German astronomer Karl Ludwig Harding discovered one of the largest main-belt asteroids, naming it Juno after the Roman goddess.

Karl Ludwig Harding was a German astronomer, who discovered Juno, the third asteroid of the main-belt in 1804.

The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies called asteroids or minor planets. The identified objects are of many sizes, but much smaller than planets, and, on average, are about one million kilometers apart. This asteroid belt is also called the main asteroid belt or main belt to distinguish it from other asteroid populations in the Solar System.

Juno is a large asteroid in the asteroid belt. Juno was the third asteroid discovered, in 1804, by German astronomer Karl Harding. It is tied with three other asteroids as the thirteenth largest asteroid, and it is one of the two largest stony (S-type) asteroids, along with 15 Eunomia. It is estimated to contain 1% of the total mass of the asteroid belt.

Juno was an ancient Roman goddess, the protector and special counsellor of the state. She was equated to Hera, queen of the gods in Greek mythology and a goddess of love and marriage. A daughter of Saturn and Ops, she was the sister and wife of Jupiter and the mother of Mars, Vulcan, Bellona, Lucina and Juventas. Like Hera, her sacred animal was the peacock. Her Etruscan counterpart was Uni, and she was said to also watch over the women of Rome. As the patron goddess of Rome and the Roman Empire, Juno was called Regina ("Queen") and was a member of the Capitoline Triad, centered on the Capitoline Hill in Rome, and also including Jupiter, and Minerva, goddess of wisdom.