Individual positions relative to final explosion center. The black cross shows the favored final position $\alpha =5^{\mathrm{h}}{35}^{\mathrm{m}}{27}_{\cdot }^{\mathrm{s}}9884(30),\delta =-{69}^{\circ }{16}^{\mathrm{\prime }}{11}_{\cdot }^{\mathrm{\prime }\mathrm{\prime }}1134(136)$ (ICRS J2016). The black circle indicates the total uncertainty, defined as the offset between the mean early ejecta and mean diffuse ring positions. The upside-down purple triangle marks the average early ejecta position; the red “×” marker shows the average hot spot ellipse position; the gray diamond indicates the average diffuse ring position. Their corresponding ellipses represent 68.3% confidence regions. The right orange triangle shows the position from Alp et al. (2018), corrected from J2015 ($5^{\mathrm{h}}{35}^{\mathrm{m}}{27}_{\cdot }^{\mathrm{s}}9875(11),-{69}^{\circ }{16}^{\mathrm{\prime }}{11}_{\cdot }^{\mathrm{\prime }\mathrm{\prime }}1070(40)$) to J2016 ($5^{\mathrm{h}}{35}^{\mathrm{m}}{27}_{\cdot }^{\mathrm{\prime }\mathrm{\prime }}9878,-{69}^{\circ }{16}^{\mathrm{\prime }}{11}_{\cdot }^{\mathrm{\prime }\mathrm{\prime }}1066$) using the estimated proper motion of SN 1987A.