View source for HD 49674

{{Short description|Star in the constellation Auriga}}
{{Starbox begin|name=HD 49674 / Nervia}}
{{Starbox image
 | image       = [[Image:HIP 32916.jpg|250px]]
 | caption     = HD 49674 (center) in optical light
}}
{{Starbox observe
 | epoch       = J2000
 | constell    = [[Auriga (constellation)|Auriga]]<ref name=Anderson_Francis_2012/>
 | ra          = {{RA|06|51|30.51621}}<ref name=GaiaDR3/>
 | dec         = {{DEC|+40|52|03.9241}}<ref name=GaiaDR3/>
 | appmag_v    = 8.10<ref name=Anderson_Francis_2012/>
}}
{{Starbox character
 | type        = [[main sequence]]<ref name=GaiaDR3/>
 | class       = G3V<ref name=Grieves_et_al_2018/>
 | r-i         = 
 | v-r         = 
 | b-v         = {{val|0.729|0.015}}<ref name=Anderson_Francis_2012/>
 | u-b         = 
 | variable    =
}}
{{Starbox astrometry
 | radial_v    = {{val|11.98|0.13}}<ref name=GaiaDR3/>
 | prop_mo_ra  = 34.682
 | prop_mo_dec = −122.686
 | pm_footnote = <ref name=GaiaDR3/>
 | parallax    = 23.3216
 | p_error     = 0.0218
 | parallax_footnote = <ref name=GaiaDR3/>
 | absmag_v    = 4.88<ref name=Anderson_Francis_2012/>
}}
{{Starbox detail
 | mass        = {{val|1.07|0.02}}<ref name="Bonfanti2015"/>
 | radius      = {{val|1.01|0.01}}<ref name="Bonfanti2015"/>
 | luminosity  = {{val|0.96|0.01}}<ref name="Bonfanti2015"/>
 | gravity     = {{val|4.46|0.02}}<ref name="Bonfanti2015"/>
 | temperature = {{val|5702|28|fmt=commas}}<ref name="Bonfanti2015"/>
 | metal_fe    = {{val|0.34|0.06}}<ref name=Grieves_et_al_2018/>
 | age_gyr     = {{val|1.8|1.2}}<ref name="Bonfanti2015"/>
 | rotational_velocity = 4.7<ref name=Earle2017/>
}}
{{Starbox catalog
 | names = {{odlist | name=Nervia | GSC=02946-00426 | SAO=41390 | HD=49674 | HIP=32916 | BD=+41°1544 | PPM=49392 | TYC=2946-426-1 }}<ref name=SIMBAD/>
}}
{{Starbox reference
 | Simbad = HD+49674
 | NSTED = HD-49674
}}
{{Starbox end}}

'''HD 49674''' is a [[solar-type star]] with an [[exoplanet]]ary companion<ref name="Butler2003"/> in the [[Northern celestial hemisphere|northern]] [[constellation]] of [[Auriga (constellation)|Auriga]]. It has an [[apparent visual magnitude]] of 8.10<ref name=Anderson_Francis_2012/> and thus is an eighth-magnitude [[star]] that is too faint to be readily visible to the naked eye. The system is located at a distance of 140&nbsp;[[light-year]]s from the [[Sun]] based on [[stellar parallax|parallax]], and is drifting further away with a [[radial velocity]] of +12&nbsp;km/s.<ref name=GaiaDR3/>

HD 49674, and its planetary system, was chosen as part of the 2019 [[NameExoWorlds]] campaign organised by the [[International Astronomical Union]], which assigned each country a star and planet to be named. HD 49674 was assigned to [[Belgium]]. The winning proposal named the star '''Nervia''' and the planet '''Eburonia''', both after prominent [[Belgae|Belgic]] tribes, the [[Nervii]] and [[Eburones]], respectively.<ref name="nameexoworldsbelgium"/>

This is an ordinary [[G-type main-sequence star]] with a [[stellar classification]] of G3V,<ref name=Grieves_et_al_2018/> which indicates it is generating energy through [[hydrogen fusion]] at its [[stellar core|core]]. Spinning with a [[projected rotational velocity]] of 4.7&nbsp;km/s,<ref name=Earle2017/> it is younger than the Sun, roughly two billion years of age, and is a [[metallicity|metal-rich]] star.<ref name="Butler2003"/> HD 49674 has a similar [[solar mass|mass]] and [[solar radius|radius]] as the Sun. It is radiating 96% of the [[Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of {{val|5702|fmt=commas|ul=K}}.<ref name="Bonfanti2015"/>

==Planetary system==
At the time of discovery of the planet [[HD 49674 b]] in 2002, it was the least massive exoplanet known, very close to the boundary between sub-[[Jupiter mass]] and [[Neptune]] mass at 0.1 M<sub>J</sub>. This planet orbits very close to the star, with a [[semimajor axis]] of {{cvt|0.0580|AU|Gm|lk=on}}.<ref name="Butler2006"/>

{{OrbitboxPlanet begin
 | table_ref    = <ref name="Butler2006"/>
}}
{{OrbitboxPlanet
 | exoplanet    = [[HD 49674 b|b / Eburonia]]
 | mass         = >0.105 ± 0.011
 | period       = 4.94737 ± 0.00098
 | semimajor    = 0.0580 ± 0.0034
 | eccentricity = 0.087 ± 0.095
}}
{{Orbitbox end}}

