HD 101930

{{Short description|Star in the constellation Centaurus}} {{Starbox begin | name = [[Henry Draper catalogue|HD]] 101930 }} {{Starbox observe | epoch = J2000 | constell = [[Centaurus]]<ref name = Anderson2012/> | ra = {{RA|11|43|30.11338}}<ref name = GaiaDR3/> | dec = {{DEC|-58|00|24.7787}}<ref name = GaiaDR3/> | appmag_v = 8.21<ref name = Anderson2012/> }} {{Starbox character | type = [[main sequence]]<ref name=onehag2012/> | class = K2 V+<ref name = Gray2006/> | b-v = +0.91<ref name = Cousins1963/> }} {{Starbox astrometry | radial_v = +18.36<ref name="Lovis2005"/> | prop_mo_ra = +16.680 | prop_mo_dec = +349.125 | pm_footnote = <ref name = GaiaDR3/> | parallax = 33.3814 | p_error = 0.0180 | parallax_footnote = <ref name = GaiaDR3/> | absmag_v = +5.88<ref name = Anderson2012/> }} {{Starbox detail | radius = 0.87{{±|0.05|0.04}}<ref name = Stassun2019/> | luminosity = 0.43{{±|0.01}}<ref name="Bonfanti2015"/> | gravity = 4.40{{±|0.11}}<ref name = Sousa2008/> | temperature = 5,079{{±|62}}<ref name="Lovis2005"/> | metal_fe = +0.1{{±|0.03}}<ref name = Tsantaki2014/> | rotational_velocity = 2<ref name = LDA2021/> | age_gyr = 5.4{{±|4.4}}<ref name="Bonfanti2015"/> }} {{Starbox catalog | names = [[Durchmusterung|CD]]−57°4096, [[Gliese Catalogue of Nearby Stars|GJ]] 3683, [[Hipparcos#Published catalogues|HIP]] 57172, [[Star catalogue#Proper motion catalogues|LTT]] 4350, [[Star catalogue#Proper motion catalogues|NLTT]] 28356, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 239322<ref name = SIMBAD/> }} {{Starbox reference | Simbad = HD+101930 | ARICNS = 04014 | EPE = HD+101930 }} {{Starbox end}}

'''HD 101930''', also known as '''GJ 3683''', is an orange hued [[star]] with an orbiting [[exoplanet]] located in the southern [[constellation]] [[Centaurus]]. It has an [[apparent magnitude]] of 8.21,<ref name = Anderson2012/> making it faintly visible in [[binoculars]] but not to the [[naked eye]]. The system is located relatively close at a distance of 98 [[light year]]s<ref name = GaiaDR3/> but is receding with a heliocentric [[radial velocity]] of {{val|18.4|ul=km/s}}.<ref name="Lovis2005"/> It has a relatively large [[proper motion]], traversing the [[celestial sphere]] with an [[angular velocity]] of {{val|0.320|ul=arcsecond}}·yr<sup>−1</sup>.<ref name=Luyten_1979/>

==Description== HD 101930 has a [[stellar classification]] of K2 V+,<ref name = Gray2006/> indicating that it is an ordinary [[K-type main-sequence star]]. It has an estimated age of 5.4 [[billion years]],<ref name="Bonfanti2015"/> which is slightly older than the [[Sun]]. The object has 87% the [[radius of the Sun]]<ref name = Stassun2019/> and an [[effective temperature]] of {{val|5079|ul=K|fmt=commas}}.<ref name="Lovis2005"/> When combined, these parameters yield a [[luminosity]] 43% that of the [[Sun]] from its [[photosphere]].<ref name="Bonfanti2015"/> As expected with planetary hosts, HD 101930 is metal enriched, having a [[metallicity]] 26% above solar levels.<ref name = Tsantaki2014/> The star's [[projected rotational velocity]] is similar to the Sun's, having a value of {{val|2|ul=km/s}}.<ref name = LDA2021/>

A 2007 multicity survey found a co-moving companion located {{val|73|ul=arcsecond}} away,<ref name = Mugrauer2007/> making it a [[binary star]]. It has a class of M0-1<ref name = Lindgren2016/> and a [[mass]] of {{solar mass|0.7|link=y}}.<ref name = Mugrauer2007/>

