Schematic view of the different configurations of the lobe coupling in the parent 288P. The top and bottom rows present views from directions perpendicular and parallel to the rotation axis, respectively. The elongation of the smaller component B is excessively increased for clarity. Lines a–a and b–b show the maximum cross sections of the lobes A and B in the direction perpendicular to the line that connects their mass centres. Line n–n indicates the cross section of the neck.