Comet <a class="mw-redirect" href="https://en.wikipedia.org/wiki/C/2006_P1_(McNaught)" id="mwAQk" rel="mw:WikiLink" title="C/2006 P1 (McNaught)">C/2006 P1 (McNaught)</a>, one of the brightest comets ever observed is at its zenith visible during the day.