astro.wikisort.org - Star
HD 133131 is a binary star in the constellation of Libra. It is roughly 168 light-years (51.5 parsecs) away from the Sun.[2] It consists of two G-type main-sequence stars;[2] neither are bright enough to be seen with the naked eye.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Libra |
| Right ascension | 15h 03m 35.80651s[1] |
| Declination | −27° 50′ 27.5520″[1] |
| Apparent magnitude (V) | 8.40 + 8.42[2] |
| Characteristics | |
| Spectral type | G2 + G2[2] |
| B−V color index | 0.622[3] |
| Astrometry | |
| Radial velocity (Rv) | -16.30 km/s |
| Proper motion (μ) | RA: 156.88 mas/yr Dec.: -136.07 mas/yr |
| Parallax (π) | 19.4 ± 0.12 mas[4][5][6] |
| Distance | 168 ± 1 ly (51.5 ± 0.3 pc) |
| Orbit[2] | |
| Period (P) | ~4240 yr |
| Details[2] | |
| HD 133131 A | |
| Mass | 0.95 M☉ |
| Surface gravity (log g) | 4.39 ± 0.050 cgs |
| Temperature | 5799 ± 19 K |
| Metallicity [Fe/H] | −0.306 ± 0.016 dex |
| Age | 6.3[3] Gyr |
| HD 133131 B | |
| Mass | 0.93 M☉ |
| Surface gravity (log g) | 4.41 ± 0.045 cgs |
| Temperature | 5805 ± 15 K |
| Metallicity [Fe/H] | −0.281 ± 0.013 dex |
| Age | 5.9[3] Gyr |
| Other designations | |
| HD 133131 A: CD−27 10194A, Gaia DR2 6224633983987510528, SAO 183128, TYC 6756-1541-1, 2MASS J15033543-2750330[5] | |
| HD 133131 B: CD−27 10194B, Gaia DR2 6224633983987511552, SAO 183129, TYC 6756-867-1, 2MASS J15033579-2750273[6] | |
| Database references | |
| SIMBAD | HD 133131 |
| HD 133131 A | |
| HD 133131 B | |
Both components, HD 133131 A and B, are very similar to the Sun but are far older, about 6 billion years old. They also have low metallicities (50% of solar abundance), and HD 133131 A is additionally depleted in heavy elements compared to HD 133131 B, indicating a possibly past planetary engulfment event for HD 133131 B.[7]
Planetary system
In 2016 two planets orbiting HD 133131 A and one planet orbiting HD 133131 B were discovered utilizing the radial velocity method.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥1.43 MJ | 1.44 | 649 | 0.32 | — | — |
| c | ≥0.63 MJ | 4.79 | 3925 | 0.20 | — | — |
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.50 MJ | 6.40 | 6119 | 0.62 | — | — |
References
- van Leeuwen, F.; et al. (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.
- Teske, Johanna K; Shectman, Stephen A; Vogt, Steve S; Díaz, Matías; Butler, R. Paul; Crane, Jeffrey D; Thompson, Ian B; Arriagada, Pamela (2016). "The Magellan PFS Planet Search Program: Radial Velocity and Stellar Abundance Analyses of the 360 AU, Metal-Poor Binary "Twins" HD 133131A & B". The Astronomical Journal. 152 (6): 167. arXiv:1608.06216. Bibcode:2016AJ....152..167T. doi:10.3847/0004-6256/152/6/167. S2CID 118852162.
- Arriagada, Pamela (2011), "Chromospheric Activity of Southern Stars from the Magellan Planet Search Program", The Astrophysical Journal, 734 (1): 70, arXiv:1104.3186, Bibcode:2011ApJ...734...70A, doi:10.1088/0004-637X/734/1/70, S2CID 118384591
- "HD 133131". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 September 2020.
- "HD 133131 A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 September 2020.
- "HD 133131 B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 September 2020.
- Oh, Semyeong; Price-Whelan, Adrian M.; Brewer, John M.; Hogg, David W.; Spergel, David N.; Myles, Justin (2017), "Kronos and Krios: Evidence for Accretion of a Massive, Rocky Planetary System in a Comoving Pair of Solar-type Stars", The Astrophysical Journal, 854 (2): 138, arXiv:1709.05344, doi:10.3847/1538-4357/aaab4d, S2CID 119076217
Constellation of Libra | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||
| Stars |
| ||||||||||||
| |||||||||||||
| |||||||||||||
| Galaxies |
| ||||||||||||
 Category | |||||||||||||
 | This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it. |
 | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |
На других языках
- [en] HD 133131
[ru] HD 133131
HD 133131 — двойная звезда в созвездии Весов. Другие обозначения — CPD−27° 5116, HIP 73674. Находится на расстоянии 153 световых лет (47 парсек) от Солнца[9]. Это первая двойная звёздная система, в которой планеты обнаружены и у основной звезды, и у звезды-компаньона.Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.
Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
2019-2025
WikiSort.org - проект по пересортировке и дополнению контента Википедии
WikiSort.org - проект по пересортировке и дополнению контента Википедии