Sample orbits from the fits to astrometry of PDS 70 b, c, and the candidate d. Left: orbits taken from the fit assuming coplanarity. Right: Orbits taken from the fit assuming stability (before N-body analysis). Orbits for b, c, and the candidate d are shown in blue, red, and green, respectively. The astrometry data are plotted with error bars in black. All astrometry is given relative to the central star. The coplanar fit produces many orbital configurations where the orbits of b and the candidate d overlap, even though these orbits would likely be unstable.