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] | |
| Luminosity | 1.10[2] L☉ |
| Surface gravity (log g) | 4.42±0.01 cgs |
| Temperature | 5,757±10 K |
| Metallicity | 0.00±0.01 |
| 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.[5] Though a G-type star like the Sun, a 2005 study found that it is not a solar twin as HD 138573 has a much lower mass, lower metallicity, and is much older age than the Sun at 5.6 billion years old. HD 138573 is otherwise close to the Sun's characteristics and could be classed as a Solar analog.[6]
Mahdi et al. (2016) named the star the best solar twin candidate out of their dataset of around 2,800 candidates.[4]
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 | [7] |
| HD 138573 | 15h 32m 43.7s | +10° 58′ 06″ | 98 | G5IV-V | 5,757 | +0.00 | 7.1 | [5][4] |
See also
References
- ^ 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 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 c "HD 138573". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-06-23.
- ^ Datson, Juliet; Flynn, Chris; Portinari, Laura (2012). "New solar twins and the metallicity and temperature scales of the Geneva Copenhagen Survey". Monthly Notices of the Royal Astronomical Society. 426 (426): 484. arXiv:1207.4610. Bibcode:2012MNRAS.426..484D. doi:10.1111/j.1365-2966.2012.21730.x. S2CID 118378819.
- ^ Williams, D.R. (2004). "Sun Fact Sheet". NASA. Retrieved 2009-06-23.
