An asteroid Toutatis. Cycle is 5.41 days and 7.35 days.

On the same axis, there are three discs. The first is rotating clockwise, the second is rotating counterclockwise and the third is at a standstill. Centrifugal force of the first and the second is the same, and that of the third is zero. How does Mach's bucket insist ?

From viewpoint of kinetic energy, rotary motion will be absolute.