HD 138573
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 32m 43.65s[1] |
| Declination | +10° 58′ 05.9″[1] |
| Apparent magnitude (V) | 7.215 |
| Characteristics | |
| Spectral type | G5& IV-V[2] |
| B−V color index | 0.656[3] |
| Astrometry | |
| Distance | 30.24[3] pc |
| Absolute magnitude (MV) | 4.82[3] |
| Details[3] | |
| 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 100.8 light-years from Earth (30.912 parsecs).[1][2] 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 of a 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.[4]
Mahdi et al. (2016) named the star the best solar twin candidate out of their dataset of around 2,800 candidates.[3]
See also
Sun comparison
The 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
|
[5]
|
| HD 138573 [6]
|
15h 32m 43.7s | +10° 58′ 06″
− |
101
− |
G5IV-V
− |
5,689
− |
−0.10
− |
5.6
− |
[2]
− |
References
- ↑ 1.0 1.1 1.2 "HD 138573". sky-map.org. 2004. Retrieved 2016-06-23.
- ↑ 2.0 2.1 2.2 "HD 138573". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-06-23.
- ↑ 3.0 3.1 3.2 3.3 3.4 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. Unknown parameter
|s2cid=ignored (help) - ↑ 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. Unknown parameter
|s2cid=ignored (help) - ↑ Williams, D.R. (2004). "Sun Fact Sheet". NASA. Archived from the original on 2010-07-15. Retrieved 2009-06-23.
- ↑ HD 138573 at SIMBAD - Ids - Bibliography - Image.
Coordinates: 
15h 32m 43.65s, +10° 58′ 05.8″
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