Resulting MCMC posterior distribution of the six orbital elements (q, e, i, Ω, ω, t_p) of GJ 758 B’s orbit using the universal variable code. The diagonal diagrams show mono-dimensional probability distributions of the individual elements. The off-diagonal plots show bidimensional probability maps for the various couples of parameters. This illustrates the correlation between orbital elements. The logarithmic color scale in these plots is linked to the relative local density of orbital solutions, as indicated to the side of Fig. 14. In the diagonal histograms, the red bar indicates the location of the best χ² solution, obtained via standard least-square fitting. The location of this solution is shown with black stars in the off-diagonal plots. This solution is also plotted in Fig 10.