Lambda2 Sculptoris: Difference between revisions

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Update stellar parameters, Gaia DR3 astrometry
 
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  | equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
  | equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
  | constell = [[Sculptor (constellation)|Sculptor]]
  | constell = [[Sculptor (constellation)|Sculptor]]
  | ra = {{RA|00|44|12.09871}}<ref name=vanLeeuwen2007/>
  | ra = {{RA|00|44|12.09903}}<ref name=DR3/>
  | dec = {{DEC|−38|25|18.0704}}<ref name=vanLeeuwen2007/>
  | dec = {{DEC|−38|25|18.0542}}<ref name=DR3/>
  | appmag_v = +5.90<ref name=Evans1966/>
  | appmag_v = +5.90<ref name=Evans1966/>
}}
}}
{{Starbox character
{{Starbox character
  | type = [[red clump]]<ref name=Liu2007/>
  | type = [[Horizontal branch]]<ref name=gallenne2018/> <!-- = Horizontal branch -->
  | class = K1&nbsp;III<ref name=houk1979/>
  | class = K1&nbsp;III<ref name=houk1979/>
  | b-v = +1.15<ref name=Evans1966/>
  | b-v = +1.15<ref name=Evans1966/>
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}}
}}
{{Starbox astrometry
{{Starbox astrometry
  | radial_v = +26.5<ref name=Luck2015/>
  | radial_v = {{Val|+28.22|0.13}}<ref name=DR3/>
  | prop_mo_ra = +246.29<ref name=vanLeeuwen2007/>
  | prop_mo_ra = +245.567
  | prop_mo_dec = +120.53<ref name=vanLeeuwen2007/>
  | prop_mo_dec = +119.038
  | parallax = 9.63
| pm_footnote = <ref name=DR3/>
  | p_error = 0.40
  | parallax = 9.8530
  | parallax_footnote = <ref name=vanLeeuwen2007/>
  | p_error = 0.0458
  | parallax_footnote = <ref name=DR3/>
  | absmag_v = +0.82<ref name=Anderson2012/>
  | absmag_v = +0.82<ref name=Anderson2012/>
}}
}}
{{Starbox detail
{{Starbox detail
  | source =  
  | source = <ref name="Soubiran2024"/>
  | mass = 1.49<ref name=Luck2015/>
  | mass = {{Val|1.26|0.09}} or {{Val|1.12|0.06}}<ref name=gallenne2018/>
  | radius = 14<ref name=PasinettiFracassini2001/>
  | radius = {{Val|12.01|0.14}}
  | luminosity = 63<ref name=Luck2015/>
  | luminosity = {{Val|56.7|1.4}}
  | temperature = {{Val|4531|25|fmt=commas}}<ref name=Luck2015/>
  | temperature = {{Val|4572|35|fmt=commas}}
  | gravity =  
  | gravity = {{Val|2.34|0.10}}
  | metal_fe = {{Val|−0.04|0.05}}<ref name=Anderson2012/>
  | metal_fe = {{Val|+0.01|0.08}}
  | rotational_velocity =  
  | rotational_velocity =  
  | age_gyr = 3.58<ref name=Luck2015/>
  | age_gyr = {{Val|4.64|1.01}} or {{Val|6.50|1.22}}<ref name=gallenne2018/>
}}
}}
{{Starbox catalog
{{Starbox catalog
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}}
}}
{{Starbox end}}
{{Starbox end}}
'''Lambda<sup>2</sup> Sculptoris''' is an orange-hued [[star]] in the [[Southern celestial hemisphere|southern]] [[constellation]] of [[Sculptor (constellation)|Sculptor]]. On dark nights it is faintly visible to the naked eye, having an [[apparent visual magnitude]] of +5.90.<ref name=Evans1966/> Based upon an annual [[stellar parallax|parallax shift]] of 9.63&nbsp;[[milliarcsecond|mas]] as measured from Earth,<ref name=vanLeeuwen2007/> it is located roughly 340&nbsp;[[light-year]]s from the [[Sun]]. It has a relatively large [[proper motion]], advancing {{Val|0.284|0.015|u=[[arcsecond]]}} per year across the sky.<ref name=Wroblewski2001/>
'''Lambda<sup>2</sup> Sculptoris''' is an orange-hued [[star]] in the [[Southern celestial hemisphere|southern]] [[constellation]] of [[Sculptor (constellation)|Sculptor]]. On dark nights it is faintly visible to the naked eye, having an [[apparent visual magnitude]] of +5.90.<ref name=Evans1966/> Based upon an annual [[stellar parallax|parallax shift]] of 9.63&nbsp;[[milliarcsecond|mas]] as measured from Earth, it is located at a distance of 331&nbsp;[[light-year]]s.<ref name=DR3/> It has a relatively large [[proper motion]], advancing {{Val|0.273|u=[[arcsecond]]}} per year across the sky.<ref name=DR3/>


