Funny enough, all the things that attach to you don't actually calculate anything for their animations. Each object just has a set of frames showing it at different angles, and they play that animation at roughly the same speed as the ball's speed, but it's not exact, just "close enough" to give the right impression haha! As for making them actually move in a ball, they just attach to a unity gameobject that's rotating on its x axis and to keep that relative angular distance, with some code to make sure their sprite always faces the camera so they don't distort.