholopov1989/> with a suspected period of 15.4&nbsp;days. This lengthy a period conflicts with a relatively high [[projected rotational velocity]] of 85&nbsp;km/s, leaving the explanation for the variance unresolved.<ref name=Hempel2003/><ref name=Mathys1986/>


==References==
==References==
{{reflist|refs=
{{reflist|refs=


<ref name = GaiaDR2>{{Cite DR2|3782940437640705408}}</ref>
<ref name=SIMBAD>{{cite simbad | title=bet Sex | accessdate=2016-12-13 }}</ref>
 
<ref name = GaiaDR3>{{Cite DR3|3782940437640705408}}</ref>


<ref name=MAST>{{cite web
<ref name=MAST>{{cite web
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<ref name=gontcharov2012>{{cite journal |bibcode=2012AstL...38..771G |title=Dependence of kinematics on the age of stars in the solar neighborhood |last1=Gontcharov |first1=G. A. |journal=Astronomy Letters |date=2012 |volume=38 |issue=12 |page=771 |doi=10.1134/S1063773712120031 |arxiv=1606.08814 }}</ref>
<ref name=gontcharov2012>{{cite journal |bibcode=2012AstL...38..771G |title=Dependence of kinematics on the age of stars in the solar neighborhood |last1=Gontcharov |first1=G. A. |journal=Astronomy Letters |date=2012 |volume=38 |issue=12 |page=771 |doi=10.1134/S1063773712120031 |arxiv=1606.08814 }}</ref>


<ref name=Anderson2012>{{citation
<ref name=tycho-gaia>{{cite journal |last1=McDonald |first1=I. |last2=Zijlstra |first2=A. A. |last3=Watson |first3=R. A. |date=2017-10-01 |title=Fundamental parameters and infrared excesses of Tycho-Gaia stars  |journal=Monthly Notices of the Royal Astronomical Society |volume=471 |pages=770–791 |doi=10.1093/mnras/stx1433 |doi-access=free |issn=0035-8711|arxiv=1706.02208 |bibcode=2017MNRAS.471..770M }}</ref>
| title=XHIP: An extended hipparcos compilation
| last1=Anderson | first1=E. | last2=Francis | first2=Ch.
| journal=Astronomy Letters
| volume=38 | issue=5 | pages=331 | year=2012
| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015
| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}</ref>


<ref name=Mathys1986>{{citation
<ref name=XHIP>{{cite XHIP|51437}}</ref>
 
<ref name=Mathys1986>{{cite journal
  | title=Photometric variability of some early-type stars
  | title=Photometric variability of some early-type stars
  | display-authors=1 | last1=Mathys | first1=G.
  | display-authors=1 | last1=Mathys | first1=G.
Line 82: Line 81:
  | journal=Astronomy and Astrophysics Supplement Series
  | journal=Astronomy and Astrophysics Supplement Series
  | volume=63 | issue=3 | pages=403–416 | date=March 1986
  | volume=63 | issue=3 | pages=403–416 | date=March 1986
  | bibcode=1986A&AS...63..403M | postscript=. }}</ref>
  | bibcode=1986A&AS...63..403M }}</ref>


<ref name=houk1999>{{citation
<ref name=houk1999>{{cite journal
  | title=Michigan catalogue of two-dimensional spectral types for the HD Stars
  | title=Michigan catalogue of two-dimensional spectral types for the HD Stars
  | last1=Houk | first1=N. | last2=Swift | first2=C.
  | last1=Houk | first1=N. | last2=Swift | first2=C.
Line 90: Line 89:
  | publisher=Department of Astronomy, University of Michigan
  | publisher=Department of Astronomy, University of Michigan
  | publication-place=Ann Arbor, Michigan | volume=5 | year=1999
  | publication-place=Ann Arbor, Michigan | volume=5 | year=1999
  | bibcode=1999MSS...C05....0H | postscript=. }}</ref>
  | bibcode=1999MSS...C05....0H }}</ref>


<ref name=Kholopov1989>{{citation
<ref name=Kholopov1989>{{cite journal
  | title=The 69th Name-List of Variable Stars
  | title=The 69th Name-List of Variable Stars
  | display-authors=1 | last1=Kholopov | first1=P. N.
  | display-authors=1 | last1=Kholopov | first1=P. N.
Line 99: Line 98:
  | journal=Information Bulletin on Variable Stars
  | journal=Information Bulletin on Variable Stars
  | issue=3323 | page=1 | date=April 1989
  | issue=3323 | page=1 | date=April 1989
  | volume=3323 | bibcode=1989IBVS.3323....1K | postscript=. }}</ref>
  | volume=3323 | bibcode=1989IBVS.3323....1K  }}</ref>
 
<ref name=PasinettiFracassini2001>{{citation
  | last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L.
| last3=Covino | first3=S. | last4=Pozzi | first4=A.
| title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)
| edition=3rd | journal=Astronomy and Astrophysics | display-authors=1
| volume=367 | pages=521–524 | date=February 2001
| issue=2 | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P
| arxiv=astro-ph/0012289 | s2cid=425754 | postscript=. }}</ref>


