Plot of the allowable orbital orientation of J1455−3330. The black lines represent constraints from ς, and grey contours show the constraint from ẋ (1-σ solid, 3-σ dashed). The green dashed contours show the constraints from temponest using priors where the inclination angle ranges from 90 to 180 and Ω ranges from 270 to 450 (–90–90°). The purple dashed contours show the constraints from temponest using priors where inclination angle, i, ranges from 0 to 90 and longitude of ascending node Ω ranges from 0 to 360. The light blue dashed horizontal line shows the position angle of the proper motion. The marginalised constraints on cos i and Ω are shown as 1D histograms (in green and purple) in the top and side panels.