Summary of 68% credible intervals for the jet viewing angle from our various fits. The top panel excludes cosmology and GW information from the fits, and the luminosity distance is fixed to 40.7 Mpc. The six cosmology-free fits shown correspond (in descending order) to including: all four astrometric datasets plus light-curve-informed priors (our most informed and “best” fit of the six, emphasized in red), all four astrometric datasets, day 207 data omitted but including light-curve-informed priors, day 207 data omitted, day 0 omitted but including light-curve-informed priors, and lastly day 0 omitted. The bottom panel shows results when including cosmology into the fit as explained in Section 2.5. The top “H₀” result refers to the Bayesian-model-averaged viewing angle obtained using uninformative priors on H₀ across the 28 peculiar velocity corrections as described in Section 3.2. The next one refers to the result obtained using flat priors on ﹩\frac{{\theta }_{\rm{v}\,}}{{\theta }_{\,\rm{cp}}}﹩ and fixing t_p to 155 days. The bottom two results correspond to having applied an H₀ prior distribution using the SH0ES result and Planck result, also as described in Section 3.2. The 90% credible interval on viewing angle obtained by K. P. Mooley et al. (2022), which represents the previous best estimate in the literature (for D_L = 40.7 Mpc), is denoted by a yellow band. The vertical blue lines bound the constraint on θ_v reported in K. P. Mooley et al. (2018), where light-curve information and only the two HSA astrometric datasets and a small selection of models were considered.