HD 63454

HD 63454, now known as "Ceibo" is a ninth magnitude K-type main sequence star located approximately 117 light-years 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.

HD 63454
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Chamaeleon
Right ascension  07h 39m 21.851s[1]
Declination −78° 16′ 44.31″[1]
Apparent magnitude (V) 9.40
Characteristics
Spectral type K4V
Astrometry
Proper motion (μ) RA: −20.82 ± 0.85[1] mas/yr
Dec.: −40.64 ± 0.94[1] mas/yr
Parallax (π)28.95 ± 0.81[1] mas
Distance113 ± 3 ly
(34.5 ± 1.0 pc)
Details
Mass0.79 ± 0.02[2] M☉
Radius0.72 ± 0.01[2] R☉
Luminosity0.242 ± 0.003[2] L☉
Surface gravity (log g)4.62 ± 0.02[2] cgs
Temperature4788 ± 20[2] K
Age2.7 ± 3.3[2] Gyr
Other designations
Ceibo, CD−77°298, HIP 37284
Database references
SIMBADdata

Planetary system

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.[3]

After the 2019 IAU100 NameExoWorlds campaign, the International Astronomical Union, approved the names proposed from Uruguay: Ceibo (Erythrina crista-galli) for the star and Ibirapitá (Peltophorum dubium) for the exoplanet.[4] They are "Culturally significant species of trees native to Uruguay." Ceibo is the name of the native tree of Uruguay that gives rise to the national flower." And Ibirapitá is the name of a native tree that is characteristic of the country of Uruguay, and is also known as Artigas' tree, after the national hero.

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[5]. 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"[6], organized in Uruguay, to name HD 63454 and HD 63454 b.


The HD 63454 planetary system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >0.38 MJ 0.036 2.817822 ± 0.000095 0 — —
gollark: Of the political 5-cube, or what?
gollark: Idea: political 5-cube using auth/lib, left/right, prog/con, and the metacompass axes.
gollark: Also, it should be the "political metacompass".
gollark: > 3-character indentation using SPACES in Lua sources: It makes rogue TABS easier to see, and lines up nicely with 'if' and 'end' keywords.accursed.
gollark: Since many political beliefs are correlated.

See also
  • List of extrasolar planets

References
  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
  3. Moutou, C.; et al. (2005). "The HARPS search for southern extra-solar planets IV. Three close-in planets around HD 2638, HD 27894 and HD 63454". Astronomy and Astrophysics. 439 (1): 367–373. arXiv:1411.7048. Bibcode:2005A&A...439..367M. doi:10.1051/0004-6361:20052826.
  4. "IAU100 NameExoWorlds: Approved names".
  5. "IAU100 NameExoWorlds National campaigns".
  6. "Nombra Tu Exoplaneta Uruguay".


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