Only Asteroid Visible to Naked Eye in Sky This Week

chuckpeters writes "Vesta, the only asteroid that can be seen by the naked eye will be visible over the next week. Vesta was the fourth asteroid to be discovered and is the second largest. It is in the constellation Virgo and has just passed opposition. Vesta has very large, circular crater near the asteroid's south pole that is so deep it exposes the mantle. The asteroid appears to have differentiated into layers like the planets."