Video observations of tiny near-Earth objects with Tomo-e Gozen

Abstract We report the results of video observations tiny (diameter less than 100 m) near-Earth objects (NEOs) with Tomo-e Gozen on Kiso 105 cm Schmidt telescope. The rotational period a asteroid reflects its dynamical history and physical properties since smaller are sensitive to Yarkovsky–O’Keefe–Radzievskii–Paddack (YORP) effect. carried out 60 NEOs at 2 fps from 2018 2021 successfully derived periods axial ratios 32 including 13 fast rotators s. fastest rotator found during our survey is 2020 HS$_\mathsf {7}$ 2.99 statistically confirmed that there certain number in NEO population, which have been missed all previous surveys. discovered distribution diameter (D–P) diagram truncated around 10 truncation flat-top shape not explained well by either realistic tensile strength or suppression YORP meteoroid impacts. propose dependence tangential effect potentially explains observed pattern D–P diagram.