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Coordinates: Sky map 07h 39m 21.8511s, −78° 16′ 44.300″
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{{Short description|Star in the constellation Chamaeleon}}
{{Use dmy dates|date=July 2024}}
{{Starbox begin
{{Starbox begin
| name = [[Henry Draper catalogue|HD]] 63454
| name = [[Henry Draper catalogue|HD]] 63454 / Ceibo
}}
}}
{{Starbox observe
{{Starbox observe
| epoch = J2000.0
| epoch = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
| constell = [[Chamaeleon]]
| constell = [[Chamaeleon]]
| ra = {{RA|07|39|21.851}}<ref name="van Leeuwen2007"/>
| ra = {{RA|07|39|21.85290}}<ref name = GaiaDR3/>
| dec = {{DEC|−78|16|44.31}}<ref name="van Leeuwen2007"/>
| dec = {{DEC|−78|16|44.3078}}<ref name = GaiaDR3/>
| appmag_v = 9.40
| appmag_v = 9.36{{±|0.02}}<ref name = Tycho2000/>
}}
}}
{{Starbox character
{{Starbox character
| class = K4V
| class = K3 V(k)<ref name = Gray2006/>
| b-v = +1.06<ref name = Tycho2000/>
| r-i =
| u-b = +0.98<ref name = Paunzen2022/>
| v-r =
| b-v =
| variable =
| u-b =
| variable =
}}
}}
{{Starbox astrometry
{{Starbox astrometry
| radial_v =
| radial_v = +33.8<ref name = Motou2005/>
| prop_mo_ra = −20.82 ± 0.85<ref name="van Leeuwen2007"/>
| prop_mo_ra = −19.556
| prop_mo_dec = −40.64 ± 0.94<ref name="van Leeuwen2007"/>
| prop_mo_dec = −39.926
| pm_footnote = <ref name = GaiaDR3/>
| parallax = 28.95
| p_error = 0.81
| parallax = 26.5541
| p_error = 0.0114
| parallax_footnote = <ref name="van Leeuwen2007"/>
| parallax_footnote = <ref name = GaiaDR3/>
| absmag_v =
| absmag_v = +6.68<ref name = Anderson2012/>
}}
}}
{{Starbox detail
{{Starbox detail
| mass = 0.79 ± 0.02<ref name="Bonfanti2015"/>
| mass = 0.79<ref name = Demarque2004/>
| radius = 0.72 ± 0.01<ref name="Bonfanti2015"/>
| radius = 0.80{{±|0.04}}<ref name = Kervella2004/>
| luminosity = 0.242 ± 0.003<ref name="Bonfanti2015"/>
| luminosity = 0.287{{±|0.005}}<ref name = GaiaDR3/>
| gravity = 4.62 ± 0.02<ref name="Bonfanti2015"/>
| gravity = 4.52{{±|0.16}}<ref name = Sousa2008/>
| temperature = 4788 ± 20<ref name="Bonfanti2015"/>
| temperature = 4,840{{±|66}}<ref name = Sousa2008/>
| metal_fe =
| metal_fe = 0.00{{±|0.06}}<ref name = Ramírez2012/>
⚫
| rotational_velocity = 2.6<ref name = Soto2018/>
| rotation =
⚫
| age_gyr = 1.52<ref name = Demarque2004/>
⚫
| rotational_velocity =
⚫
| age_gyr = 2.7 ± 3.3<ref name="Bonfanti2015"/>
}}
}}
{{Starbox catalog
{{Starbox catalog
| names = Ceibo, [[Durchmusterung|CD]]−77°298, [[Hipparcos#Published catalogues|HIP]] 37284
| names = Ceibo, {{odlist|CD = −77°298|CPD = −77°324|HD = 63454|HIP = 37284|TYC = 9385-1045-1}}<ref name = SIMBAD/>
}}
}}
{{Starbox reference
{{Starbox reference
| Simbad = HD+63454
| Simbad = HD+63454
}}
}}
{{Starbox end}}
{{Starbox end}}
'''HD 63454''', formally named '''Ceibo''', is a [[star]] located in the southern [[circumpolar constellation]] [[Chamaeleon]] near the border with [[Mensa (constellation)|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 year]]s based on [[Gaia DR3]] [[parallax]] measurements<ref name = GaiaDR3/> but is receding with a heliocentric [[radial velocity]] of {{val|33.8|ul=km/s}}.<ref name = Motou2005/> At its current distance, HD 63454's brightness is diminished by two tenths of a [[magnitude (astronomy)|magnitude]] due to [[extinction (astronomy)|interstellar dust]].<ref name = Gontcharov2017/> It has an [[absolute magnitude]] of +6.68.<ref name = Anderson2012/>
'''HD 63454''', now known as "Ceibo" is a ninth [[apparent magnitude|magnitude]] [[orange dwarf|K-type main sequence]] [[star]] located approximately 117 [[light-year]]s away in the [[constellation]] of [[Chamaeleon]]. It is somewhat cooler and less luminous than our [[Sun]]. To see the star one needs a small [[telescope]]. It is located near the south [[celestial pole]] and is never visible north of [[latitude]] 12°N.