At an age of about 3.58<ref name=Luck2015/> billion years, Lambda<sup>2</sup> Sculptoris is an [[stellar evolution|evolved]] [[red clump|red-clump]]<ref name=Liu2007/> [[giant star]] with a [[stellar classification]] of K0&nbsp;III.<ref name=houk1979/> It is presently on the [[horizontal branch]] and is generating energy through the nuclear fusion of helium at its core. The star has an estimated 1.49<ref name=Luck2015/> times the [[mass of the Sun]] and has expanded to about 14<ref name=PasinettiFracassini2001/> times the [[Sun's radius]]. It is radiating 63<ref name=Luck2015/> times the [[solar luminosity]] from its [[photosphere]] at an [[effective temperature]] of {{val|4531|fmt=commas|ul=K}}.<ref name=Luck2015/>
The [[stellar spectrum|spectrum]] of this star matches a [[spectral class]] of K1III,<ref name=houk1979/> with the [[luminosity class]] III indicating it is a [[giant star]] that has exhausted the [[hydrogen]] at its [[stellar core|core]]. It is now fusing [[helium]], being in the [[stellar evolution|evolutionary stage]] known as the [[horizontal branch]].<ref name=gallenne2018/> Estimates of its mass and age give two different values: 1.12 or 1.26 [[solar mass]]es and 4.64 or 6.50 billion years.<ref name=gallenne2018/> It has expanded to 12.01 times the [[Sun's radius]] and radiates 56.7 times the [[solar luminosity]] from its [[photosphere]] at an [[effective temperature]] of {{val|4572|fmt=commas|ul=K}}.<ref name="Soubiran2024"/>


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


<ref name=vanLeeuwen2007>{{citation
<ref name=DR3>{{cite DR3|5000702410680381824}}</ref>
| title=Validation of the new Hipparcos reduction
| last1=van Leeuwen | first1=F.
| journal=Astronomy and Astrophysics
| volume=474 | issue=2 | pages=653–664 | date=2007
| arxiv=0708.1752 | bibcode=2007A&A...474..653V
| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}</ref>


<ref name=Anderson2012>{{citation
<ref name=Anderson2012>{{citation
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  | arxiv=1108.4971 | s2cid=119257644 | postscript=. }}</ref>
  | arxiv=1108.4971 | s2cid=119257644 | postscript=. }}</ref>


<ref name=Wroblewski2001>{{citation
<ref name=gallenne2018>{{Citation |last1=Gallenne |first1=A. |last2=Pietrzyński |first2=G. |last3=Graczyk |first3=D. |last4=Nardetto |first4=N. |last5=Mérand |first5=A. |last6=Kervella |first6=P. |last7=Gieren |first7=W. |last8=Villanova |first8=S. |last9=Mennickent |first9=R. E. |last10=Pilecki |first10=B. |date=2018-08-01 |title=Fundamental properties of red-clump stars from long-baseline H-band interferometry |journal=[[Astronomy & Astrophysics]] |arxiv=1806.09572 |language=en |volume=616 |pages=A68 |doi=10.1051/0004-6361/201833341 |bibcode=2018A&A...616A..68G |issn=0004-6361 |postscript=.}}</ref>
| title=High proper motion stars with declinations between -30° and -40°, and right ascensions between 00 h and 10 h 40 m
| last1=Wroblewski | first1=H. | last2=Costa | first2=E.
| journal=Astronomy and Astrophysics | postscript=.
| volume=367 | pages=725–728 | date=February 2001
| doi=10.1051/0004-6361:20000062 | bibcode=2001A&A...367..725W | url=http://repositorio.uchile.cl/bitstream/2250/125868/1/Wroblewski_H.pdf| doi-access=free }}</ref>


