HD 133131
HD 133131 is a binary star in the constellation of Libra. It is roughly 168 light-years (51.5 parsecs) away from the Sun. It consists of two G-type main-sequence stars; 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 |
| Declination | −27° 50′ 27.5520″ |
| Apparent magnitude (V) | 8.40 + 8.42 |
| Characteristics | |
| Spectral type | G2 + G2 |
| B−V color index | 0.622 |
| 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 |
| Distance | 168 ± 1 ly (51.5 ± 0.3 pc) |
| Orbit | |
| Period (P) | ~4240 yr |
| Details | |
| 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 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 Gyr |
| Other designations | |
| HD 133131 A: CD−27 10194A, Gaia DR2 6224633983987510528, SAO 183128, TYC 6756-1541-1, 2MASS J15033543-2750330 | |
| HD 133131 B: CD−27 10194B, Gaia DR2 6224633983987511552, SAO 183129, TYC 6756-867-1, 2MASS J15033579-2750273 | |
| 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.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.