Fig. 4
Preliminary fit for the orbit (triangles: same dates as in Fig. 1 in blue and red plus 2004.6 and 2006.2 in green). The primary Aa is at the origin, The different positions of the secondary Ab between 1996 and 2013 are represented with crosses, and are the same as in Fig. 1. The figure shows the projection of the preliminary orbit in the plane of the sky.
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