Comparison of 288P with the known binary systems from Johnston (2019). Filled circles represent binaries with a primary rotation period T_p < 5 h, open circles represent those with T_p > 5 h, while triangles represent systems with unknown T_p. Grey colourindicates unknown eccentricity. Letters A, B, and W refer to the three main binary populations defined in Pravec & Harris (2007), where group A has small size ratios and fast-rotating primaries, B has doubly synchronous systems with a high size ratio, and W are wide, asynchronous binaries. The vertical dashed line indicates the 34 r_p limit out to which binaries can form directly from rotational fission. The error bars show the solutions obtained in this work and in Agarwal et al. (2017) from visit 1–12 data for comparison. As component radii we used those of volume-equivalent spheres with a 20% uncertainty. This plot has been updated from Fig. 3 in Agarwal et al. (2017).