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.
| 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 |
| Distance | 113 ± 3 ly (34.5 ± 1.0 pc) |
| Details | |
| Mass | 0.79 ± 0.02[2] M☉ |
| Radius | 0.72 ± 0.01[2] R☉ |
| Luminosity | 0.242 ± 0.003[2] L☉ |
| Surface gravity (log g) | 4.62 ± 0.02[2] cgs |
| Temperature | 4788 ± 20[2] K |
| Age | 2.7 ± 3.3[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.
| 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 | — | — |
See also
- List of extrasolar planets
References
- 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
- 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.
- 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.
- "IAU100 NameExoWorlds: Approved names".
- "IAU100 NameExoWorlds National campaigns".
- "Nombra Tu Exoplaneta Uruguay".
External links
- "Notes for star HD 63454". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-22.
