HD 138573 is a G-type main-sequence star in the constellation Serpens, class G5IV-V, roughly from Earth. This is a solar twin, with nearly the same characteristics of the Sun. It is more active than the Sun.
Mahdi et al. (2016) named the star the best solar twin candidate out of their dataset of around 2,800 candidates.
Sun comparison Chart compares the Sun to HD 138573.
Identifier J2000 Coordinates Distance(ly) StellarClass Temperature(K) Metallicity(dex) Age(Gyr) Notes Right ascension Declination Sun — — 0.00 G2V 5,778 +0.00 4.6 HD 138573 98 G5IV-V 5,740 6.5
See also HD 192699 HD 210702
References