<ref name=PasinettiFracassini2001>{{citation | display-authors=1
<ref name="Soubiran2024">{{Citation | display-authors=1 |last1=Soubiran |first1=C. |last2=Creevey |first2=O. L. |last3=Lagarde |first3=N. |last4=Brouillet |first4=N. |last5=Jofré |first5=P. |last6=Casamiquela |first6=L. |last7=Heiter |first7=U. |last8=Aguilera-Gómez |first8=C. |last9=Vitali |first9=S. |last10=Worley |first10=C. |last11=de Brito Silva |first11=D. |date=2024-02-01 |title=Gaia FGK benchmark stars: Fundamental Teff and log g of the third version |bibcode=2024A&A...682A.145S |journal=Astronomy and Astrophysics |volume=682 |pages=A145 |doi=10.1051/0004-6361/202347136 |arxiv=2310.11302 |issn=0004-6361 |postscript=.}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A%2BA/682/A145&HIP=HIP3456 Lam2 Scl's database entry] at [[VizieR]].</ref>
| 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
| volume=367 | pages=521–24 | date=February 2001
| doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P
| arxiv=astro-ph/0012289 | s2cid=425754 | postscript=. }}</ref>
 
<ref name=Liu2007>{{citation | postscript=.
| display-authors=1 | last1=Liu | first1=Y. J.
| last2=Zhao | first2=G. | last3=Shi | first3=J. R.
| last4=Pietrzyński | first4=G. | last5=Gieren | first5=W.
| title=The abundances of nearby red clump giants
| journal=Monthly Notices of the Royal Astronomical Society
| volume=382 | issue=2 | pages=553–66 | date=2007
| bibcode=2007MNRAS.382..553L | doi=10.1111/j.1365-2966.2007.11852.x | doi-access=free }}</ref>
 
<ref name=Luck2015>{{citation
| title=Abundances in the Local Region. I. G and K Giants
| last1=Luck | first1=R. Earle
| journal=Astronomical Journal | postscript=.
| volume=150 | issue=3 | at=88 | year=2015
| bibcode=2015AJ....150...88L | doi=10.1088/0004-6256/150/3/88 |arxiv = 1507.01466 | s2cid=118505114 }}</ref>


<ref name=houk1979>{{citation
<ref name=houk1979>{{citation

Latest revision as of 18:42, 20 June 2025

Template:Short description Script error: No such module "For".

Lambda2 Sculptoris
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Sculptor
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +5.90[2]
Characteristics
Evolutionary stage Horizontal branch[3]
Spectral type K1 III[4]
B−V Template:Engvar +1.15[2]
Astrometry
Radial velocity (Rv)Template:Val[1] km/s
Proper motion (μ) RA: +245.567 mas/yr[1]
Dec.: +119.038 mas/yr[1]
Parallax (π)9.8530±0.0458 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.82[5]
Details[6]
MassTemplate:Val or Template:Val[3] Template:Solar mass
RadiusTemplate:Val Template:Solar radius
LuminosityTemplate:Val Template:Solar luminosity
Surface gravity (log g)Template:Val cgs
TemperatureTemplate:Val K
Metallicity [Fe/H]Template:Val dex
AgeTemplate:Val or Template:Val[3] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[7]
Database references
SIMBADdata

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Lambda2 Sculptoris is an orange-hued star in the southern constellation of Sculptor. On dark nights it is faintly visible to the naked eye, having an apparent visual magnitude of +5.90.[2] Based upon an annual parallax shift of 9.63 mas as measured from Earth, it is located at a distance of 331 light-years.[1] It has a relatively large proper motion, advancing Template:Val per year across the sky.[1]

The spectrum of this star matches a spectral class of K1III,[4] with the luminosity class III indicating it is a giant star that has exhausted the hydrogen at its core. It is now fusing helium, being in the evolutionary stage known as the horizontal branch.[3] Estimates of its mass and age give two different values: 1.12 or 1.26 solar masses and 4.64 or 6.50 billion years.[3] It has expanded to 12.01 times the Sun's radius and radiates 56.7 times the solar luminosity from its photosphere at an effective temperature of Template:Val.[6]

References

Template:Reflist

Template:Stars of Sculptor

  1. ↑ a b c d e f g Cite error: Invalid <ref> tag; no text was provided for refs named DR3
  2. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Evans1966
  3. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named gallenne2018
  4. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named houk1979
  5. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  6. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Soubiran2024
  7. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
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