On 20 March 2014 UT, the 72 km diameter asteroid (163) Erigone will occult Regulus, a 1.3 mag star in the constellation Leo, for observers along a path across NE USA, E Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 11.1 mag to 12.4 mag (the magnitude of the asteroid) for at most 14.3 seconds. (source: http://www.asteroidoccultation.com/2014_03/0320_163_32317.htm) Erigone Apéndice map Regulus is about 78 light-years away from Earth and the brightest star in Leo and the 21st brightest star in sky. This may be the best and brightest asteroid occultation ever predicted to occur over a populated area. For this reason, many observers from USA and Canada are going to travel to the Lake Ontario to observe this event.