HD 129357

HD 129357 is a G-type 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).^[6]

HD 129357

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 mas[4]
Distance	154 ± 7 ly (47 ± 2 pc)
Absolute magnitude (MV)	+4.49[5]
Details
Mass	1.00 ± 0.06[6] M☉
Surface gravity (log g)	4.16 ± 0.13[6] cgs
Temperature	5,749 ± 47[6] K
Metallicity	[Fe/H] = −0.02 ± 0.04[6]
Rotational velocity (v sin i)	≤ 2.5[6] km/s
Age	8.1[2] Gyr
Other designations
BD+29 2568, HIP 71813, PPM 103504, SAO 83469.[3]
Database references
SIMBAD	data

References

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. doi:10.1888/0333750888/2862.
2. Nortdstrom, R.; et al. (2004). "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. S2CID 11027621.
3. "HD 129357". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2011-01-21.
4. Perryman, M. A. C.; et al. (July 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
5. 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.
6. 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. S2CID 6535115.