==Planetary system== In 2005, the discovery of an exoplanet orbiting the star was announced. This is another discovery using the [[radial velocity method]] with the [[HARPS spectrograph]]. As the [[inclination]] of the [[orbital plane]] is unknown, only a lower bound on the mass can be determined. It has at least 30% of the [[mass of Jupiter]].<ref name="Lovis2005"/>

{{OrbitboxPlanet begin | table_ref = <ref name="Lovis2005"/> }} {{OrbitboxPlanet | exoplanet = [[HD 101930 b|b]] | mass = ≥ 0.30 | period = 70.46 ± 0.18 | semimajor = 0.302 | eccentricity = 0.11 ± 0.02 }} {{Orbitbox end}}

== See also == * [[HD 93083]] * [[HD 102117]] * [[List of extrasolar planets]] * [[HARPS spectrograph]]

==References== <references> <ref name = GaiaDR3>{{Cite DR3|5341787994441794176}}</ref>

<ref name=onehag2012>{{cite journal |last1=Önehag |first1=A. |last2=Heiter |first2=U. |last3=Gustafsson |first3=B. |last4=Piskunov |first4=N. |last5=Plez |first5=B. |last6=Reiners |first6=A. |title=M-dwarf metallicities. A high-resolution spectroscopic study in the near infrared |journal=Astronomy and Astrophysics |date=2012 |volume=542 |pages=A33 |doi=10.1051/0004-6361/201118101 |arxiv=1112.0141 |bibcode=2012A&A...542A..33O }}</ref>

<ref name="Lovis2005">{{cite journal | last1 = Lovis | first1 = C. | last2 = Mayor | first2 = M. | last3 = Bouchy | first3 = F. | last4 = Pepe | first4 = F. | last5 = Queloz | first5 = D. | last6 = Santos | first6 = N. C. | last7 = Udry | first7 = S. | last8 = Benz | first8 = W. | last9 = Bertaux | first9 = J.-L. | last10 = Mordasini | first10 = C. | last11 = Sivan | first11 = J.-P. | title = The HARPS search for southern extra-solar planets | journal = Astronomy & Astrophysics | date = 30 June 2005 | volume = 437 | issue = 3 | pages = 1121–1126 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361:20052864 | bibcode = 2005A&A...437.1121L | arxiv = astro-ph/0503660 | s2cid = 119492030 | doi-access = free}}</ref>

<ref name = Gray2006>{{cite journal | 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 | date = 2 June 2006 | volume = 132 | issue = 1 | pages = 161–170 | issn = 0004-6256 | eissn = 1538-3881 | doi = 10.1086/504637 | bibcode = 2006AJ....132..161G | arxiv = astro-ph/0603770 | doi-access = free }}</ref>

<ref name = Cousins1963>{{cite book |last1=Cousins |first1=A. W. J. |last2=Stoy |first2=R. H. |title=Photoelectric magnitudes and colours of southern stars |year=1963 |bibcode=1963pmcs.book.....C}}</ref>

<ref name = Sousa2008>{{cite journal | last1 = Sousa | first1 = S. G. | last2 = Santos | first2 = N. C. | last3 = Mayor | first3 = M. | last4 = Udry | first4 = S. | last5 = Casagrande | first5 = L. | last6 = Israelian | first6 = G. | last7 = Pepe | first7 = F. | last8 = Queloz | first8 = D. | last9 = Monteiro | first9 = M. J. P. F. G. | title = Spectroscopic parameters for 451 stars in the HARPS GTO planet search program | journal = Astronomy & Astrophysics | date = 4 June 2008 | volume = 487 | issue = 1 | pages = 373–381 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361:200809698 | bibcode = 2008A&A...487..373S | arxiv = 0805.4826 | doi-access = free}}</ref>

<ref name = Tsantaki2014>{{cite journal | last1 = Tsantaki | first1 = M. | last2 = Sousa | first2 = S. G. | last3 = Santos | first3 = N. C. | last4 = Montalto | first4 = M. | last5 = Delgado-Mena | first5 = E. | last6 = Mortier | first6 = A. | last7 = Adibekyan | first7 = V. | last8 = Israelian | first8 = G. | title = Spectroscopic parameters for solar-type stars with moderate-to-high rotation | journal = Astronomy & Astrophysics | date = October 2014 | volume = 570 | page = A80 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/201424257 | bibcode = 2014A&A...570A..80T | arxiv = 1407.6765 | doi-access = free}}</ref>

