| 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] |
| Distance | 122.83 ± 0.05
ly (37.66 ± 0.02 pc) |
| Absolute magnitude (MV) | +6.68 [6] |
| Details | |
| Mass | 0.79 [7] M☉ |
| Radius | 0.80±0.04 [8] R☉ |
| Luminosity | 0.287±0.005 [1] L☉ |
| Surface gravity (log g) | 4.52±0.16 [9] cgs |
| Temperature | 4,840±66 [9] K |
| Metallicity [Fe/H] | 0.00±0.06 [10] dex |
| Rotational velocity (v sin i) | 2.6 [11] km/s |
| Age | 1.52 [7] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
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]
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.
| 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 |
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "HD 63454". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 January 2023.
- ^ 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.
- ^ 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.
- ^ "IAU100 NameExoWorlds: Approved names".
- ^ "IAU100 NameExoWorlds National campaigns".
- ^ "Nombra Tu Exoplaneta Uruguay". 17 December 2019.
- ^ 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.
- ^ 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.
- "Notes for star HD 63454". Extrasolar Planets Encyclopaedia. Archived from the original on November 6, 2007. Retrieved 2008-08-22.
| 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] |
| Distance | 122.83 ± 0.05
ly (37.66 ± 0.02 pc) |
| Absolute magnitude (MV) | +6.68 [6] |
| Details | |
| Mass | 0.79 [7] M☉ |
| Radius | 0.80±0.04 [8] R☉ |
| Luminosity | 0.287±0.005 [1] L☉ |
| Surface gravity (log g) | 4.52±0.16 [9] cgs |
| Temperature | 4,840±66 [9] K |
| Metallicity [Fe/H] | 0.00±0.06 [10] dex |
| Rotational velocity (v sin i) | 2.6 [11] km/s |
| Age | 1.52 [7] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
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]
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.
| 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 |
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "HD 63454". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 January 2023.
- ^ 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.
- ^ 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.
- ^ "IAU100 NameExoWorlds: Approved names".
- ^ "IAU100 NameExoWorlds National campaigns".
- ^ "Nombra Tu Exoplaneta Uruguay". 17 December 2019.
- ^ 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.
- ^ 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.
- "Notes for star HD 63454". Extrasolar Planets Encyclopaedia. Archived from the original on November 6, 2007. Retrieved 2008-08-22.