Context. Enigmatic dynamical and spectral properties of the first interstellar object (ISO), 1I/2017 U1 (Oumuamua), led to many hypotheses, including a suggestion that it may be an “artificial” spacecraft with thin radiation-pressure-driven light sail. Since similar discoveries by forthcoming instruments, such as Vera C. Rubin telescope Chinese Space Station Telescope (CSST), are anticipated, c...