==Properties==
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-line|calcium K]] and [[Calcium H-line|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 {{val|4840|ul=K|fmt=commas}},<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 {{val|2.6|ul=km/s}}.<ref name = Soto2018/>


== Planetary system ==
== Planetary system ==
On [[Valentine’s Day]] 2005, a [[hot Jupiter]] [[HD 63454 b]] was found by [[C. Moutou|Moutou]], [[Michel Mayor|Mayor]], and [[F. Bouchy|Bouchy]] using the [[radial velocity method]].<ref name="Moutou2005"/>
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]]: '''[[Erythrina crista-galli|Ceibo (Erythrina crista-galli)]]''' for the star and '''[[Peltophorum dubium|Ibirapitá (Peltophorum dubium)]]''' for the [[exoplanet]].<ref>{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=IAU100 NameExoWorlds: Approved names|last=|first=|date=|website=|url-status=live|archive-url=|archive-date=|access-date=}}</ref> They are "Culturally significant species of trees native to [[Uruguay]]." [[Erythrina crista-galli|Ceibo]] is the name of the native tree of [[Uruguay]] that gives rise to the national flower." And [[Peltophorum dubium|Ibirapitá]] is the name of a native tree that is characteristic of the country of [[Uruguay]], and is also known as [[José Gervasio Artigas|Artigas]]' tree, after the national hero.
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>{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=IAU100 NameExoWorlds: Approved names|last=|first=|date=|website=|access-date=}}</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>{{Cite web|url=http://www.nameexoworlds.iau.org/get-involved|title=IAU100 NameExoWorlds National campaigns|last=|first=|date=|website=|url-status=live|archive-url=|archive-date=|access-date=}}</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>{{Cite web|url=http://www.iau-100.edu.uy/exoplanetas/|title=Nombra Tu Exoplaneta Uruguay|last=|first=|date=|website=|url-status=live|archive-url=|archive-date=|access-date=}}</ref>, organized in [[Uruguay]], to name HD 63454 and HD 63454 b.
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>{{Cite web|url=http://www.nameexoworlds.iau.org/get-involved|title=IAU100 NameExoWorlds National campaigns|last=|first=|date=|website=|access-date=}}</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>{{Cite web|url=http://www.iau-100.edu.uy/exoplanetas/|title=Nombra Tu Exoplaneta Uruguay|last=|first=|date=17 December 2019|website=|access-date=}}</ref> organized in Uruguay, to name HD 63454 and HD 63454 b.


