Fuente Marcos, Raúl de laFuente Marcos, Carlos de la2023-06-222023-06-222022-072515-517210.3847/2515-5172%2Fac842bhttps://hdl.handle.net/20.500.14352/71964It is argued that the closest past flyby of a known star to the solar system was that of Scholz's star (WISE J072003.20-084651.2). Here, we show that the distribution of distances of closest approach of this star has a median value of 0.330 pc with a 90% probability of coming within 0.317–0.345 pc of the Sun; the associated time of perihelion passage is determined to be between 78.6–81.1 kyr ago with 90% confidence, with a most likely value of 79.9 kyr. Using Gaia DR3 data and the latest planetary ephemerides, we found that UCAC4 237-008148 (RUWE = 0.927) approached even closer with a median perihelion distance of 0.259 pc and a 90% confidence interval of 0.249–0.269 pc, 1.158 Myr ago. HD 7977 might have passed 0.15 pc from the Sun 2.77 Myr ago, but it has RUWE = 2.015.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttps://doi.org/10.3847/2515-5172%2Fac842bopen access52-33Stellar kinematicsSolar systemAstrofísica (Matemáticas)21 Astronomía y Astrofísica