{{Short description|Star in the constellation Lupus}} {{DISPLAYTITLE:Nu<sup>1</sup> Lupi}} {{Starbox begin | name = Nu<sup>1</sup> Lupi }} {{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=Nu1 Lupi |x=470|y=945 }} | caption = Location of ν<sup>1</sup> Lupi (circled in red) }} {{Starbox observe | epoch = [[J2000.0]] | equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]]) | constell = [[Lupus (constellation)|Lupus]] | ra = {{RA|15|22|08.27124}}<ref name=vanLeeuwen2007/> | dec = {{DEC|−47|55|40.0543}}<ref name=vanLeeuwen2007/> | appmag_v = 5.01<ref name=Mermilliod1986/> }} {{Starbox character | class = F6 III-IV<ref name=Gray2006/> | b-v = +0.50<ref name=Mermilliod1986/> | u-b = +0.04<ref name=Mermilliod1986/> | r-i = | variable = }} {{Starbox astrometry | radial_v = | prop_mo_ra = −141.19<ref name=vanLeeuwen2007/> | prop_mo_dec = −132.92<ref name=vanLeeuwen2007/> | parallax = 27.89 | p_error = 0.33 | parallax_footnote = <ref name=vanLeeuwen2007/> | absmag_v = +2.32<ref name=AmmlerVonEiff2012/> }} {{Starbox detail | source = | mass = 1.67<ref name=Bensby2014/> | radius = | luminosity = | temperature = {{Val|6447|80|fmt=commas}}<ref name=Bensby2014/> | gravity = {{Val|3.87|0.10}}<ref name=Bensby2014/> | metal_fe = {{Val|0.17|0.05}}<ref name=Bensby2014/> | rotational_velocity = {{Val|2.8|0.2}}<ref name=AmmlerVonEiff2012/> | age_gyr = 2.0<ref name=Bensby2014/> }} {{Starbox catalog | names = [[Bayer designation|ν<sup>1</sup> Lup]], [[Durchmusterung|CD]]−47°9922, [[FK5]] 3211, [[Henry Draper Catalogue|HD]] 136351, [[Hipparcos Catalogue|HIP]] 75206, [[Harvard Revised catalogue|HR]] 5698, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 225703<ref name=SIMBAD/> }} {{Starbox reference | Simbad = nu01+Lup }} {{Starbox end}} '''Nu<sup>1</sup> Lupi''' ('''ν<sup>1</sup> Lup''') is a solitary<ref name=Eggleton2008/> [[star]] in the southern [[constellation]] of [[Lupus (constellation)|Lupus]]. It is visible to the naked eye with an [[apparent visual magnitude]] of 5.01.<ref name=Mermilliod1986/> It is a high [[proper motion]] star<ref name=Haakonsen2009/> with an annual [[stellar parallax|parallax shift]] of 27.89<ref name=vanLeeuwen2007/> [[milliarcsecond|mas]] as seen from Earth, yielding a distance estimate of 117 [[light year]]s from the [[Sun]].
This is a two<ref name=Bensby2014/> billion year old [[stellar evolution|evolved]] star with a [[stellar classification]] of F6 III-IV,<ref name=Gray2006/> indicating that the [[spectrum]] has characteristics intermediate between a [[subgiant star|subgiant]] and [[giant star]]. It is most likely the source of [[X-ray astronomy|X-ray emission]]<ref name=Haakonsen2009/> detected at these coordinates with a luminosity of {{Val|1.09e29|u=erg s<sup>−1</sup>}}.<ref name=Pizzolato2000/> The star has an estimated 1.67<ref name=Bensby2014/> times the [[solar mass|mass of the Sun]] and is spinning slowly with a [[projected rotational velocity]] of 2.8 km/s.<ref name=AmmlerVonEiff2012/>
==See also== * [[Nu2 Lupi|Nu<sup>2</sup> Lupi]]
==References== <references>
<ref name=vanLeeuwen2007>{{citation | 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=Pizzolato2000>{{citation | display-authors=1 | last1=Pizzolato | first1=N. | last2=Maggio | first2=A. | last3=Sciortino | first3=S. | title=Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases | journal=Astronomy and Astrophysics | volume=361 | pages=614–628 | date=September 2000 | bibcode=2000A&A...361..614P | postscript=. }}</ref>
<ref name=Haakonsen2009>{{citation | last1=Haakonsen | first1=Christian Bernt | last2=Rutledge | first2=Robert E. | title=XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources | journal=The Astrophysical Journal Supplement |volume=184 | issue=1 | pages=138–151 | date=September 2009 | doi=10.1088/0067-0049/184/1/138 | bibcode=2009ApJS..184..138H | arxiv=0910.3229 | s2cid=119267456 | postscript=. }}</ref>
<ref name=AmmlerVonEiff2012>{{citation | last1=Ammler-von Eiff | first1=Matthias | last2=Reiners | first2=Ansgar | title=New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? | journal=Astronomy & Astrophysics | arxiv=1204.2459 | volume=542 | page=A116 | date=June 2012 | postscript=. | doi=10.1051/0004-6361/201118724 | bibcode=2012A&A...542A.116A | s2cid=53666672 }}</ref>
<ref name=Eggleton2008>{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 | postscript=. }}</ref>
<ref name=Bensby2014>{{citation | display-authors=1 | last1=Bensby | first1=T. | last2=Feltzing | first2=S. | last3=Oey | first3=M. S. | title=Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the solar neighbourhood | journal=Astronomy & Astrophysics | volume=562 | issue=A71 | pages=28 | date=2014 | doi=10.1051/0004-6361/201322631 | bibcode=2014A&A...562A..71B | arxiv=1309.2631 | s2cid=118786105 | postscript=. }}</ref>
<ref name=Gray2006>{{citation | display-authors=1 | last1=Gray | first1=R. O. | last2=Corbally | first2=C. J. | last3=Garrison | first3=R. F. | last4=McFadden | first4=M. T. | last5=Bubar | first5=E. J. | last6=McGahee | first6=C. E. | last7=O'Donoghue | first7=A. A. | last8=Knox | first8=E. R. | title=Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample | journal=[[The Astronomical Journal]] | volume=132 | issue=1 | pages=161–70 | date=2006 | doi=10.1086/504637 | bibcode=2006AJ....132..161G | arxiv=astro-ph/0603770 | s2cid=119476992 | postscript=. }}</ref>
<ref name=Mermilliod1986>{{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data | year=1986 | publisher=[[SIMBAD]] | bibcode=1986EgUBV........0M | postscript=. }}</ref>
<ref name=SIMBAD>{{cite simbad | title=* nu.01 Lup | access-date=2017-03-08 | postscript=. }}</ref>
</references>
{{Stars of Lupus|state=collapsed}}
[[Category:F-type subgiants]] [[Category:F-type giants]] [[Category:Lupus (constellation)]] [[Category:Bayer objects|Lupi, Nu1]] [[Category:Gliese and GJ objects|3901]] [[Category:Henry Draper Catalogue objects|136351]] [[Category:Hipparcos objects|075206]] [[Category:Bright Star Catalogue objects|5698]] [[Category:Durchmusterung objects|CD-47 09922]]