Comparison of Gaia DR3 inversion solutions for the spin period P and ground-based P determinations for all asteroids of our sample with a pole quality code = 2 (best inversion solutions; top panel). The top right panel shows the same, but for objects with a pole quality code = 1. The bottom panels show the same as the top panels, but for objects with a quality code solution = 0 (corresponding to an unknown pole solution from ground-based data) and for objects with a pole quality code = −1 (corresponding to complete disagreement with any existing ground-based pole solution). The upper line represents periods derived from Gaia DR3 photometry that are exactly twice those obtained from the ground.