astro.wikisort.org - StarHD 114729 is a 7th magnitude star approximately 118 ly (36.1 pc) away in the constellation of Centaurus. Like the Sun (G2V), it is a yellow dwarf (spectral type G0V). It is about the same mass as the Sun, but twice as luminous. That indicates a much greater age, perhaps over 10 billion years. HD 114729 has a co-moving companion designated HD 114729 B, with the latter having 25.3% of the Sun's mass and a projected separation of 282±10 AU.[6]
G-type main sequence star in the constellation Centaurus
HD 114729
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Centaurus |
Right ascension |
13h 12m 44.25696s[1] |
Declination |
–31° 52′ 24.0555″[1] |
Apparent magnitude (V) |
6.68[2] |
Characteristics |
Spectral type |
G0 V[3] |
B−V color index |
0.591±0.008[2] |
Astrometry |
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Proper motion (μ) | RA: −202.87[1] mas/yr Dec.: −308.32[1] mas/yr |
Parallax (π) | 27.69 ± 0.54 mas[1] |
Distance | 118 ± 2 ly (36.1 ± 0.7 pc) |
Absolute magnitude (MV) | 3.89[2] |
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Details[4] |
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HD 114729 A |
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Mass | 0.97±0.01 M☉ |
Radius | 1.44±0.03 R☉ |
Luminosity | 2.33±0.02 L☉ |
Surface gravity (log g) | 4.10±0.02 cgs |
Temperature | 5,939±58 K |
Metallicity [Fe/H] | −0.220[5] dex |
Age | 9.30±0.60 Gyr |
HD 114729 B |
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Mass | 0.253±0.011[6] M☉ |
Other designations |
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CD−31° 10156, HD 114729, HIP 64459, SAO 204237, WDS J13127-3152A[7] |
Database references |
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SIMBAD | data |
Planetary system
In 2003 the California and Carnegie Planet Search team announced the discovery of a planet orbiting the star.[8] This planet orbits twice as far away from the star as Earth to the Sun and orbits very eccentrically. It has mass at least 95% (0.840) that of Jupiter and thus a minimum of 267 times the mass of Earth.
The HD 114729 planetary system[9]
Companion (in order from star) |
Mass |
Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
Inclination |
Radius |
b |
>0.95 ± 0.10 MJ |
2.11 ± 0.12 |
1114 ± 15 |
0.167 ± 0.055 |
— |
— |
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, S2CID 18759600.
- Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- 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. (July 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. S2CID 119476992.
- Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: A5, 14 pp. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297. S2CID 53971692.
- Barry, Don C.; Cromwell, Richard H.; Hege, E. Keith (2016), "HD 114729", Open Oxoplanet Catalogue, 315: 264, Bibcode:1987ApJ...315..264B, doi:10.1086/165131
- Mugrauer, M.; Neuhäuser, R.; Seifahrt, A.; Mazeh, T.; Guenther, E. (September 2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics. 440 (3): 1051−1060. arXiv:astro-ph/0507101. Bibcode:2005A&A...440.1051M. doi:10.1051/0004-6361:20042297. S2CID 14065040.
- "HD 114729". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-06-25.
- Butler, R. Paul; et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal. 582 (1): 455–466. Bibcode:2003ApJ...582..455B. CiteSeerX 10.1.1.7.6988. doi:10.1086/344570.
- Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. hdl:2299/1103. S2CID 119067572.
External links
Constellation of Centaurus |
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На других языках
[de] HD 114729
HD 114729 ist ein 118 Lichtjahre von der Erde entfernter Gelber Zwerg mit einer Rektaszension von 13h 12m 44s und einer Deklination von −31° 52' 24". Er besitzt eine scheinbare Helligkeit von 6,7 mag. Im Jahre 2003 entdeckte Paul Butler einen extrasolaren Planeten, der diesen Stern umkreist. Dieser trägt den Namen HD 114729 b.
- [en] HD 114729
[ru] HD 114729
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