HD 63454
Template:Short description Template:Use dmy dates Template:Starbox begin Template:Starbox observe Template:Starbox character Template:Starbox astrometry Template:Starbox detail Template:Starbox catalog Template:Starbox reference Template:Starbox end HD 63454, formally named Ceibo, is a star located in the southern circumpolar constellation Chamaeleon near the border with Mensa. To see the star, one needs a small telescope because it has an apparent magnitude of 9.36,<ref name = Tycho2000/> which is below the limit for naked eye visibility. The object is located relatively close at a distance of 123 light-years based on Gaia DR3 parallax measurements<ref name = GaiaDR3/> but is receding with a heliocentric radial velocity of Template:Val.<ref name = Motou2005/> At its current distance, HD 63454's brightness is diminished by two tenths of a magnitude due to interstellar dust.<ref name = Gontcharov2017/> It has an absolute magnitude of +6.68.<ref name = Anderson2012/>
PropertiesEdit
HD 63454 has a stellar classification of K3 V(k),<ref name = Gray2006/> indicating that it is a K-type main-sequence star with some infilling of the calcium K and H lines.<ref name=gray2003/> It has 79% the mass of the Sun<ref name = Demarque2004/> and 80% the Sun's radius.<ref name = Kervella2004/> It radiates 28.7% the luminosity of the Sun<ref name = GaiaDR3/> from its photosphere at an effective temperature of Template:Val,<ref name = Sousa2008/> giving it an orange hue. HD 63454 has a solar metallicity<ref name = Ramírez2012/> and is estimated to 1.52 billion years old,<ref name = Demarque2004/> a third the age of the Sun. It spins modestly with a projected rotational velocity of Template:Val.<ref name = Soto2018/>
Planetary systemEdit
On Valentine’s Day 2005, a hot Jupiter HD 63454 b was found by Claire Moutou, Michel Mayor, and François Bouchy using the radial velocity method.<ref name = Motou2005/>
After the 2019 IAU100 NameExoWorlds campaign, the International Astronomical Union, approved the names proposed from Uruguay: Ceibo for the star and Ibirapitá for the planet, respectively after the native Uruguayan tree species Erythrina crista-galli and Peltophorum dubium.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
These names were announced on 17 December 2019, at a press conference of the IAU in Paris, together with other 111 sets of exoplanets and host stars.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Ceibo and Ibirapitá were proposed by Adrián Basedas, from the Astronomical Observatory of Liceo Nº9, Montevideo, Uruguay, who won the national contest "Nombra Tu Exoplaneta",<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> organized in Uruguay, to name HD 63454 and HD 63454 b.
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