  The interest in the problem of small asteroids observed shortly before a deep
close approach or an impact with the Earth has grown a lot in recent years.
Since the observational dataset of such objects is very limited, they deserve
dedicated orbit determination and hazard assessment methods. The currently
available systems are based on the systematic ranging, a technique providing a
2-dimensional manifold of orbits compatible with the observations, the
so-called Manifold Of Variations. In this paper we first review the Manifold Of
Variations method, to then show how this set of virtual asteroids can be used
to predict the impact location of short-term impactors, and compare the results
with those of already existent methods.
