Orbital parameters and fit for J0008. The right panel show the best fit from the grid approach, with black dots representing the astrometric data and the grey ellipses their uncertainty. The periastron is represented with the dashed line, with the dotted line the line of nodes. The blue lines connect the observations with their expected fitted values. The orbital solution from the MCMC are given in Appendix A. The asterisk (^*) next to ω and Ω values for the MCMC indicate the pair to be defined with a ±180° degeneracy.