  AT2019wey is a transient discovered by the Asteroid Terrestrial-impact Last
Alert System (ATLAS) survey in December of 2019. Follow-up optical, radio, and
X-ray observations led to classification of this source as a Galactic black
hole X-ray binary. We carried out one-epoch 6.7 GHz European VLBI (Very Long
Baseline Interferometry) Network (EVN) and two-epoch multiple-frequency (1.6,
4.5, 6.7 GHz) Very Long Baseline Array (VLBA) observations within a year after
its discovery. These observations reveal a fading and flat-spectrum radio
source with no discernible motion. These features suggest the detection of a
compact jet. The source appears resolved at milliarcsecond scales, and the
source angular size versus frequency trend is consistent with scatter
broadening. This allows us to constrain the lower limit of the source distance
to 6 kpc, if the scattering medium is in a Galactic spiral arm. For a source
location larger than 3 kpc, the estimated upper limit of the peculiar velocity,
relative to the local standard of rest, suggests the asymmetric natal kick may
have occurred during the black hole formation stage.
