View source for HD 30479

{{Short description|Star in the constellation Mensa}}
{{Starbox begin
| name = [[Henry Draper Catalogue|HD]] 30479
}}
{{Starbox observe
| epoch = J2000
| constell = [[Mensa (constellation)|Mensa]]
| ra = {{RA|04|38|21.7254}}<ref name = GaiaEDR3/>
| dec = {{DEC|-77|39|21.6185}}<ref name = GaiaEDR3/>
| appmag_v = 6.04 ± 0.01<ref name = Tycho2000/>
}}
{{Starbox character
| class = K2 III<ref name = Houk1975/>
| b-v = +1.10<ref name = Johnson1966/>
| u-b = +0.95<ref name = Johnson1966/>
}}
{{Starbox astrometry
| radial_v = 10.3 ± 0.1<ref name = GaiaDR2/>
| parallax = 6.0377
| p_error = 0.0223
| parallax_footnote = <ref name = GaiaEDR3/>
| prop_mo_ra = −6.975<ref name = GaiaEDR3/>
| prop_mo_dec = −11.166<ref name = GaiaEDR3/>
| absmag_v = −0.05
}}
{{Starbox detail
| mass = 1.28<ref name = Anders2019/>
| radius = 17.99<ref name = Lang2006/>
| luminosity = 116<ref name = McDonald2017/>
| temperature = 4,390<ref name = Lafrasse2010/>
| gravity = 2<ref name = Lafrasse2010/>
| metal_fe = −0.15<ref name =Eggen1994/>
| age_gyr =
| rotational_velocity = <1<ref name = DeMederios2014/>
}}
{{Starbox catalog
| names = {{odlist|Gould = 13 G. Mensae|HD = 30479|CPD = −77°181|FK5 = 2350|GC = 5750|HIP = 21611|HR = 1531|SAO = 256116}}
}}
{{Starbox reference
| Simbad = HR+1531
}}
{{Starbox end}}
'''HD 30479''' ('''HR 1531''') is a solitary star in the southern [[circumpolar constellation]] [[Mensa (constellation)|Mensa]]. It has an [[apparent magnitude]] of 6.04,<ref name = Tycho2000/> making it barely visible to the [[naked eye]] even under ideal conditions. It is located at a distance of 540 [[light years]]<ref name = GaiaEDR3/> but is receding with a heliocentric [[radial velocity]] of {{val|10.3|ul=km/s}}.<ref name = GaiaDR2/>
HD 30479 has a [[stellar classification]] of K2 III,<ref name = Houk1975/> indicating that it is an early [[stellar classification|K-type]] [[giant star]] and has an [[angular diameter]] of {{val|1.01|0.07|ul=mas}}<ref name = Lafrasse2010/> (after [[limb darkening]] correction). This yields a radius 17.99<ref name = Lang2006/> times that of the [[Sun]] at its estimated distance. At present it has 1.28<ref name = Anders2019/> times the [[mass of the Sun]] and radiates at 116<ref name = McDonald2017/> times the [[luminosity of the Sun]] at an [[effective temperature]] of 4,390<ref name = Lafrasse2010/> [[Kelvin|K]] from its enlarged photosphere, which gives it an orange glow. HD 30479 is believed to be one of the metal-deficient members of the young disk population<ref name =Eggen1994/> with an iron abundance of 71%<ref name =Eggen1994/> that of the [[Sun]]. Currently, it spins leisurely with a [[projected rotational velocity]] less than {{val|1|ul=km/s}},<ref name = DeMederios2014/> common for giants.
