HD 49674
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HD 49674 is a solar-type star with an exoplanetary companion<ref name="Butler2003"/> in the northern constellation of 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 light-years from the Sun based on parallax, and is drifting further away with a radial velocity of +12 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 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 core. Spinning with a projected rotational velocity of 4.7 km/s,<ref name=Earle2017/> it is younger than the Sun, roughly two billion years of age, and is a metal-rich star.<ref name="Butler2003"/> HD 49674 has a similar mass and radius as the Sun. It is radiating 96% of the Sun's luminosity from its photosphere at an effective temperature of Template:Val.<ref name="Bonfanti2015"/>
Planetary systemEdit
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 MJ. This planet orbits very close to the star, with a semimajor axis of Template:Cvt.<ref name="Butler2006"/>
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