astro.wikisort.org - Star
HD 23127 is a star in the southern constellation of Reticulum. With an apparent visual magnitude of +8.58[4] 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.[4] It has an absolute magnitude of 3.62.[4]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Reticulum |
| Right ascension | 03h 39m 23.63799s[1] |
| Declination | −60° 04′ 40.2386″[1] |
| Apparent magnitude (V) | +8.576±0.002[2] |
| Characteristics | |
| Spectral type | G2V[3] |
| B−V color index | 0.701±0.013[2] |
| Astrometry | |
| Radial velocity (Rv) | +21.9±1.7[4] km/s |
| Proper motion (μ) | RA: 73.621±0.042[1] mas/yr Dec.: 142.847±0.045[1] mas/yr |
| Parallax (π) | 10.6258 ± 0.0232 mas[1] |
| Distance | 306.9 ± 0.7 ly (94.1 ± 0.2 pc) |
| Absolute magnitude (MV) | 3.62[4] |
| Details[2] | |
| Mass | 1.208±0.045 M☉ |
| Radius | 1.490±0.104 R☉ |
| Luminosity | 3.01±0.03[5] L☉ |
| Surface gravity (log g) | 4.146±0.054 cgs |
| Temperature | 5,843±52 K |
| Metallicity [Fe/H] | 0.29±0.03 dex |
| Rotation | ~33 days |
| Age | 4.508±0.788 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a G-type main-sequence star with a stellar classification of G2V,[3] 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;[2] 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.[7] 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.[2]
| 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
- List of extrasolar planets
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". The Extrasolar Planets Encyclopedia.
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На других языках
[de] HD 23127
HD 23127 ist ein etwa 322 Lichtjahre entfernter Hauptreihenstern im Sternbild Reticulum. Er besitzt eine scheinbare Helligkeit von 8,6 mag.- [en] HD 23127
[ru] HD 23127
HD 23127 — звезда в созвездии Сетки на расстоянии около 320 светового года от нас. Вокруг звезды обращается, как минимум, одна планета.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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