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Collins, Keivan G. Stassun, Kevin I. Collins, Knicole D. Colon, Leonardo Vanzi, Martin Paegert, Mat\\'ias R. D\\'iaz, Michelle Kunimoto, Natalie R. Hinkel, Pavel Pintr, Petr Kabath, Rafael Brahm, Richard P. Schwarz, Robert A. Wittenmyer, R. Paul Butler, Sarah Millholland, Sara Seager, Sharon X. Wang, Shubham Kanodia, Simon O'Toole, Steve B. Howell, Steve Shectman, Tansu Daylan, Zifan Lin","submitted_at":"2024-12-12T01:52:12Z","abstract_excerpt":"We report the validation of multiple planets transiting the nearby ($d = 12.8$ pc) K5V dwarf HD 101581 (GJ 435, TOI-6276, TIC 397362481). The system consists of at least two Earth-size planets whose orbits are near a mutual 4:3 mean-motion resonance, HD 101581 b ($R_{p} = 0.956_{-0.061}^{+0.063}~R_{\\oplus}$, $P = 4.47$ days) and HD 101581 c ($R_{p} = 0.990_{-0.070}^{+0.070}~R_{\\oplus}$, $P = 6.21$ days). Both planets were discovered in Sectors 63 and 64 TESS observations and statistically validated with supporting ground-based follow-up. 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