3 Juno

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June as seen by 100-inch Hooker telescope at Mt. Wilson Observatory in four wavelength bands

3 Juno is a main belt asteroid discovered by Karl Ludwig Harding on September 1, 1804.[1] Juno was the third asteroid discovered in the Solar System and is named after Juno, the Roman goddess that is the queen of all gods.[2]

Size comparison: the first 10 asteroids discovered, profiled against Earth's Moon. Juno is third from the left.

Juno is an S-type asteroid,[3] and is estimated to contain 1% of the total mass of the asteroid belt.[4]

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