<ref name="Bonfanti2015">{{cite journal | last1 = Bonfanti | first1 = A. | last2 = Ortolani | first2 = S. | last3 = Piotto | first3 = G. | last4 = Nascimbeni | first4 = V. | title = Revising the ages of planet-hosting stars | journal = Astronomy & Astrophysics | date = 12 February 2015 | volume = 575 | page = A18 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/201424951 | bibcode = 2015A&A...575A..18B | arxiv = 1411.4302 | doi-access = free | s2cid = 54555839}}</ref>

<ref name = Stassun2019>{{cite journal | display-authors = 1 | last1 = Stassun | first1 = Keivan G. | last2 = Oelkers | first2 = Ryan J. | last3 = Paegert | first3 = Martin | last4 = Torres | first4 = Guillermo | last5 = Pepper | first5 = Joshua | last6 = Lee | first6 = Nathan De | 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. | last31 = Sharma | first31 = Sanjib | last32 = Shiao | first32 = Bernie | last33 = Sozzetti | first33 = Alessandro | last34 = Stello | first34 = Dennis | last35 = Vanderspek | first35 = Roland | last36 = Wallace | first36 = Geoff | last37 = Winn | first37 = Joshua N. | title = The Revised ''TESS'' Input Catalog and Candidate Target List | journal = The Astronomical Journal | date = 9 September 2019 | volume = 158 | issue = 4 | page = 138 | eissn = 1538-3881 | doi = 10.3847/1538-3881/ab3467 | bibcode = 2019AJ....158..138S | arxiv = 1905.10694 | doi-access = free}}</ref>

<ref name = LDA2021>{{cite journal | last1 = Llorente de Andrés | first1 = F. | last2 = Chavero | first2 = C. | last3 = de la Reza | first3 = R. | last4 = Roca-Fàbrega | first4 = S. | last5 = Cifuentes | first5 = C. | title = The evolution of lithium in FGK dwarf stars | journal = Astronomy & Astrophysics | date = October 2021 | volume = 654 | page = A137 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/202141339 | bibcode = 2021A&A...654A.137L | arxiv = 2108.05852 | doi-access = free}}</ref>

<ref name = Mugrauer2007>{{cite journal | last1 = Mugrauer | first1 = M. | last2 = Seifahrt | first2 = A. | last3 = Neuhauser | first3 = R. | title = The multiplicity of planet host stars - new low-mass companions to planet host stars | journal = Monthly Notices of the Royal Astronomical Society | date = 11 July 2007 | volume = 378 | issue = 4 | pages = 1328–1334 | issn = 0035-8711 | eissn = 1365-2966 | doi = 10.1111/j.1365-2966.2007.11858.x | bibcode = 2007MNRAS.378.1328M | arxiv = 0704.1767 | doi-access = free}}</ref>

<ref name = Lindgren2016>{{cite journal | last1 = Lindgren | first1 = Sara | last2 = Heiter | first2 = Ulrike | last3 = Seifahrt | first3 = Andreas | title = Metallicity determination of M dwarfs | journal = Astronomy & Astrophysics | date = February 2016 | volume = 586 | page = A100 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/201526602 | bibcode = 2016A&A...586A.100L | arxiv = 1510.06642 | doi-access = free}}</ref>

<ref name = SIMBAD>{{Cite simbad|title = HD 101930|access-date = May 22, 2009}}</ref>

<ref name=Luyten_1979>{{cite journal | title=NLTT Catalogue (Luyten, 1979) | last=Luyten | first=W. J. | date=June 1995 | journal=VizieR On-line Data Catalog: I/98A. Originally Published in: 1979nltt.book.....L | bibcode=1995yCat.1098....0L }}</ref> </references>

== External links == * {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+101930 | title=HD 101930 | work=Exoplanets | access-date=2009-05-22 | archive-url=https://web.archive.org/web/20160303171249/https://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+101930 | archive-date=2016-03-03 | url-status=dead }}

{{DEFAULTSORT:HD 101930}} [[Category:K-type main-sequence stars]] [[Category:Planetary systems with one confirmed planet]] [[Category:Centaurus]] [[Category:Durchmusterung objects|CD−57 4096]] [[Category:Gliese and GJ objects|3683]] [[Category:Henry Draper Catalogue objects|101930]] [[Category:Hipparcos objects|057172]]