{{short description|Star in the constellation Libra}} {{Starbox begin}} {{Starbox observe | epoch = J2000 | constell = [[Libra (constellation)|Libra]]<ref name=Anderson2012/> | ra = {{RA|15|52|17.54740}}<ref name=GaiaDR3/> | dec = {{DEC|−18|26|09.8432}}<ref name=GaiaDR3/> | appmag_v = 7.25<ref name=Anderson2012/> }} {{Starbox character | type = [[main sequence]]<ref name=GaiaDR3/> | class = G1V<ref name=Gray2006/> | b-v = {{Val|+0.628|0.002}}<ref name=Anderson2012/> | u-b = | variable = }} {{Starbox astrometry | radial_v = {{val|−3.36|0.14}}<ref name=GaiaDR3/> | prop_mo_ra = +97.862 | prop_mo_dec = +22.363 | pm_footnote = <ref name=GaiaDR3/> | parallax = 30.5637 | p_error = 0.0898 | parallax_footnote = <ref name=GaiaDR3/> | absmag_v = 4.71<ref name=Anderson2012/> }} {{Starbox detail | source = | mass = 1.03<ref name=Earle2017/> | radius = 1.05<ref name=GaiaDR2/> | luminosity = {{Val|1.202|0.003}}<ref name=GaiaDR2/> | gravity = 4.44<ref name=Earle2017/> | temperature = {{Val|5890|15|30|fmt=commas}}<ref name=GaiaDR2/> | metal_fe = {{Val|+0.10|0.01}}<ref name=Anderson2012/> | rotational_velocity = 6.0<ref name=Anderson2012/> | age_gyr = 3.82<ref name=Earle2017/> }} {{Starbox catalog | names = {{odlist | BD=−17°4442 | HD=141937 | HIP=77740 | SAO=159551 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = HD+141937 | NSTED = HD-141937 }} {{End}}

'''HD 141937''' is a [[star]] in the southern [[zodiac]] [[constellation]] of [[Libra (constellation)|Libra]], positioned a couple of degrees to the north of [[Lambda Librae]]. It is a yellow-hued star with an [[apparent visual magnitude]] of 7.25,<ref name=Anderson2012/> which means it is too faint to be seen with the naked eye. This object is located at a distance of 106.7&nbsp;[[light-year]]s from the [[Sun]] based on [[stellar parallax|parallax]], but is drifting closer with a [[radial velocity]] of −3.4&nbsp;km/s.<ref name=GaiaDR3/> It has an [[absolute magnitude]] of 4.71.<ref name=Anderson2012/>

This is a [[G-type main-sequence star]] with a [[stellar classification]] of G1V.<ref name=Gray2006/> It is a [[solar-type star]] with slightly higher mass and radius compared to the Sun. The [[metallicity]] is higher than solar. It is an estimated 3.8<ref name=Earle2017/>&nbsp;billion years old and is spinning with a [[projected rotational velocity]] of 6&nbsp;km/s.<ref name=Mena2014/> The star is radiating 1.2 times the [[luminosity of the Sun]] from its [[photosphere]] at an [[effective temperature]] of 5,890&nbsp;K.<ref name=GaiaDR2/>

The star has a substellar companion (HD 141937 b), either a planet or a brown dwarf, announced in April 2001 by the [[European Southern Observatory]].<ref name="eso0114"/> It has a [[minimum mass]] of 9.7 {{Jupiter mass|link=y}}.<ref name=Udry2002/> In 2020, the [[orbital inclination|inclination]] of the orbit was measured via [[astrometry]], indicating a true mass of 27.4 {{Jupiter mass|link=y}}, which would make it a [[brown dwarf]].<ref name="Kiefer2020"/> However, a more recent astrometric study in 2026 found an edge-on orbit, indicating a planetary mass.<ref name=Piccinini2026/> A 662-day orbit places the [[orbital distance]] 1.5 times farther away from the [[star]] as [[Earth]] is from the [[Sun]], with a high [[eccentricity (orbit)|eccentricity]] of 0.46.<ref name=Piccinini2026/>

{{OrbitboxPlanet begin | table_ref = <ref name=Piccinini2026/> }} {{OrbitboxPlanet | exoplanet = b | mass = {{val|11.3|0.5}} | period = {{val|662.37|0.09}} | semimajor = {{val|1.54|0.02}} | eccentricity = {{val|0.460|0.004}} | inclination = {{val|90.00|6.75|6.76}} }} {{Orbitbox end}}

==See also== * [[HD 142022]] * [[HD 142415]] * [[List of extrasolar planets]]

