I think in a 3D simulation, the initial fragments would have various trajectories in 3D space, and their orbits would intersect back in the original plane as th

I think in a 3D simulation, the initial fragments would have various trajectories in 3D space, and their orbits would intersect back in the original plane as they pass through it in different directions. (Unless you meant unrolling the center-of-the-orbit as a line, then the fragmentation expands that as a plane? Not sure on the implications of that.)