<br />
<br />


{{OrbitboxPlanet begin
{{OrbitboxPlanet begin
| table_ref = <ref name="Moutou2005"/>
| table_ref =
}}
}}
{{OrbitboxPlanet
{{OrbitboxPlanet
| exoplanet = [[HD 63454 b|b]]
| exoplanet = [[HD 63454 b|Ibirapitá]]
| mass = >0.38
| mass = ≥0.25{{±|0.01}}<ref name = Stassun2017/>
| period = 2.817822 ± 0.000095
| period = 2.818049{{±|0.000071}}<ref name = Kane2011/>
| semimajor = 0.036
| semimajor = 0.036<ref name = Motou2005/>
| radius = ~1.10<ref name = Kane2011/>
| eccentricity = 0
| eccentricity = 0.0<ref name = Motou2005/>
}}
}}
{{Orbitbox end}}
{{Orbitbox end}}
Line 72: Line 76:
==References==
==References==
{{reflist|refs=
{{reflist|refs=
<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 }}</ref>


<ref name="Moutou2005">{{cite journal | url=http://www.aanda.org/articles/aa/full/2005/31/aa2826-05/aa2826-05.html | title=The HARPS search for southern extra-solar planets IV. Three close-in planets around HD 2638, HD 27894 and HD 63454 | last1=Moutou | first1=C. | last2=Mayor | first2=M. | last3=Bouchy | first3=F. | last4=Lovis | first4=C. | last5=Pepe | first5=F. | last6=Queloz | first6=D. | last7=Santos | first7=N. C. | last8=Udry | first8=S. | last9=Benz | first9=W. | display-authors=1 | journal=Astronomy and Astrophysics | year=2005 | volume=439 | issue=1 | pages=367–373 | bibcode=2005A&A...439..367M | doi=10.1051/0004-6361:20052826 | arxiv=1411.7048 }}</ref>
<ref name=gray2003>{{cite journal|bibcode=2003AJ....126.2048G|title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I|journal=The Astronomical Journal|volume=126|issue=4|pages=2048|last1=Gray|first1=R. O.|last2=Corbally|first2=C. J.|last3=Garrison|first3=R. F.|last4=McFadden|first4=M. T.|last5=Robinson|first5=P. E.|year=2003|doi=10.1086/378365|arxiv = astro-ph/0308182 |s2cid=119417105}}</ref>

<ref name = Gray2006>{{cite journal | last1 = Gray | first1 = R. O. | last2 = Corbally | first2 = C. J. | last3 = Garrison | first3 = R. F. | last4 = McFadden | first4 = M. T. | last5 = Bubar | first5 = E. J. | last6 = McGahee | first6 = C. E. | last7 = O'Donoghue | first7 = A. A. | last8 = Knox | first8 = E. R. | title = Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample | journal = The Astronomical Journal | date = 2 June 2006 | volume = 132 | issue = 1 | pages = 161–170 | issn = 0004-6256 | eissn = 1538-3881 | doi = 10.1086/504637 | bibcode = 2006AJ....132..161G | arxiv = astro-ph/0603770 | doi-access = free }}</ref>

<ref name = Tycho2000>{{cite journal | last1 = Høg | first1 = E. | last2 = Fabricius | first2 = C. | last3 = Makarov | first3 = V. V. | last4 = Urban | first4 = S. | last5 = Corbin | first5 = T. | last6 = Wycoff | first6 = G. | last7 = Bastian | first7 = U. | last8 = Schwekendiek | first8 = P. | last9 = Wicenec | first9 = A. | title = The Tycho-2 catalogue of the 2.5 million brightest stars |journal=Astronomy and Astrophysics | date = March 2000 | volume = 355 | pages = L27–L30 | bibcode = 2000A&A...355L..27H | issn = 0004-6361}}</ref>

