Asteroid Sentinel

The B6 12 Foundation is announcing a project to build, launch, and operate a private, space-based telescope that would search out Near-Earth asteroids, both to establish a baseline to support planetary defense efforts and to target likely mining possibilities for companies like Planetary Resources,

NASA believes we have identified 95% of the large asteroids that could hit Earth, but that leaves 5%-- dozens or hundreds-- of the total still to be catalogued.  It's also an ongoing, dynamic process that needs monitoring.  As orbits change due to shifting gravitational influences, large bodies not now dangerous may become so.