HD 107148
{{Short description|Star in the constellation Virgo}}
{{Starbox begin
| name = HD 107148
}}
{{Starbox observe
| epoch = J2000.0
| constell = Virgo
}}
{{Starbox character
| type = main sequence + white dwarf
| class = G5V + DA
| variable =
}}
{{Starbox astrometry
| radial_v = 25.244{{±|0.0005}}
| prop_mo_ra = −54.565
| prop_mo_dec = −47.376
| parallax = 20.248
| p_error = 0.0283
}}
{{Starbox relpos
| epoch = 2009
| primary = HD 107148 A
| component = HD 107148 B
| angdistsec = 34.9
| posang = 174.7
| projsep = 1,790
}}
{{Starbox detail
| component1 = HD 107148 A
| mass = 1.1{{±|0.1}}
| radius = 1.15{{±|0.03}}
| gravity = 4.35{{±|0.03}}
| luminosity = 1.34{{±|0.05}}
| temperature = 5,789{{±|36}}
| age_gyr = 4{{±|1}}
| rotational_velocity = 1.22{{±|0.20}}
| component2 = HD 107148 B
| temperature2 = 6250{{±|250}}
}}
{{Starbox catalog
| names = {{odlist | 2MASS=J12191349-0319112 | BD=−02 3497 | HD=107148 | HIP=60081 | SAO=138714 | Gaia DR2=3693358861640279296 }}
}}
{{Starbox reference
| Simbad = HD+107148
}}
{{Starbox end}}
HD 107148 is a wide binary star system in the constellation of Virgo. A pair of exoplanets have been confirmed in orbit around the brighter star. This system is located at a distance of 161 light years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of 25.2 K. Although having an absolute magnitude of 4.47, at that range the system is too faint to be visible with the naked eye, having an apparent visual magnitude of 8.01.
The brighter primary member, designated component A, has a spectrum that presents as a G-type main-sequence star, a yellow dwarf, with a stellar classification of G5V. The star is about 4 billion years old and is spinning with a projected rotational velocity of 1.2 km/s. Based on the abundance of iron, a measure of the star's metallicity, it is twice as enriched with heavy elements than the Sun. The star exhibits a magnetic activity cycle with a period around 6 years. It has 1.1 times the mass of the Sun and 1.15 times the Sun's radius. HD 107148 is radiating 1.34 times the luminosity of the Sun from its photosphere at an effective temperature of 5,789 K.
In 2012, a comoving white dwarf stellar companion HD 107148 B was detected at projected separation of 1,790 AU, and was confirmed in 2014. It is a 0.6 {{Solar mass}} remnant core of the former 1.8{{±|0.2}} {{Solar mass}} star with a cooling age of {{val|2.1|0.3|u=Gyr}}. This was formerly the primary component of this system before it ejected much of its mass.
Planetary system
In 2006, a discovery of Saturn-mass planet was announced. Another Neptune-sized planet was discovered in 2021, together with significantly refined orbit of HD 107148 b.
HD 107148 should not be confused with HD 108147 located in Crux constellation, which also has an extrasolar planet discovered in 2000.
{{OrbitboxPlanet begin
}}
{{OrbitboxPlanet
| exoplanet = b
| mass = >0.196{{±|0.009}}
| period = 77.185{{±|0.01|0.025}}
| semimajor = 0.3692{{±|0.0037|0.0038}}
| eccentricity = 0.15{{±|0.02|0.06}}
}}
{{OrbitboxPlanet
| exoplanet = c
| mass = > 0.068{{±|0.004|0.005}}
| period = 18.3270{{±|0.0008|0.0016}}
| semimajor = 0.1415{{±|0.0015}}
| eccentricity = 0.40{{±|0.04|0.08}}
}}
{{Orbitbox end}}
See also
References
{{Reflist|refs=
{{cite simbad | title=HD 107148 | access-date=2018-11-12 }}
{{Cite Gaia DR3|3693358861640279296}}
| title=XHIP: An extended hipparcos compilation
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| journal=Astronomy Letters
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| bibcode=2012AstL...38..331A | s2cid=119257644
| doi=10.1134/S1063773712050015 | arxiv=1108.4971 }}
| title=Gaia Data Release 2. The catalogue of radial velocity standard stars
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| display-authors=1 | journal=Astronomy and Astrophysics
| volume=616 | pages=A7 | year=2018
| bibcode=2018A&A...616A...7S | arxiv=1804.09370
| doi=10.1051/0004-6361/201832795 | s2cid=52952408 }}
| title=Age consistency between exoplanet hosts and field stars
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| journal=Astronomy & Astrophysics
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| doi=10.1051/0004-6361/201527297 | arxiv=1511.01744
| bibcode=2016A&A...585A...5B | s2cid=53971692 }}
| title=Spectroscopic Parameters and atmosphEric ChemIstriEs of Stars (SPECIES). I. Code description and dwarf stars catalogue
| last1=Soto | first1=M. G. | last2=Jenkins | first2=J. S.
| journal=Astronomy & Astrophysics
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| pages=A76
| doi=10.1051/0004-6361/201731533 | arxiv=1801.09698
| bibcode=2018A&A...615A..76S }}
| title=Catalog of Nearby Exoplanets
| last1=Butler | first1=R. P. | last2=Wright | first2=J. T.
| last3=Marcy | first3=G. W. | last4=Fischer | first4=D. A.
| last5=Vogt | first5=S. S. | last6=Tinney | first6=C. G.
