Complex spin state of the secondary at the moment of secondary fission for Moshup simulations. The horizontal bars indicate the values of the secondary’s moments of inertia. The spin states cluster about the intermediate axis, indicating non-principal axis rotation at the time of fission. The x-axis provides both the effective spin rate and effective spin period, with the rate above and the period below in parentheses. The dynamic inertia is normalized by the mass-equivalent sphere inertia and the effective spin period is normalized by 2.33 hr, the disruption period of a 2 g cm⁻³ object.