HD 23127
HD 23127 is a star in the southern constellation of Reticulum. With an apparent visual magnitude of +8.58 it is not visible to the naked eye, but can be viewed with a good pair of binoculars. The star is located at a distance of 307 light years from the Sun based on parallax, and is drifting further away with a radial velocity of ~22 km/s. It has an absolute magnitude of 3.62.
This is a G-type main-sequence star with a stellar classification of G2V, which means it is generating energy through core hydrogen fusion. HD 23127 is more massive than the Sun at 1.21 solar masses and has a 49% larger radius. It is metal-rich, having nearly double the abundance of iron in its atmosphere compared to the Sun. This star has an age of 4.5 billion years; about the same as the Sun.
On Friday, February 9, 2007, a 3.32 years period jovian planet was found by using the wobble method by O'Toole and colleagues in Australia. It has minimum mass 53% greater than Jupiter and orbits with a 41% eccentricity. The maximum stable period for a hypothetical inner planet is 322.1 days.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥1.527+0.037 −0.038 MJ |
2.370±0.032 | 1,211.17+11.11 −8.91 |
0.406+0.083 −0.09 |
— | — |
See also
References
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Barbato, D.; et al. (August 2018). "Exploring the realm of scaled solar system analogues with HARPS". Astronomy & Astrophysics. 615: 21. arXiv:1804.08329. Bibcode:2018A&A...615A.175B. doi:10.1051/0004-6361/201832791. S2CID 119099721. A175.
- ^ Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
- ^ 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.
- ^ Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
- ^ "HD 23127". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-15.
- ^ O'Toole, Simon J.; et al. (2007). "New Planets around Three G Dwarfs". The Astrophysical Journal. 660 (2): 1636–1641. arXiv:astro-ph/0702213. Bibcode:2007ApJ...660.1636O. doi:10.1086/513563.
External links
- "HD 23127". Extrasolar Planets Encyclopaedia. Archived from the original on August 11, 2007.
