Astrometric positions of HD 95086 b relative from A. The predictions for the HD 95086 b in case of a stationary background source are reported in red. SPHERE (pink) and GPI (gray) astrometric observations between 2013 and 2017 are reported together with the NaCo observations (light-blue). The inset shows the planet location relative to the ones of the cold outer belt and warm inner belt from Su et al. (2017).