<ref name = Motou2005>{{cite journal | last1 = Moutou | first1 = C. | last2 = Mayor | first2 = M. | last3 = Bouchy | first3 = F. | last4 = Lovis | first4 = C. | last5 = Pepe | first5 = F. | last6 = Queloz | first6 = D. | last7 = Santos | first7 = N. C. | last8 = Udry | first8 = S. | last9 = Benz | first9 = W. | last10 = Lo Curto | first10 = G. | last11 = Naef | first11 = D. | last12 = Ségransan | first12 = D. | last13 = Sivan | first13 = J.-P. | title = The HARPS search for southern extra-solar planets. IV. Three close-in planets around HD 2638, HD 27894 and HD 63454 | journal = Astronomy & Astrophysics | date = 22 July 2005 | volume = 439 | issue = 1 | pages = 367–373 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361:20052826 | bibcode = 2005A&A...439..367M | doi-access = free}}</ref>

<ref name = Anderson2012>{{cite journal | last1 = Anderson | first1 = E. | last2 = Francis | first2 = Ch. | title = XHIP: An extended hipparcos compilation | journal = Astronomy Letters | date = May 2012 | volume = 38 | issue = 5 | pages = 331–346 | issn = 1063-7737 | eissn = 1562-6873 | doi = 10.1134/S1063773712050015 | bibcode = 2012AstL...38..331A | arxiv = 1108.4971| s2cid = 119257644 }}</ref>

<ref name = GaiaDR3>{{cite DR3|5209903017765189760}}</ref>

<ref name = Soto2018>{{cite journal | last1 = Soto | first1 = M. G. | last2 = Jenkins | first2 = J. S. | title = Spectroscopic Parameters and Atmospheric Chemistries of Stars (SPECIES). I. Code description and dwarf stars catalogue | journal = Astronomy & Astrophysics | date = July 2018 | volume = 615 | page = A76 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/201731533 | bibcode = 2018A&A...615A..76S | arxiv = 1801.09698 | doi-access = free}}</ref>

<ref name = Sousa2008>{{cite journal | last1 = Sousa | first1 = S. G. | last2 = Santos | first2 = N. C. | last3 = Mayor | first3 = M. | last4 = Udry | first4 = S. | last5 = Casagrande | first5 = L. | last6 = Israelian | first6 = G. | last7 = Pepe | first7 = F. | last8 = Queloz | first8 = D. | last9 = Monteiro | first9 = M. J. P. F. G. | title = Spectroscopic parameters for 451 stars in the HARPS GTO planet search program | journal = Astronomy & Astrophysics | date = 4 June 2008 | volume = 487 | issue = 1 | pages = 373–381 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361:200809698 | bibcode = 2008A&A...487..373S | arxiv = 0805.4826 | doi-access = free}}</ref>

<ref name = Demarque2004>{{cite journal | last1 = Demarque | first1 = Pierre | last2 = Woo | first2 = Jong‐Hak | last3 = Kim | first3 = Yong‐Cheol | last4 = Yi | first4 = Sukyoung K. | title = ''Y''<sup>2</sup> Isochrones with an Improved Core Overshoot Treatment | journal = The Astrophysical Journal Supplement Series | date = December 2004 | volume = 155 | issue = 2 | pages = 667–674 | issn = 0067-0049 | eissn = 1538-4365 | doi = 10.1086/424966 | bibcode = 2004ApJS..155..667D | doi-access = free| arxiv = astro-ph/0409024 }}</ref>

<ref name = Kervella2004>{{cite journal | last1 = Kervella | first1 = P. | last2 = Thévenin | first2 = F. | last3 = Di Folco | first3 = E. | last4 = Ségransan | first4 = D. | title = The angular sizes of dwarf stars and subgiants | journal = Astronomy & Astrophysics | date = October 2004 | volume = 426 | issue = 1 | pages = 297–307 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361:20035930 | bibcode = 2004A&A...426..297K | arxiv = astro-ph/0404180 | doi-access = free }}</ref>

