HD 63454
Template:Short description Template:Use dmy dates
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 9.36±0.02[2] |
| Characteristics | |
| Spectral type | K3 V(k)[3] |
| U−B Template:Engvar | +0.98[4] |
| B−V Template:Engvar | +1.06[2] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[1] 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] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +6.68[5] |
| Details | |
| Mass | 0.79[6] Template:Solar mass |
| Radius | 0.80±0.04[7] Template:Solar radius |
| Luminosity | 0.287±0.005[1] Template:Solar luminosity |
| Surface gravity (log g) | 4.52±0.16[8] cgs |
| Temperature | 4,840±66[8] K |
| Metallicity [Fe/H] | 0.00±0.06[9] dex |
| Rotational velocity (v sin i) | 2.6[10] km/s |
| Age | 1.52[6] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[11] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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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 Script error: No such module "val"..[12] 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.[5]
Properties
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[6] and 80% the Sun's radius.[7] It radiates 28.7% the luminosity of the Sun[1] from its photosphere at an effective temperature of Script error: No such module "val".,[8] giving it an orange hue. HD 63454 has a solar metallicity[9] and is estimated to 1.52 billion years old,[6] a third the age of the Sun. It spins modestly with a projected rotational velocity of Script error: No such module "val"..[10]
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.[12]
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.
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See also
References
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External links
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