== References ==
{{reflist||refs=
<ref name = GaiaEDR3>{{Cite Gaia EDR3|4624582332045559808}}</ref>
<ref name = Tycho2000>{{cite journal |last1=Høg |first1=E. |last2=Fabricius |first2=C. |last3=Makarov |first3=V. V. |last4=Urban |first4=S. |last5=Corbin |first5=T. |last6=Wycoff |first6=G. |last7=Bastian |first7=U. |last8=Schwekendiek |first8=P. |last9=Wicenec |first9=A. |title=The Tycho-2 catalogue of the 2.5 million brightest stars |journal=Astronomy and Astrophysics |date=March 2000 |volume=355 |pages=L27–L30 |issn=0004-6361 |bibcode=2000A&A...355L..27H}}</ref>
<ref name = Houk1975>{{cite book|last1=Houk |first1=N. |last2=Cowley |first2=A. P. |title=University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. |date=1975 |bibcode=1975mcts.book.....H }}</ref>
<ref name = Johnson1966>{{cite journal |last1=Johnson |first1=H. L. |last2=Mitchell |first2=R. I. |last3=Iriarte |first3=B. |last4=Wisniewski |first4=W. Z. |title=UBVRIJKL Photometry of the Bright Stars |journal=Communications of the Lunar and Planetary Laboratory |date=1966 |volume=4 |pages=99–110 |bibcode=1966CoLPL...4...99J}}</ref>
<ref name = GaiaDR2>{{Cite DR2|4624582332045559808}}</ref>
<ref name = Eggen1994>{{cite journal |last1=Eggen |first1=O. J. |title=Evolved GK stars near the Sun. 2: The young disk population |journal=The Astronomical Journal |date=February 1994 |volume=107 |pages=594 |doi=10.1086/116879 |issn=0004-6256 |bibcode=1994AJ....107..594E |doi-access=free}}</ref>
<ref name = Lafrasse2010>{{cite book |last1=Lafrasse |first1=Sylvain |last2=Mella |first2=Guillaume |last3=Bonneau |first3=Daniel |last4=Duvert |first4=Gilles |last5=Delfosse |first5=Xavier |last6=Chesneau |first6=Olivier |last7=Chelli |first7=Alain |title=Optical and Infrared Interferometry II |chapter=Building the 'JMMC Stellar Diameters Catalog' using SearchCal |date=16 July 2010 |volume=7734 |pages=77344E |doi=10.1117/12.857024 |bibcode=2010SPIE.7734E..4EL |arxiv=1009.0137|s2cid=32097037 }}</ref>
<ref name = McDonald2017>{{cite journal |bibcode=2017MNRAS.471..770M |title=Fundamental parameters and infrared excesses of Tycho-Gaia stars |last1=McDonald |first1=I. |last2=Zijlstra |first2=A. A. |last3=Watson |first3=R. A. |journal=Monthly Notices of the Royal Astronomical Society |year=2017 |volume=471 |issue=1 |page=770 |doi=10.1093/mnras/stx1433 |arxiv=1706.02208 |doi-access=free}}</ref>
<ref name = Anders2019>{{cite journal |display-authors=1 |last1=Anders |first1=F. |last2=Khalatyan |first2=A. |last3=Chiappini |first3=C. |last4=Queiroz |first4=A. B. |last5=Santiago |first5=B. X. |last6=Jordi |first6=C. |last7=Girardi |first7=L. |last8=Brown |first8=A. G. A. |last9=Matijevic |first9=G. |last10=Monari |first10=G. |last11=Cantat-Gaudin |first11=T. |last12=Weiler |first12=M. |last13=Khan |first13=S. |last14=Miglio |first14=A. |last15=Carrillo |first15=I. |last16=Romero-Gómez |first16=M. |last17=Minchev |first17=I. |last18=de Jong |first18=R. S. |last19=Antoja |first19=T. |last20=Ramos |first20=P. |last21=Steinmetz |first21=M. |last22=Enke |first22=H. |title=Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18 |journal=Astronomy and Astrophysics |date=1 August 2019 |volume=628 |pages=A94 |doi=10.1051/0004-6361/201935765 |arxiv=1904.11302 |bibcode=2019A&A...628A..94A |s2cid=131780028 |issn=0004-6361 |doi-access=free}}</ref>
<ref name = Lang2006>{{cite book | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3 | publisher=[[Birkhäuser]] | year=2006 | isbn=3-540-29692-1 | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R<sub>*</sub>) is given by:
:<math>\begin{align} 2\cdot R_*
& = \frac{(165.6\cdot 1.01\cdot 10^{-3})\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
& \approx 35.98\cdot R_{\bigodot}
\end{align}</math></ref>
<ref name = DeMederios2014>{{cite journal |last1=De Medeiros |first1=J. R. |last2=Alves |first2=S. |last3=Udry |first3=S. |last4=Andersen |first4=J. |last5=Nordström |first5=B. |last6=Mayor |first6=M. |title=A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆ |journal=Astronomy & Astrophysics |date=January 2014 |volume=561 |pages=A126 |doi=10.1051/0004-6361/201220762 |issn=0004-6361 |bibcode=2014A&A...561A.126D |arxiv=1312.3474|doi-access=free}}</ref>
}}
{{Mensa (constellation)}}
[[Category:K-type giants]]
[[Category:Mensa (constellation)]]
[[Category:Durchmusterung objects]]
[[Category:Henry Draper Catalogue objects|030479]]
[[Category:Hipparcos objects|021611]]
[[Category:Bright Star Catalogue objects|1531]]
[[Category:Gould objects|Mensae, 13]]