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Astrometric study of Gaia DR2 stars for interstellar communication

Seto, Naoki; Kashiyama, Kazumi

We discuss the prospects of high precision pointing of our transmitter to habitable planets around Galactic main sequence stars. For an efficient signal delivery, the future sky positions of the host stars should be appropriately extrapolated with accuracy better than the beam opening angle $\Theta$ of the transmitter. Using the latest data releas…