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HD 169830 is a star in the southern constellation of Sagittarius. It has a yellow-white hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.90.<ref name=Anderson_Francis_2012/> The star is located at a distance of 120 light years from the Sun based on parallax. It is drifting closer with a radial velocity of −17.3 km/s,<ref name=Soubiran_et_al_2018/> and is predicted to come as close as Template:Convert in 2.08 million years.<ref name=Bailer-Jones_et_al_2018/> HD 169830 is known to be orbited by two large Jupiter-like exoplanets.

This is an F-type main-sequence star<ref name="Naef2001"/> with a stellar classification of F7V.<ref name=Gray_et_al_2006/> It is 3.83<ref name=Saffe_et_al_2005/> billion years old and chromospherically inactive<ref name=Saffe_et_al_2005/> with a slow rotation rate,<ref name=Saffe_et_al_2005/> having a projected rotational velocity of 3.83 km/s.<ref name=Fischer_Valenti_2005/> This star is 40% more massive and 84% larger than the Sun. Combining the mass and radius makes the surface gravity only 41% that of the Sun. It is radiating 4.6<ref name="Naef2001"/> times the luminosity of the Sun from its photosphere at an effective temperature of 6,300 K.<ref name="Naef2001"/>

A candidate stellar companion, designated component B, lies at an angular separation of Template:Val along a position angle of 265°.<ref name=Henry_et_al_2006/>

Planetary systemEdit

On April 15, 2000, the Geneva Extrasolar Planet Search Team announced the discovery of a minimum mass Template:Jupiter mass planet in a 226-day orbit.<ref name="eso0019"/><ref name="Naef2001"/> Three years later on June 30, 2003, the same team, using the same method, discovered a minimum mass Template:Jupiter mass second planet orbiting the star.<ref name="Mayor2004"/> In 2022, the inclination and true mass of HD 169830 c were measured via astrometry.<ref name="Feng2022"/>

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See alsoEdit

ReferencesEdit

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External linksEdit

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