View of the H₂O maser features detected toward TXS 2226-184 with the VLBA in epoch 1998.40 (left panel) and in epoch 2017.45 (right panel). Triangles identify H₂O maser features whose side length is scaled logarithmically according to their peak flux density (Tables 2 and 3). The 40 mJy beam⁻¹ symbol is plotted for comparison in both panels. Maser local standard of rest radial velocities are indicated by color (the velocity of the galaxy is km s⁻¹). The beam size (see Table 1) is shown in the bottom right corner. At the distance of the galaxy (i.e., 107.1 Mpc, derived assuming H₀ = 70 km s⁻¹ Mpc⁻¹, Kuo et al. 2018) 1 mas corresponds to ∼0.5 pc. Left panel: in absence of absolute position measurements the relative positions of all maser features are evaluated considering the brightest maser feature (TXS.B01) as reference. The two blue circles indicate the area where Ball et al. (2005) detected the blue-shifted maser features and we did not (detection threshold of 3σ). The dashed line is the best least-squares linear fit of the maser distribution (PA_H2O = +26° ±16°). Right panel: the reference position is the absolute position of TXS.V02 (see Table 3). The dashed line is the best least-squares linear fit of the maser distribution (PA_H2O = +28° ±12°).