HD 114729
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 13h 12m 44.259s[1] |
| Declination | –31° 52′ 24.06″[1] |
| Apparent magnitude (V) | 6.68[2] |
| Characteristics | |
| Spectral type | G0 V[3] |
| B−V color index | 0.591±0.008[2] |
| Astrometry | |
| Radial velocity (Rv) | 26.3378±0.0187[4] km/s |
| Proper motion (μ) | RA: −199.927 mas/yr[1] Dec.: −308.130 mas/yr[1] |
| Parallax (π) | 26.3378 ± 0.0187 mas[5] |
| Distance | 123.84 ± 0.09 ly (37.97 ± 0.03 pc) |
| Absolute magnitude (MV) | 3.89[2] |
| Details[6] | |
| 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[7] dex |
| Age | 9.30±0.60 Gyr |
| HD 114729 B | |
| Mass | 0.253±0.011[8] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 114729 is a Sun-like star with an orbiting exoplanet in the southern constellation of Centaurus. Based on parallax measurements, it is located at a distance of 124 light years from the Sun. It is near the lower limit of visibility to the naked eye, having an apparent visual magnitude of 6.68[2] The system is drifting further away with a heliocentric radial velocity of 26.3 km/s.[4] The system has a relatively high proper motion, traversing the celestial sphere at an angular rate of 0.373″·yr−1.[10]
The spectrum of HD 114729 presents as an ordinary G-type main-sequence star, a yellow dwarf, with a stellar classification of G0 V.[3] It has a negligible level of magnetic activity, making it chromosperically quiet.[11] The star has about the same mass as the Sun, but the radius has expanded to 44% greater than the Sun's girth. It is radiating more than double the luminosity of the Sun from its photosphere at an effective temperature of 5,939 K. The size and luminosity suggest a much greater age than the Sun; perhaps around nine billion years.[6]
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.[8]
Planetary system
[edit]In 2003 the California and Carnegie Planet Search team announced the discovery of a planet orbiting the star.[11] 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
[edit]References
[edit]- ^ a b c 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 d 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.
- ^ a b Gray, R. O.; et al. (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.
- ^ a b Soubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv:1804.09370. Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID 52952408.
- ^ 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.
- ^ a b Bonfanti, A.; et al. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: A5. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297. S2CID 53971692.
- ^ Barry, Don C.; et al. (2016). "HD 114729". Open Oxoplanet Catalogue. 315: 264. Bibcode:1987ApJ...315..264B. doi:10.1086/165131.
- ^ a b Mugrauer, M.; et al. (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.
- ^ Luyten, W. J. (June 1995). "NLTT Catalogue (Luyten, 1979)". VizieR Online Data Catalog. Bibcode:1995yCat.1098....0L.
- ^ a b 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. S2CID 17608922.
- ^ 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
[edit]- "HD 114729". Extrasolar Planets Encyclopaedia. Archived from the original on November 6, 2007.
