SPACEWATCH® Observations of Virtual Impactors and other Priority Near-Earth Asteroids

We present our Target-of-Opportunity program to observe faint potentially hazardous near-Earth asteroids with larger telescopes in order to reduce the uncertainty in hazard levels. To date, we have triggered interrupt observations for four asteroids with the potential to impact Earth within the next 100 years. These observations reduced the orbital uncertainties of 3 targets including leading to the removal of one target from the impact risk list.