Near-Earth asteroid 161273 (1999 JU3) is the primary target of the Japanese Aerospace Exploration Agency's Hyabusa-2 sample return mission. This object is also considered a potential target for two other sample return missions: the National Aeronautics and Space Administration's OSIRISREx and the European Space Agency's Marco Polo- R. This asteroid is likely to have originated in the main-belt and in this work. Our initial dynamical considerations indicate that the source of 1999 JU3 is in the inner-belt (a < 2.5 AU). We are in the process of using spectral information and albedo to constrain the source further.