We suggest that the kinematics and properties of interstellar object A/2017 U1 point towards its formation in a protoplanetary disk in the ~45 Myr-old Carina or Columba young stellar associations, and subsequent ejection with a low peculiar velocity (1-2 km/sec) during or soon after planet formation inside the ice line. This scenario predicts that the Solar System will encounter more such objects with radiants similar to that of A/2017 U1.
@article{arxiv.1711.01300,
title = {Origin of Interstellar Object A/2017 U1 in a Nearby Young Stellar Association?},
author = {Eric Gaidos and Jonathan P. Williams and Adam Kraus},
journal= {arXiv preprint arXiv:1711.01300},
year = {2017}
}