  For more than a decade, 18 Sco (HD 146233) has been considered the star that
most closely resembles the Sun, even though significant differences such as its
Li content, which is about three times solar, exist. Using high resolution,
high S/N spectra obtained at McDonald Observatory, we show that the stars HIP
56948 and HIP 73815 are very similar to the Sun in both stellar parameters and
chemical composition, including a low Li abundance, which was previously
thought to be peculiar in the Sun. HIP 56948, in particular, has stellar
parameters identical to solar within the observational uncertainties, being
thus the best solar twin known to date. HIP 56948 is also similar to the Sun in
its lack of hot Jupiters. Considering the age of this star (1+/-1 Gyr older
than the Sun) and its location and orbit around the Galaxy, if terrestrial
planets exist around it, they may have had enough time to develop complex life,
making it a prime target for SETI.