==See also==
* [[Lists of exoplanets]]

==References==
{{Reflist|refs=

<ref name=SIMBAD>{{cite simbad
 | title=HD 49674 | access-date=2021-10-24 }}</ref>

<ref name=GaiaDR3>{{Cite Gaia DR3|951427000863064192}}</ref>

<ref name=Anderson_Francis_2012>{{cite XHIP|32916}}</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=Grieves_et_al_2018>{{cite journal
 | title=Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey
 | display-authors=1 | last1=Grieves | first1=N.
 | last2=Ge | first2=J. | last3=Thomas | first3=N.
 | last4=Willis | first4=K. | last5=Ma | first5=B.
 | last6=Lorenzo-Oliveira | first6=D. | last7=Queiroz | first7=A. B. A.
 | last8=Ghezzi | first8=L. | last9=Chiappini | first9=C.
 | last10=Anders | first10=F. | last11=Dutra-Ferreira | first11=L.
 | last12=Porto de Mello | first12=G. F. | last13=Santiago | first13=B. X.
 | last14=da Costa | first14=L. N. | last15=Ogando | first15=R. L. C.
 | last16=del Peloso | first16=E. F. | last17=Tan | first17=J. C.
 | last18=Schneider | first18=D. P. | last19=Pepper | first19=J.
 | last20=Stassun | first20=K. G. | last21=Zhao | first21=B.
 | last22=Bizyaev | first22=D. | last23=Pan | first23=K.
 | journal=Monthly Notices of the Royal Astronomical Society
 | volume=481 | issue=3 | pages=3244–3265 | date=December 2018
 | arxiv=1803.11538 | bibcode=2018MNRAS.481.3244G 
 | doi=10.1093/mnras/sty2431 | doi-access=free }}</ref>

<ref name="Bonfanti2015">{{cite journal
 | title=Revising the ages of planet-hosting stars
 | url=http://www.aanda.org/articles/aa/full_html/2015/03/aa24951-14/aa24951-14.html
 | last1=Bonfanti | first1=A. | last2=Ortolani | first2=S.
 | last3=Piotto | first3=G. | last4=Nascimbeni | first4=V.
 | display-authors=1 | journal=Astronomy and Astrophysics
 | year=2015 | volume=575 | at=A18
 | arxiv=1411.4302 | bibcode=2015A&A...575A..18B
 | doi=10.1051/0004-6361/201424951 | s2cid=54555839 }}</ref>

<ref name="Butler2003">{{cite journal
 | url=http://www.iop.org/EJ/article/0004-637X/582/1/455/56131.html
 | title=Seven New Keck Planets Orbiting G and K Dwarfs
 | last1=Butler | first1=R. Paul | last2=Marcy | first2=Geoffrey W. 
 | last3=Vogt | first3=Steven S. | last4=Fischer | first4=Debra A.
 | last5=Henry | first5=Gregory W. | last6=Laughlin | first6=Gregory
 | last7=Wright | first7=Jason T. | display-authors=1
 | journal=The Astrophysical Journal
 | date=2003 | volume=582 | issue=1 | pages=455–466
 | doi=10.1086/344570 | bibcode=2003ApJ...582..455B | citeseerx=10.1.1.7.6988 | s2cid=17608922
 }}</ref>

<ref name="Butler2006">{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html | 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. | last7=Jones | first7=H. R. A. | last8=Carter | first8=B. D. | last9=Johnson | first9=J. A. | display-authors=1 | journal=The Astrophysical Journal | volume=646 | issue=1 | pages=505–522 | date=2006 | doi=10.1086/504701 | bibcode=2006ApJ...646..505B | arxiv=astro-ph/0607493 | hdl=2299/1103 | s2cid=119067572 | access-date=2009-12-23 | archive-date=2019-12-07 | archive-url=https://web.archive.org/web/20191207150418/http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html | url-status=dead }}</ref>

<ref name="nameexoworldsbelgium">{{Cite web
 | url=http://www.nameexoworlds.iau.org/belgium
 | title=Belgium | website=NameExoworlds
 | language=en | access-date=2019-12-22 }}</ref>

}}

==External links==
* {{cite encyclopedia | url=http://exoplanet.eu/star.php?st=HD+49674 | archive-url=https://web.archive.org/web/20071106055958/http://exoplanet.eu/star.php?st=HD+49674 | url-status=dead | archive-date=November 6, 2007 | encyclopedia=[[Extrasolar Planets Encyclopaedia]] | title=Notes for star HD 49674 | access-date=2008-08-23}}
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HIP%2032916 HIP 32916] Catalog
* [http://aladin.u-strasbg.fr/AladinPreview?-c=06+51+30.5164%2B40+52+03.923&ident=HD++49674&submit=Aladin+previewer Image HD 49674]

{{Sky|06|51|30.5164|+|40|52|03.923|133.8}}
{{Stars of Auriga}}

{{DEFAULTSORT:HD 49674}}
<!-- Properties -->
[[Category:G-type main-sequence stars]]
[[Category:Planetary systems with one confirmed planet]]
<!-- Other -->
[[Category:Auriga]]
[[Category:Durchmusterung objects|BD+41 1544]]
[[Category:Henry Draper Catalogue objects|049674]]
[[Category:Hipparcos objects|032916]]
[[Category:Stars with proper names|Nervia]]
[[Category:Population I stars]]