Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Serpens |
Right ascension | 15 32 43.653 |
Declination | +10° 58′ 05.88″ |
Apparent magnitude (V) | 7.22 |
Characteristics | |
Spectral type | G5 IV-V |
B−V color index | 0.656 |
Astrometry | |
Radial velocity (Rv) | −35.67±0.12 km/s |
Proper motion (μ) | RA: −5.880 mas/yr Dec.: 158.609 mas/yr |
Parallax (π) | 33.1373 ± 0.0240 mas |
Distance | 98.43 ± 0.07 ly (30.18 ± 0.02 pc) |
Absolute magnitude (MV) | 4.82 |
Details | |
Mass | 0.98 M☉ |
Luminosity | 1.10 L☉ |
Surface gravity (log g) | 4.42±0.01 cgs |
Temperature | 5,757±10 K |
Metallicity | 0.00±0.01 |
Rotational velocity (v sin i) | 1.30 km/s |
Age | 7.1+4.2 −4.5 Gyr |
Other designations | |
BD+11 2816, HD 138573, HIP 76114, SAO 101603 | |
Database references | |
SIMBAD | data |
HD 138573 is a G-type main-sequence star in the constellation Serpens, class G5IV-V, roughly 98.4 light-years (30.2 parsecs) from Earth. This is a solar twin, with nearly the same characteristics of the Sun, and has been described as the second-closest star to the Sun (after 18 Scorpii) in a 2014 publication. It is known to be more active than the Sun.
Mahdi et al. (2016) named the star the best solar twin candidate out of their dataset of around 2,800 candidates.
Sun comparison
Chart compares the Sun to HD 138573.
Identifier | J2000 Coordinates | Distance (ly) |
Stellar Class |
Temperature (K) |
Metallicity (dex) |
Age (Gyr) |
Notes | |
---|---|---|---|---|---|---|---|---|
Right ascension | Declination | |||||||
Sun | — | — | 0.00 | G2V | 5,778 | +0.00 | 4.6 | |
HD 138573 | 15 32 43.7 | +10° 58′ 06″ | 98 | G5IV-V | 5,757 | +0.00 | 7.1 |
See also
References
- ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ 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.
- Harlan, E. A. (September 1969). "MK classifications for F- and G-type stars. I". Astronomical Journal. 74: 916. Bibcode:1969AJ.....74..916H. doi:10.1086/110881.
- ^ Mahdi, D.; Soubiran, C.; Blanco-Cuaresma, S.; Chemin, L. (March 2016). "Solar twins in the ELODIE archive". Astronomy & Astrophysics. 587: A131. arXiv:1601.01599. Bibcode:2016A&A...587A.131M. doi:10.1051/0004-6361/201527472. S2CID 119205608.
- ^ Porto de Mello, G. F.; da Silva, R.; da Silva, L.; de Nader, R. V. (March 2014). "A photometric and spectroscopic survey of solar twin stars within 50 parsecs of the Sun. I. Atmospheric parameters and color similarity to the Sun". Astronomy & Astrophysics. 563. id. A52. arXiv:1312.7571. Bibcode:2014A&A...563A..52P. doi:10.1051/0004-6361/201322277.
- Llorente de Andrés, F.; et al. (October 2021). "The evolution of lithium in FGK dwarf stars. The lithium-rotation connection and the Li desert". Astronomy and Astrophysics. 654: A137. arXiv:2108.05852. Bibcode:2021A&A...654A.137L. doi:10.1051/0004-6361/202141339. ISSN 0004-6361.
- ^ "HD 138573". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-06-23.
- Mahdi, D.; Soubiran, C.; Blanco-Cuaresma, S. (January 2014). "Solar twins and siblings in spectroscopic archives". European Astronomical Society Publications Series. 68: 383. Bibcode:2014EAS....67..383M. doi:10.1051/eas/1567078. ISSN 1633-4760.
- Williams, D.R. (2004). "Sun Fact Sheet". NASA. Retrieved 2009-06-23.
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