The Columbia Encyclopedia, Sixth Edition. 2001-07.
Juno, in astronomy
(j´n) (KEY) , in astronomy, 3d asteroid to be discovered. It was found in 1804 by C. Harding. It has a diameter of c.120 mi (190 km). Its average distance from the sun is 2.67 astronomical units, and its orbital period is 1,594 days.