  We analyse the orbital parameters of the exoplanet candidate Proxima c
recently discovered by Damasso et al. (2020) using a combination of its
spectroscopic orbital parameters and Gaia DR2 proper motion anomaly. We obtain
an orbital inclination of $i = 152 \pm 14 \deg$ for the prograde solution,
corresponding to a planet mass of $m_c = 12^{+12}_{-5}\ M_\oplus$, comparable
to Uranus or Neptune. While the derived orbital parameters are too uncertain to
predict accurately the position of the planet for a given epoch, we present a
map of its probability of presence relatively to its parent star in the coming
years.
