  Until now, only two Interstellar Objects (ISOs) have been discovered:
1I/'Oumuamua and 2I/Borisov. Despite a limited amount of observations, they
present high scientific interest for the research community. In order to
further analyze these objects, in-situ data is required. However, beginning the
mission design and spacecraft manufacture after ISO detection would
significantly lower mission success probability. Consequently,"build-and-wait"
is an appealing mission concept. To prepare the upcoming missions to ISOs it is
required to have a deeper knowledge on the probability analysis to locate these
objects within the Solar System. Therefore, the optimum location to intercept
these objects has been studied by performing a computational analysis using the
Runge-Kutta RKF4(5) numerical method. This method has been used to determine
the likelihood of ISOs trajectories intercepting the ecliptic. The results show
a peak at a distance of ~1 AU from the Sun. Therefore, the vicinity of the
Earth's orbit is the best position to send or place a spacecraft for ISO
interception. In addition, these results add validity to the theory of
panspermia via ISO impact. The author has estimated an annual probability of
ISO-Earth impact of 10$^{-7}$.