<ref name=Hempel2003>{{citation
<ref name=Hempel2003>{{cite journal
  | title=Abundance analysis of late B stars. Evidence for diffusion and against weak stellar winds
  | title=Abundance analysis of late B stars. Evidence for diffusion and against weak stellar winds
  | last1=Hempel | first1=M. | last2=Holweger | first2=H.
  | last1=Hempel | first1=M. | last2=Holweger | first2=H.
  | journal=Astronomy and Astrophysics | postscript=.
  | journal=Astronomy and Astrophysics  
  | volume=408 | pages=1065–1076 | date=September 2003
  | volume=408 | pages=1065–1076 | date=September 2003
  | issue=3 | doi=10.1051/0004-6361:20030889 | bibcode=2003A&A...408.1065H | doi-access=free }}</ref>
  | issue=3 | doi=10.1051/0004-6361:20030889 | bibcode=2003A&A...408.1065H | doi-access=free }}</ref>


<ref name=deBruijne2012>{{citation
<ref name=deBruijne2012>{{cite journal
  | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C.
  | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C.
  | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project
  | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project
Line 123: Line 113:
  | volume=546 | id=A61 | pages=14 | date=October 2012
  | volume=546 | id=A61 | pages=14 | date=October 2012
  | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D
  | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D
  | arxiv=1208.3048 | s2cid=59451347 | postscript=. }}</ref>
  | arxiv=1208.3048 | s2cid=59451347  }}</ref>
 
<ref name=Mcdonald2012>{{citation
  | display-authors=1 | last1=McDonald | first1=I.
| last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L.
| title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars
| journal=Monthly Notices of the Royal Astronomical Society
| volume=427 | issue=1 | pages=343–57 | date=2012
| bibcode=2012MNRAS.427..343M | arxiv=1208.2037
| doi=10.1111/j.1365-2966.2012.21873.x | doi-access=free | s2cid=118665352 | postscript=. }}</ref>


<ref name=Crawford1971>{{citation
<ref name=Crawford1971>{{cite journal
  | display-authors=1 | last1=Crawford | first1=D. L.
  | display-authors=1 | last1=Crawford | first1=D. L.
  | last2=Barnes | first2=J. V. | last3=Golson | first3=J. C.
  | last2=Barnes | first2=J. V. | last3=Golson | first3=J. C.
Line 141: Line 122:
  | year=1971 | pages=1058 | volume=76
  | year=1971 | pages=1058 | volume=76
  | bibcode=1971AJ.....76.1058C | doi=10.1086/111220
  | bibcode=1971AJ.....76.1058C | doi=10.1086/111220
| postscript=. }}</ref>
  }}</ref>
 
<ref name=SIMBAD>{{citation
| title=bet Sex -- Variable Star of alpha2 CVn type
| work=SIMBAD Astronomical Database
| publisher=[[Centre de Données astronomiques de Strasbourg]]
| url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=bet+Sex
| accessdate=2016-12-13 | postscript=. }}</ref>


}}
}}


{{Stars of Sextans|state=collapsed}}
{{Stars of Sextans|state=collapsed}}
 
{{sky|10|30|17.48|-|00|38|13.3}}
{{DEFAULTSORT:Beta Sextantis}}
{{DEFAULTSORT:Beta Sextantis}}
[[Category:Alpha2 Canum Venaticorum variables]]
[[Category:Alpha2 Canum Venaticorum variables]]

Latest revision as of 00:13, 29 June 2025

Template:Short description

β Sextantis
File:BetSexLightCurve.png
A light curve for Beta Sextantis, plotted from TESS data,[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Sextans
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.07[3]
Characteristics
Evolutionary stage Main sequence[4]
Spectral type B6 V[5] or B5 IV/V[6]
U−B Template:Engvar −0.51[3]
B−V Template:Engvar −0.14[3]
Variable type α2 CVn[7]
Astrometry
Radial velocity (Rv)Template:Val[8] km/s
Proper motion (μ) RA: −39.290 mas/yr[2]
Dec.: −23.582 mas/yr[2]
Parallax (π)8.8899±0.1477 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−0.38[9]
Details
MassTemplate:Val[4] Template:Solar mass
Radius3.00[10] Template:Solar radius
Luminosity330[4] Template:Solar luminosity
Surface gravity (log g)4.21[11] cgs
Temperature13,870[4] K
Metallicity [Fe/H]0.19[11] dex
Rotational velocity (v sin i)Template:Val[11] km/s
Age216[12] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[13]
Database references
SIMBADdata

Script error: No such module "Check for unknown parameters".

Beta Sextantis, Latinized from β Sextantis, is a variable star in the equatorial constellation of Sextans. With an apparent visual magnitude of 5.07,[3] it is faintly visible to the naked eye on a dark night. According to the Bortle scale, it can be viewed from brighter lit suburban skies. The distance to this star, based upon an annual parallax shift of 8.89 mas,[2] is around 367 light years.

This star served as a primary standard in the MK spectral classification system with a stellar classification of B6 V,[5] indicating that it is a B-type main sequence star. However, Houk and Swift (1999) list a classification of B5 IV/V, suggesting it may be transitioning into a subgiant star.[6] Stellar evolution models support this is a main sequence star.[4] It has served as a uvby photometric standard, but is also categorized as an Alpha2 Canum Venaticorum variable[7] with a suspected period of 15.4 days. This lengthy a period conflicts with a relatively high projected rotational velocity of 85 km/s, leaving the explanation for the variance unresolved.[11][5]

References

Template:Reflist

Template:Stars of Sextans Template:Sky

  1. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named MAST
  2. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named GaiaDR3
  3. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Crawford1971
  4. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named zorec2012
  5. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Mathys1986
  6. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named houk1999
  7. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Kholopov1989
  8. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named deBruijne2012
  9. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named XHIP
  10. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named tycho-gaia
  11. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Hempel2003
  12. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named gontcharov2012
  13. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
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