Sketch representing the position at which the ejections occurred in the binary orbit, according to the discussion in Sect. 3.3 and the two scenarios presented in Sect. 5 regarding the first ejection. Note that at first we cannot discern the sense of the binary rotation, clock- or counterclock-wise (as seen from the Earth, from the south), and both possibilities are hence represented in this figure. A clockwise rotation is suggested by Corradi et al. (2011) and also by the position-velocity gradient detected in the southernmost part of the outer ring (see Sect. 5.2).