  The local detection rate of interstellar objects can allow for estimations of
the total number of similar objects bound by the Milky Way thin disk. If
interstellar objects of artificial origin are discovered, the estimated total
number of objects can be lower by a factor of about $10^{16}$ if they target
the habitable zone around the Sun. We propose a model for calculating the
quantity of natural or artificial interstellar objects of interest based on the
object's velocity and observed density. We then apply the model to the case of
chemically propelled rockets from extraterrestrial civilizations. Finally, we
apply the model to three previously discovered interstellar objects -- the
object 'Oumuamua of unknown origin and the first interstellar meteors CNEOS
2014-01-08 and CNEOS 2017-03-09.
