Radio spectrum characteristics and phase-referenced positions of AT2019wey. Black: EVN epoch, red: VLBA epoch 1, blue: VLBA epoch 2, cyan: measurements by Yadlapalli et al. (2021) with the VLBA at 4.8 GHz. Left panel: flux density vs. frequency. The lines connecting the data points are not fitted curves but are simply to guide the eye. The flux densities measured by the VLA (grey; Yao et al. 2021) are also shown for comparison, and the observing dates are denoted by lowercase letters a–f accordingly. Right panel: relative astrometric positions with the average position (magenta; obtained by our five measurements listed in Table 4) as the reference point. The lowercase letters a and b correspond to 4.5 and 6.7 GHz, respectively.