HD 138573
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 32m 43.653s[1] |
| Declination | +10° 58′ 05.88″[1] |
| Apparent magnitude (V) | 7.22[2] |
| Characteristics | |
| Spectral type | G5 IV-V[3] |
| B−V color index | 0.656[4] |
| Astrometry | |
| Radial velocity (Rv) | −35.67±0.12[1] km/s |
| Proper motion (μ) | RA: −5.880 mas/yr[1] Dec.: 158.609 mas/yr[1] |
| Parallax (π) | 33.1373 ± 0.0240 mas[1] |
| Distance | 98.43 ± 0.07 ly (30.18 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.82[4] |
| Details[4] | |
| Mass | 0.98[5] M☉ |
| Luminosity | 1.10[2] 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[6] km/s |
| Age | 7.1+4.2 −4.5 Gyr |
| Other designations | |
| 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.[7] This is a solar twin, with nearly the same characteristics of the Sun,[4] and has been described as the second-closest star to the Sun (after 18 Scorpii) in a 2014 publication.[8] It is known to be more active than the Sun.[5]
Mahdi et al. (2016) named the star the best solar twin candidate out of their dataset of around 2,800 candidates.[4]
Sun comparison
[edit]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 | [9] |
| HD 138573 | 15h 32m 43.7s | +10° 58′ 06″ | 98 | G5IV-V | 5,757 | +0.00 | 7.1 | [7][4] |
See also
[edit]References
[edit]- ^ a b c d e 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.
- ^ a b 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.
- ^ a b c d e f 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.
- ^ a b 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.
- ^ a b c "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.
