Square of the normalised angular velocity of the 42 asteroids as a function of the aspect ratio c/a and their error bars. Predictions for the Maclaurin ellipsoids are shown in blue and those for the Jacobi ellipsoids in red. All error bars in the paper are at 1 sigma. The c/a = 1 value on the left corresponds to the sphere, and the very flattened objects are on the right. Even taking the large error bars into account, most asteroids are far from the curves of the Maclaurin and Jacobi ellipsoids. In the data published by Vernazza et al. (2021, Table A.1), two asteroids have axes b < c; we consider this to be an exchange of values between b and c.