Mass and orbital inclination constraints for the PSR J0955−6150 binary system. In both panels the lines represent the nominal and ±1σ mass and inclination constraints derived from the PK parameters of the TEMPO2 DDH solution in Table 4 (orthometric amplitude of the Shapiro delay, h₃, in dashed blue; the orthometric ratio, ς, in solid blue; and the rate of advance of periastron, , in solid orange), these constraints are calculated assuming that they are purely relativistic and that GR is the correct theory of gravity. The grey dotted lines show the Tauris & Savonije (1999) values for the M_c of this system given its orbital period. The green circles indicate the best-fit masses and orbital inclination determined with the DDGR model. Left: cos i – M_c plane. Right: M_p − M_c plane. The grey area is excluded because sin i  ≤  1.