Searching for Stars Closely Encountering with the Solar System Based on
  Data from the Gaia DR1 and RAVE5 Catalogues
  We have searched for the stars that either encountered in the past or will
encounter in the future with the Solar system closer than 2 pc. For this
purpose, we took more than 216 000 stars with the measured proper motions and
trigonometric parallaxes from the Gaia DR1 catalogue and their radial
velocities from the RAVE5 catalogue. We have found several stars for which
encounters closer than 1 pc are possible. The star GJ 710, for which the
minimum distance is d_m=0.063+/-0.044 pc at time t_m=1385+/-52 thousand years,
is the record-holder among them. Two more stars, TYC 8088-631-1 and TYC
6528-980-1, whose encounter parameters, however, are estimated with large
errors, are of interest.
