HD 138573

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]
Distance98.43 ± 0.07 ly
(30.18 ± 0.02 pc)
Absolute magnitude (MV)4.82[4]
Details[4]
Mass0.98[5] M☉
Luminosity1.10[2] L☉
Surface gravity (log g)4.42±0.01 cgs
Temperature5,757±10 K
Metallicity0.00±0.01
Rotational velocity (v sin i)1.30[6] km/s
Age7.1+4.2
−4.5 Gyr
Other designations
BD+11 2816, HD 138573, HIP 76114, SAO 101603[7]
Database references
SIMBADdata

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-most similar 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

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

References

  1. 1 2 3 4 5 6 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.
  2. 1 2 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.
  3. ↑ 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.
  4. 1 2 3 4 5 6 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.
  5. 1 2 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.
  6. ↑ 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.
  7. 1 2 3 "HD 138573". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-06-23.
  8. ↑ 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.
  9. ↑ Williams, D.R. (2004). "Sun Fact Sheet". NASA. Retrieved 2009-06-23.
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