HD 114729
HD 114729 is a 7th magnitude star approximately 118 ly (36.1 pc) away in the constellation of Centaurus. Like our 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]
| 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 | |
| Proper motion (μ) | RA: −202.87[1] mas/yr Dec.: −308.32[1] mas/yr |
| Parallax (π) | 27.69 ± 0.54[1] mas |
| Distance | 118 ± 2 ly (36.1 ± 0.7 pc) |
| Absolute magnitude (MV) | 3.89[2] |
| Details[4] | |
| HD 114729 A | |
| 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 | |
| Mass | 0.253±0.011[6] M☉ |
| Other designations | |
| Database references | |
| 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.
| 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
- "HD 114729". The Extrasolar Planets Encyclopaedia.
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