HD 141937
{{short description|Star in the constellation Libra}}
{{Starbox begin}}
{{Starbox observe
| epoch = J2000
| constell = Libra
| dec = {{DEC|−18|26|09.7939}}
}}
{{Starbox character
| type =
| u-b =
| variable =
}}
{{Starbox astrometry
| radial_v = {{Val|−2.20|0.68}}
| prop_mo_ra = {{val|+97.231|0.133}}
| prop_mo_dec = {{val|+19.113|0.116}}
| parallax = 29.9453
| p_error = 0.0640
}}
{{Starbox detail
| source =
| luminosity = {{Val|1.202|0.003}}
| temperature = {{Val|5890|15|30|fmt=commas}}
| metal_fe = {{Val|+0.10|0.01}}
}}
{{Starbox catalog
| names = {{odlist | BD=−17° 4442 | HD=141937 | HIP=77740 | SAO=159551 }}
}}
{{Starbox reference
| Simbad = HD+141937
| EPE = HD+141937
}}
{{End}}
HD 141937 is a star in the southern zodiac constellation of 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, which means it is too faint to be seen with the naked eye. This object is located at a distance of 108.9 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −2.2 km/s. It has an absolute magnitude of 4.71.
This is a G-type main-sequence star with a stellar classification of G1V. 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 billion years old and is spinning with a projected rotational velocity of 6 km/s. The star is radiating 1.2 times the luminosity of the Sun from its photosphere at an effective temperature of 5,890 K.
The star has a substellar companion (HD 141937 b) announced in April 2001 by the European Southern Observatory. It has a minimum mass of 9.7 {{Jupiter mass|link=y}}. In 2020, the inclination of the orbit was measured, revealing its true mass to be 27.4 {{Jupiter mass|link=y}}, which makes it a brown dwarf. A 653-day orbit places the orbital distance 1.5 times farther away from the star as Earth is from the Sun, with a high eccentricity of 41%.
{{OrbitboxPlanet begin
}}
{{OrbitboxPlanet
| exoplanet = b
| mass = {{val|27.42|6.78|9.86}}
| period = {{Val|653.22|1.21}}
| semimajor = {{Val|1.4877|0.0018}}
| eccentricity = {{Val|0.41|0.01}}
| inclination = {{val|20.52|12.47|4.16}}
}}
{{Orbitbox end}}
See also
References
{{Reflist|refs=
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| journal=Astronomy Letters | arxiv=1108.4971
| volume=38 | issue=5 | pages=331 | year=2012
| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | s2cid=119257644 }}
| 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 }}
| 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 }}
{{Cite Gaia DR2|6248534171318085376}}
| display-authors=1 | last1=Gray | first1=R. O.
| first2=C. J. | last2=Corbally | first3=R. F. | last3=Garrison
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| 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 }}
| title=Precise determination of fundamental parameters of six exoplanet host stars and their planets
| last1=Liu | first1=Kang | last2=Bi | first2=Shao-Lan
| last3=Li | first3=Tan-Da | last4=Liu | first4=Zhi-E.
| last5=Tian | first5=Zhi-Jia | last6=Ge | first6=Zhi-Shuai
| display-authors=1 | journal=Research in Astronomy and Astrophysics
| volume=14 | issue=11 | id=1447-1457 | date=November 2014
| pages=1447–1457 | doi=10.1088/1674-4527/14/11/008 | arxiv=1406.2173
| bibcode=2014RAA....14.1447L | s2cid=118779573 }}
| 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 }}
{{cite simbad | title=HD 117207 | access-date=2018-07-23}}
| 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 }}
}}
{{Sky|15|52|17.5474|-|18|26|09.834|109}}
{{Stars of Libra}}
{{DEFAULTSORT:HD 141937}}
Category:G-type main-sequence stars
Category:Libra (constellation)