A small asteroid will join Earth's orbit around the sun for two months beginning Sunday, becoming a 'mini-moon.'

This week see many special celestial sights, from a bright comet and a solar eclipse to a bright Venus and the possibility of aurora. There's even a new "mini" moon.

Scientists call such phenomena mini-moons. The asteroid was found by a group called ATLAS, which stands for Asteroid Terrestrial-impact Last Alert System, in August. The researchers who found it published a nonpeer-reviewed study about the asteroid.