<ref name = Ramírez2012>{{cite journal | last1 = Ramírez | first1 = I. | last2 = Fish | first2 = J. R. | last3 = Lambert | first3 = D. L. | last4 = Allende Prieto | first4 = C. | title = Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets | journal = The Astrophysical Journal | date = 13 August 2012 | volume = 756 | issue = 1 | page = 46 | issn = 0004-637X | eissn = 1538-4357 | doi = 10.1088/0004-637X/756/1/46 | bibcode = 2012ApJ...756...46R | arxiv = 1207.0499 | doi-access = free}}</ref>

<ref name = Paunzen2022>{{cite journal | last1 = Paunzen | first1 = E. | title = Catalogue of stars measured in the Geneva seven-colour photometric system | journal = Astronomy & Astrophysics | date = May 2022 | volume = 661 | page = A89 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/202142355 | pmid = | bibcode = 2022A&A...661A..89P | doi-access = free | arxiv = 2111.04810 }}</ref>

<ref name = Gontcharov2017>{{cite journal | last1 = Gontcharov | first1 = George A. | last2 = Mosenkov | first2 = Aleksandr V. | title = Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars | journal = Monthly Notices of the Royal Astronomical Society | date = 28 September 2017 | volume = 472 | issue = 4 | pages = 3805–3820 | issn = 0035-8711 | eissn = 1365-2966 | doi = 10.1093/mnras/stx2219 | bibcode = 2017MNRAS.472.3805G | arxiv = 1709.01160 | doi-access = free}}</ref>

<ref name = Stassun2017>{{cite journal | last1 = Stassun | first1 = Keivan G. | last2 = Collins | first2 = Karen A. | last3 = Gaudi | first3 = B. Scott | title = Accurate Empirical Radii and Masses of Planets and Their Host Stars with ''Gaia'' Parallaxes | journal = The Astronomical Journal | date = 3 March 2017 | volume = 153 | issue = 3 | page = 136 | eissn = 1538-3881 | doi = 10.3847/1538-3881/aa5df3 | bibcode = 2017AJ....153..136S | arxiv = 1609.04389 | doi-access = free}}</ref>

<ref name = Kane2011>{{cite journal | last1 = Kane | first1 = Stephen R. | last2 = Dragomir | first2 = Diana | last3 = Ciardi | first3 = David R. | last4 = Lee | first4 = Jae-Woo | last5 = Lo Curto | first5 = Gaspare | last6 = Lovis | first6 = Christophe | last7 = Naef | first7 = Dominique | author8-link=Suvrath Mahadevan | last8 = Mahadevan | first8 = Suvrath | last9 = Pilyavsky | first9 = Genady | last10 = Udry | first10 = Stephane | last11 = Wang | first11 = Xuesong | last12 = Wright | first12 = Jason | title = Stellar Variability of the Exoplanet Hosting Star HD 63454 | journal = The Astrophysical Journal | date = 3 August 2011 | volume = 737 | issue = 2 | page = 58 | issn = 0004-637X | eissn = 1538-4357 | doi = 10.1088/0004-637X/737/2/58 | bibcode = 2011ApJ...737...58K | arxiv = 1105.6131 | doi-access = free}}</ref>

<ref name = SIMBAD>{{Cite simbad|title = HD 63454|access-date = 11 January 2023}}</ref>


<ref name="van Leeuwen2007">{{cite journal | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/articles/aa/abs/2007/41/aa8357-07/aa8357-07.html | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 }} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=37171 Vizier catalog entry ]</ref>
}}
}}


== External links ==
== External links ==
* {{cite web | url=http://exoplanet.eu/star.php?st=HD+63454 | title=Notes for star HD 63454 | work=The Extrasolar Planets Encyclopaedia | accessdate=2008-08-22}}
* {{cite encyclopedia | url=http://exoplanet.eu/star.php?st=HD+63454 | archive-url=https://web.archive.org/web/20071106060036/http://exoplanet.eu/star.php?st=HD+63454 | url-status=dead | archive-date=November 6, 2007 | encyclopedia=[[Extrasolar Planets Encyclopaedia]] | title=Notes for star HD 63454 | access-date=2008-08-22}}


