HD 129357
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 41m 22.390s[1] |
| Declination | +29° 03′ 31.80″[1] |
| Apparent magnitude (V) | 7.823[2] |
| Characteristics | |
| Spectral type | G2V[3] |
| U−B color index | +0.115[3] |
| B−V color index | +0.635[3] |
| Astrometry | |
| Radial velocity (Rv) | −33.2[2] km/s |
| Proper motion (μ) | RA: +11.76[4] mas/yr Dec.: −183.50[4] mas/yr |
| Parallax (π) | 21.22 ± 1.02[4] mas |
| Distance | 154 ± 7 ly (47 ± 2 pc) |
| Details | |
| Mass | 1.00 ± 0.06[5] M☉ |
| Surface gravity (log g) | 4.16 ± 0.13[5] cgs |
| Temperature | 5,749 ± 47[5] K |
| Metallicity | [Fe/H] = −0.02 ± 0.04[5] |
| Rotational velocity (v sin i) | ≤ 2.5[5] km/s |
| Age | 8.1[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 129357 is a star in the constellation Boötes that is located about 154 light years from the Sun. The measured properties of this star are very similar to those of the Sun, making it a candidate solar twin. However, it has a lower abundance of lithium than the Sun and appears over 3 billion years older, so it may instead be a solar analog. It was suggested by astronomer Olin Eggen that this star is a member of the Wolf 630 moving group of stars that share a common motion through space. The space velocity components of HD 129357 are (U, V, W) = (+21.3, −36.3, −32.0).[5]
References
- ↑ 1.0 1.1 Høg, E.; et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode:2000A&A...355L..27H.
- ↑ 2.0 2.1 2.2 Nortdstrom, R.; et al. "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ~14000 F and G dwarfs". Astronomy and Astrophysics 418: 989–1019. arXiv:astro-ph/0405198. Bibcode:2004A&A...418..989N. doi:10.1051/0004-6361:20035959.
- ↑ 3.0 3.1 3.2 3.3 "HD 129357 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2011-01-21.
- ↑ 4.0 4.1 4.2 Perryman, M. A. C.; et al. (July 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics 323: L49–L52. Bibcode:1997A&A...323L..49P.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 King, Jeremy R.; Boesgaard, Ann M.; Schuler, Simon C. (November 2005). "Keck HIRES Spectroscopy of Four Candidate Solar Twins". The Astronomical Journal 130 (5): 2318–2325. arXiv:astro-ph/0508004. Bibcode:2005AJ....130.2318K. doi:10.1086/452640.
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