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
Evolutionary stage	Main sequence [1]
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
Mass	0.98±0.01 [5]   M☉
Radius	1.038±0.021 [1]   R☉
Luminosity	0.994±0.005 [1]   L☉
Surface gravity (log g)	4.41±0.01 [5]   cgs
Temperature	5,740±3 [5]   K
Metallicity [Fe/H]	−0.024±0.003 [5]   dex
Rotational velocity (v sin i)	1.30 [6]  km/s
Age	6.50+0.29 −0.42 [5]   Gyr
Other designations
BD+11 2816, HD 138573, HIP 76114, SAO 101603 [7]
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] It is more active than the Sun. ^[8]

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	5,740	−0.024	6.5	[7] [5] [1]

See also

• HD 192699
• HD 210702

References

1. 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. 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. 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. Martos, Giulia; Meléndez, Jorge; Rathsam, Anne; Carvalho-Silva, Gabriela (2023-04-21). "Metallicity and age effects on lithium depletion in solar analogues". Monthly Notices of the Royal Astronomical Society. 522 (3): 3217–3226. arXiv: 2305.01861 . Bibcode:2023MNRAS.522.3217M. doi: 10.1093/mnras/stad1177 . ISSN   0035-8711.
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. "HD 138573". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2016-06-23.
8. 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.
9. Williams, D.R. (2004). "Sun Fact Sheet". NASA . Retrieved 2009-06-23.