{{short description|Star in the southern constellation of Lupus}} {{about-distinguish2|k Lupi|[[kappa Lupi|κ (kappa) Lupi]]}} {{Starbox begin}} {{Starbox image | image = {{Location mark |image=Lupus constellation map.svg|alt=|float=center|width=250 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=HD 137058 |x=442|y=582 }} | caption = Location of HD 137058 (circled in red) }} {{Starbox observe | epoch = J2000 | constell = [[Lupus (constellation)|Lupus]]<ref name=Anderson2012/> | ra = {{RA|15|25|20.20923}}<ref name=GaiaDR2/> | dec = {{DEC|−38|44|00.8803}}<ref name=GaiaDR2/> | appmag_v = 4.60<ref name=Anderson2012/> }} {{Starbox character | type = [[main sequence]]<ref name=patten1991/> | class = A0 V<ref name=houk1978/> | b-v = {{Val|0.000|0.015}}<ref name=Anderson2012/> }} {{Starbox astrometry | radial_v = {{Val|−3.0|2.8}}<ref name=deBruijne2012/> | prop_mo_ra = −41.573<ref name=GaiaDR2/> | prop_mo_dec = −24.603<ref name=GaiaDR2/> | parallax = 13.6178 | p_error = 0.4759 | parallax_footnote = <ref name=GaiaDR2/> | absmag_v = −0.76<ref name=Anderson2012/> }} {{Starbox detail | source = | mass = 2.4<ref name=tic/> | radius = 3.3<ref name=tic/> | luminosity = 72<ref name=tic/> | gravity = 3.78<ref name=tic/> | temperature = 9,283<ref name=tic/> | metal_fe = | rotational_velocity = 300.0<ref name=vanBelle2012/> | age_myr = 267<ref name=gontcharov2012/> }} {{Starbox catalog | names={{odlist | B=k Lup | CD=−38°10289 | HD=137058 | HIP=75501 | HR=5724 | SAO=206616 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = HD+137058 }} {{Starbox end}}
'''HD 137058''' is a [[star]] in the southern [[constellation]] of [[Lupus (constellation)|Lupus]]. Eggleton and Tokovinin (2008) list it as a single star,<ref name=Eggleton2008/> although Nitschelm and David (2011) suggested it may be a double-lined [[spectroscopic binary]].<ref name=Nitschelm2011/> Its [[apparent visual magnitude]] is 4.60,<ref name=Anderson2012/> making it bright enough to be visible to the naked eye. Based on an annual [[stellar parallax|parallax shift]] of {{Val|13.6|ul=mas}},<ref name=GaiaDR2/> it is located approximately 240 [[light year]]s away.
The [[stellar classification|primary component has a stellar classification]] of A0 V,<ref name=houk1978/> indicating it is an [[A-type main-sequence star]]. It rotates rapidly, with a [[projected rotational velocity]] of 300 km/s, resulting in an [[Oblate spheroid|oblate shape]] with an equatorial radius 22% larger than its polar radius.<ref name=vanBelle2012/> The star radiates 72 times the [[Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of {{val|fmt=commas|9283|ul=K}}.<ref name=tic/>
==References== <references>
<ref name=SIMBAD>{{cite simbad | title=HD 137058 | access-date=2018-07-29 }}</ref>
<ref name=GaiaDR2>{{cite DR2|6006429373106563712}}</ref>
<ref name=tic>{{cite journal |bibcode=2019AJ....158..138S |title=The Revised TESS Input Catalog and Candidate Target List |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=De Lee |first6=Nathan |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |journal=The Astronomical Journal |date=2019 |volume=158 |issue=4 |page=138 |doi=10.3847/1538-3881/ab3467 |doi-access=free |arxiv=1905.10694 |display-authors=1 }}</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=patten1991>{{cite journal |bibcode=1991AJ....102..323P |title=An IRAS Survey of Main-Sequence B,A, and F Stars |last1=Patten |first1=B. M. |last2=Willson |first2=L. A. |journal=The Astronomical Journal |date=1991 |volume=102 |page=323 |doi=10.1086/115879 }}</ref>
<ref name=houk1978>{{cite book | last1=Houk | first1=Nancy | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=2 | location=Ann Arbor | publisher=Dept. of Astronomy, University of Michigan | year=1978 | bibcode=1978mcts.book.....H }}</ref>
<ref name=deBruijne2012>{{cite journal | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C. | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project | journal=Astronomy & Astrophysics | volume=546 | id=A61 | pages=14 | date=October 2012 | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D | arxiv=1208.3048 | s2cid=59451347 }}</ref>
<ref name=vanBelle2012>{{cite journal | last1=van Belle | first1=Gerard T. | title=Interferometric observations of rapidly rotating stars | journal=The Astronomy and Astrophysics Review | volume=20 | issue=1 | page=51 | date=March 2012 | doi=10.1007/s00159-012-0051-2 | bibcode=2012A&ARv..20...51V | arxiv=1204.2572 | s2cid=119273474 }}</ref>
<ref name=Eggleton2008>{{cite journal | title=A catalogue of multiplicity among bright stellar systems | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869 | date=2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | arxiv=0806.2878 | bibcode=2008MNRAS.389..869E | s2cid=14878976 }}</ref>
<ref name=Nitschelm2011>{{cite journal |bibcode=2011ASPC..447...75N |title=An Investigation on Close Binaries in the Sco-Cen Complex |last1=Nitschelm |first1=C. |last2=David |first2=M. |journal=Evolution of Compact Binaries |date=2011 |volume=447 |page=75 }}</ref>
<ref name=Anderson2012>{{cite XHIP|75501}}</ref>
</references>
{{Stars of Lupus}}
[[Category:A-type main-sequence stars]] [[Category:Lupus (constellation)]] [[Category:Bayer objects|Lupi, k]] [[Category:Durchmusterung objects|CD-38 10289]] [[Category:Henry Draper Catalogue objects|137058]] [[Category:Hipparcos objects|075501]] [[Category:Bright Star Catalogue objects|5724]]