{{Sky|07|39|21.8511|-|78|16|44.300|116.7}}
{{Sky|07|39|21.8511|-|78|16|44.300|116.7}}
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{{Stars of Chamaeleon}}
{{Stars of Chamaeleon}}


{{DEFAULTSORT:HD 63454}}
[[Category:K-type main-sequence stars]]
[[Category:K-type main-sequence stars]]
[[Category:Henry Draper Catalogue objects|063454]]
[[Category:Henry Draper Catalogue objects|063454]]
[[Category:Hipparcos objects|037284]]
[[Category:Hipparcos objects|037284]]
[[Category:Chamaeleon (constellation)]]
[[Category:Chamaeleon]]
[[Category:Planetary systems]]
[[Category:Planetary systems with one confirmed planet]]
[[Category:Durchmusterung objects]]
[[Category:Durchmusterung objects|CD-77 00298]]


{{main-star-stub}}

Latest revision as of 02:11, 25 July 2024

HD 63454 / Ceibo
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon
Right ascension 07h 39m 21.85290s[1]
Declination −78° 16′ 44.3078″[1]
Apparent magnitude (V) 9.36±0.02[2]
Characteristics
Spectral type K3 V(k)[3]
U−B color index +0.98[4]
B−V color index +1.06[2]
Astrometry
Radial velocity (Rv)+33.8[5] km/s
Proper motion (μ) RA: −19.556 mas/yr[1]
Dec.: −39.926 mas/yr[1]
Parallax (π)26.5541 ± 0.0114 mas[1]
Distance122.83 ± 0.05 ly
(37.66 ± 0.02 pc)
Absolute magnitude (MV)+6.68[6]
Details
Mass0.79[7] M☉
Radius0.80±0.04[8] R☉
Luminosity0.287±0.005[1] L☉
Surface gravity (log g)4.52±0.16[9] cgs
Temperature4,840±66[9] K
Metallicity [Fe/H]0.00±0.06[10] dex
Rotational velocity (v sin i)2.6[11] km/s
Age1.52[7] Gyr
Other designations
Ceibo, CD−77°298, CPD−77°324, HD 63454, HIP 37284, TYC 9385-1045-1[12]
Database references
SIMBADdata

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,[2] 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[1] but is receding with a heliocentric radial velocity of 33.8 km/s.[5] At its current distance, HD 63454's brightness is diminished by two tenths of a magnitude due to interstellar dust.[13] It has an absolute magnitude of +6.68.[6]

Properties

[edit]

HD 63454 has a stellar classification of K3 V(k),[3] indicating that it is a K-type main-sequence star with some infilling of the calcium K and H lines.[14] It has 79% the mass of the Sun[7] and 80% the Sun's radius.[8] It radiates 28.7% the luminosity of the Sun[1] from its photosphere at an effective temperature of 4,840 K,[9] giving it an orange hue. HD 63454 has a solar metallicity[10] and is estimated to 1.52 billion years old,[7] a third the age of the Sun. It spins modestly with a projected rotational velocity of 2.6 km/s.[11]

Planetary system

[edit]

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.[5]

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.[15]

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.[16] 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",[17] organized in Uruguay, to name HD 63454 and HD 63454 b.


The HD 63454 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
Ibirapitá ≥0.25±0.01[18] MJ 0.036[5] 2.818049±0.000071[19] 0.0[5] — ~1.10[19] RJ

