  An interstellar communication network benefits from relay nodes placed in the
gravitational lenses of stars. The signal gains are of order $10^{9}$ with
optimal alignment, allowing for GBits connections at kW power levels with
meter-sized probes over parsec distances. If such a network exists, there might
be a node in our solar system: where is it? With some assumptions on the
network topology, candidate sky positions can be calculated. Apparent positions
are influenced by the parallax motion from the Earth's orbit around the Sun,
and the (slow) drifts caused by proper motions of nearby stars. With Gaia
astrometry, instantaneous positions can be determined with arcsec accuracy.
These potential node locations can be observed in targeted
