The visual orbit of δ Sco. The gray circles are binary separations taken from the Fourth Catalog of Interferometric Measurements of Binary Star, the blue ones from Tycner et al. (2011) and the red ones are our new measurements derived from our VLTI/AMBER data. The green and blue solid lines represent the orbits derived by Tango et al. (2009) and Tycner et al. (2011), respectively. Our best-fit orbit is plotted as an orange solid line.