See also

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References

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  1. ^ a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b c Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. ^ a b Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2 June 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. eISSN 1538-3881. ISSN 0004-6256.
  4. ^ Paunzen, E. (May 2022). "Catalogue of stars measured in the Geneva seven-colour photometric system". Astronomy & Astrophysics. 661: A89. arXiv:2111.04810. Bibcode:2022A&A...661A..89P. doi:10.1051/0004-6361/202142355. eISSN 1432-0746. ISSN 0004-6361.
  5. ^ a b c d e Moutou, C.; Mayor, M.; Bouchy, F.; Lovis, C.; Pepe, F.; Queloz, D.; Santos, N. C.; Udry, S.; Benz, W.; Lo Curto, G.; Naef, D.; Ségransan, D.; Sivan, J.-P. (22 July 2005). "The HARPS search for southern extra-solar planets. IV. Three close-in planets around HD 2638, HD 27894 and HD 63454". Astronomy & Astrophysics. 439 (1): 367–373. Bibcode:2005A&A...439..367M. doi:10.1051/0004-6361:20052826. eISSN 1432-0746. ISSN 0004-6361.
  6. ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  7. ^ a b c d Demarque, Pierre; Woo, Jong‐Hak; Kim, Yong‐Cheol; Yi, Sukyoung K. (December 2004). "Y2 Isochrones with an Improved Core Overshoot Treatment". The Astrophysical Journal Supplement Series. 155 (2): 667–674. arXiv:astro-ph/0409024. Bibcode:2004ApJS..155..667D. doi:10.1086/424966. eISSN 1538-4365. ISSN 0067-0049.
  8. ^ a b Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.
  9. ^ a b c Sousa, S. G.; Santos, N. C.; Mayor, M.; Udry, S.; Casagrande, L.; Israelian, G.; Pepe, F.; Queloz, D.; Monteiro, M. J. P. F. G. (4 June 2008). "Spectroscopic parameters for 451 stars in the HARPS GTO planet search program". Astronomy & Astrophysics. 487 (1): 373–381. arXiv:0805.4826. Bibcode:2008A&A...487..373S. doi:10.1051/0004-6361:200809698. eISSN 1432-0746. ISSN 0004-6361.
  10. ^ a b Ramírez, I.; Fish, J. R.; Lambert, D. L.; Allende Prieto, C. (13 August 2012). "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets". The Astrophysical Journal. 756 (1): 46. arXiv:1207.0499. Bibcode:2012ApJ...756...46R. doi:10.1088/0004-637X/756/1/46. eISSN 1538-4357. ISSN 0004-637X.
  11. ^ a b Soto, M. G.; Jenkins, J. S. (July 2018). "Spectroscopic Parameters and Atmospheric Chemistries of Stars (SPECIES). I. Code description and dwarf stars catalogue". Astronomy & Astrophysics. 615: A76. arXiv:1801.09698. Bibcode:2018A&A...615A..76S. doi:10.1051/0004-6361/201731533. eISSN 1432-0746. ISSN 0004-6361.
  12. ^ "HD 63454". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 January 2023.
  13. ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711.
  14. ^ Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Robinson, P. E. (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I". The Astronomical Journal. 126 (4): 2048. arXiv:astro-ph/0308182. Bibcode:2003AJ....126.2048G. doi:10.1086/378365. S2CID 119417105.
  15. ^ "IAU100 NameExoWorlds: Approved names".
  16. ^ "IAU100 NameExoWorlds National campaigns".
  17. ^ "Nombra Tu Exoplaneta Uruguay". 17 December 2019.
  18. ^ Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (3 March 2017). "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes". The Astronomical Journal. 153 (3): 136. arXiv:1609.04389. Bibcode:2017AJ....153..136S. doi:10.3847/1538-3881/aa5df3. eISSN 1538-3881.
  19. ^ a b Kane, Stephen R.; Dragomir, Diana; Ciardi, David R.; Lee, Jae-Woo; Lo Curto, Gaspare; Lovis, Christophe; Naef, Dominique; Mahadevan, Suvrath; Pilyavsky, Genady; Udry, Stephane; Wang, Xuesong; Wright, Jason (3 August 2011). "Stellar Variability of the Exoplanet Hosting Star HD 63454". The Astrophysical Journal. 737 (2): 58. arXiv:1105.6131. Bibcode:2011ApJ...737...58K. doi:10.1088/0004-637X/737/2/58. eISSN 1538-4357. ISSN 0004-637X.
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