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| last9=Johnson | first9=J. A. | last10=McCarthy | first10=C.
| last11=Penny | first11=A. J. | display-authors=1
| journal=The Astrophysical Journal
| volume=646 | issue=1 | pages=505–522 | year=2006
| arxiv=astro-ph/0607493 | bibcode=2006ApJ...646..505B | bibcode-access=free
| doi=10.1086/504701 | doi-access=free | s2cid=119067572 }}
| title=Dynamical Architecture of the HD 107148 Planetary System
| last1=Eberhardt | first1=Jan | last2=Trifonov | first2=Trifon
| last3=Kürster | first3=Martin | last4=Stock | first4=Stephan
| last5=Henning | first5=Thomas | last6=Wollbold | first6=Anna
| last7=Reffert | first7=Sabine | last8=Lee | first8=Man Hoi
| last9=Zechmeister | first9=Mathias | last10=Rodler | first10=Florian
| last11=Zakhozhay | first11=Olga | last12=Heeren | first12=Paul
| last13=Gandolfi | first13=Davide | last14=Barragán | first14=Oscar
| last15=Tala Pinto | first15=Marcelo | last16=Wolthoff | first16=Vera
| last17=Sarkis | first17=Paula | last18=Brems | first18=Stefan S.
| display-authors=1 | journal=The Astronomical Journal
| volume=163 | issue=5 | page=198 | year=2022
| doi=10.3847/1538-3881/ac53b2 | doi-access=free | arxiv=2202.06702
| bibcode=2022AJ....163..198E | s2cid=246822760 }}
| title=The California Legacy Survey. I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades
| last1=Rosenthal | first1=Lee J. | last2=Fulton | first2=Benjamin J.
| last3=Hirsch | first3=Lea A. | last4=Isaacson | first4=Howard T.
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| last9=Petigura | first9=Erik A. | last10=Knutson | first10=Heather A.
| last11=Behmard | first11=Aida | last12=Chontos | first12=Ashley
| last13=Crepp | first13=Justin R. | last14=Crossfield | first14=Ian J. M.
| last15=Dalba | first15=Paul A. | last16=Fischer | first16=Debra A.
| last17=Henry | first17=Gregory W. | last18=Kane | first18=Stephen R.
| last19=Kosiarek | first19=Molly | last20=Marcy | first20=Geoffrey W.
| last21=Rubenzahl | first21=Ryan A. | last22=Weiss | first22=Lauren M.
| last23=Wright | first23=Jason T. | display-authors=1
| journal=The Astrophysical Journal Supplement Series
| volume=255 | issue=1 | page=8 | year=2021
| doi=10.3847/1538-4365/abe23c | bibcode=2021ApJS..255....8R
| arxiv=2105.11583 | s2cid=235186973 |doi-access=free }}
| title=New wide stellar companions of exoplanet host stars
| display-authors=1 | last1=Mugrauer | first1=M.
| last2=Ginski | first2=C. | last3=Seeliger | first3=M.
| journal=Monthly Notices of the Royal Astronomical Society
| volume=439 | issue=1 | pages=1063–1070 | date=March 2014
| doi=10.1093/mnras/stu044 | doi-access=free
| bibcode=2014MNRAS.439.1063M }}
| title=Wide companions to Hipparcos stars within 67 pc of the Sun
| last1=Tokovinin | first1=Andrei | last2=Lépine | first2=Sébastien
| journal=The Astronomical Journal
| volume=144 | issue=4 | id=102 | date=October 2012
| page=102
| doi=10.1088/0004-6256/144/4/102 | arxiv=1208.0626
| bibcode=2012AJ....144..102T }}
| title=Michigan catalogue of two-dimensional spectral types for the HD Stars
| last1=Houk | first1=N. | last2=Swift | first2=C.
| journal=Michigan Spectral Survey
| volume=5 | year=1999 | bibcode=1999MSS...C05....0H }}
}}
{{Sky|12|19|13.4909|-|03|19|11.242|167.18}}
{{Stars of Virgo}}
{{DEFAULTSORT:HD 107148}}
Category:G-type main-sequence stars
Category:Planetary systems with two confirmed planets