If your talking the comet presently in the near Earth area, an impact with a large enough NEO for us to know about is highly unlikely. At least during the time the comet is near us. This because I know of no significant NEOs presently passing as near Earth as the comet is. <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>