==References== {{Reflist|refs=

<ref name="GaiaDR3">{{Cite Gaia DR3|6248534171318085376}}</ref>

<ref name="Anderson2012">{{cite XHIP|77740}}</ref>

<ref name="Earle2017">{{cite journal | title=Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants | last1=Luck | first1=R. Earle | journal=The Astronomical Journal | volume=153 | issue=1 | id=21 | pages=19 | date=January 2017 | bibcode=2017AJ....153...21L | arxiv=1611.02897 | doi=10.3847/1538-3881/153/1/21 | s2cid=119511744 | doi-access=free}}</ref>

<ref name="eso0114">{{cite press release | title=Exoplanets: The Hunt Continues! | publisher=European Southern Observatory | date=April 4, 2001 | location=Garching, Germany | url=http://www.eso.org/public/news/eso0114/ | access-date=December 29, 2012}}</ref>

<ref name="GaiaDR2">{{Cite Gaia DR2|6248534171318085376}}</ref>

<ref name="Gray2006">{{cite journal | display-authors=1 | last1=Gray | first1=R. O. | first2=C. J. | last2=Corbally | first3=R. F. | last3=Garrison | first4=M. T. | last4=McFadden | first5=P. E. | last5=Robinson | title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I | journal=The Astronomical Journal | volume=132 | issue=1 | pages=161–170 | date=July 2006 | doi=10.1086/504637 | arxiv=astro-ph/0603770 | bibcode=2006AJ....132..161G | s2cid=119476992}}</ref>

<ref name="Kiefer2020">{{cite journal | title=Determining the true mass of radial-velocity exoplanets with Gaia. Nine planet candidates in the brown dwarf or stellar regime and 27 confirmed planets | last1=Kiefer | first1=F. | last2=Hébrard | first2=G. | last3=Lecavelier des Etangs | first3=A. | last4=Martioli | first4=E. | last5=Dalal | first5=S. | last6=Vidal-Madjar | first6=A. | display-authors=1 | journal=Astronomy & Astrophysics | volume=645 | page=<!-- to prevent citation bot adding nonexistent page number--> | article-number=A7 | date=January 2021 | arxiv=2009.14164 | bibcode=2021A&A...645A...7K | bibcode-access=free | doi=10.1051/0004-6361/202039168 | doi-access=free | s2cid=221995447}}</ref>

<ref name="Mena2014">{{cite journal | title=Li depletion in solar analogues with exoplanets. Extending the sample | display-authors=1 | last1=Delgado Mena | first1=E. | last2=Israelian | first2=G. | last3=González Hernández | first3=J. I. | last4=Sousa | first4=S. G. | last5=Mortier | first5=A. | last6=Santos | first6=N. C. | last7=Adibekyan | first7=V. Zh. | last8=Fernandes | first8=J. | last9=Rebolo | first9=R. | last10=Udry | first10=S. | last11=Mayor | first11=M. | journal=Astronomy & Astrophysics | volume=562 | id=A92 | pages=17 | date=February 2014 | doi=10.1051/0004-6361/201321493 | arxiv=1311.6414 | bibcode=2014A&A...562A..92D | s2cid=56104807}}</ref>

<ref name="SIMBAD">{{cite simbad | title=HD 117207 | access-date=2018-07-23}}</ref>

<ref name="Udry2002">{{cite journal | url=http://www.aanda.org/articles/aa/full/2002/28/aa2416/aa2416.html | display-authors=1 | last1=Udry | first1=S. | last2=Mayor | first2=M. | last3=Naef | first3=D. | last4=Pepe | first4=F. | last5=Queloz | first5=D. | last6=Santos | first6=N. C. | last7=Burnet | first7=M. | title=The CORALIE survey for southern extra-solar planets VIII. The very low-mass companions of HD141937, HD162020, HD168443, HD202206: brown dwarfs or superplanets? | journal=[[Astronomy and Astrophysics]] | year=2002 | volume=390 | issue=1 | pages=267–279 | bibcode=2002A&A...390..267U | arxiv=astro-ph/0202458 | doi=10.1051/0004-6361:20020685 | s2cid=9389274}}</ref>

<ref name="Piccinini2026">{{cite journal |last1=Piccinini |first1=G. |last2=Petralia |first2=A. |display-authors=etal |date=January 2026 |title=True Masses using RV data with Hipparcos and Gaia Astrometry |journal=[[Astronomy & Astrophysics]] |volume= |issue= |pages= |doi= |arxiv=2601.09401}}</ref> }}

{{Sky|15|52|17.5474|-|18|26|09.834|109}} {{Stars of Libra}}

[[Category:G-type main-sequence stars]] [[Category:Planetary systems with one confirmed planet]] [[Category:Libra (constellation)]] [[Category:Durchmusterung objects|BD-17 4442]] [[Category:Henry Draper Catalogue objects|141937]] [[Category:Hipparcos objects|077740]]