Eunomia (minor planet designation 15 Eunomia) is a very large asteroid in the inner asteroid belt. It is the largest of the stony (S-type) asteroids after 3 Juno. It is quite a massive asteroid, in 6th to 8th place (to within measurement uncertainties). It is the largest Eunomian asteroid, and is estimated to contain 1% of the mass of the asteroid belt.Eunomia was discovered by Annibale de Gasparis on July 29, 1851, and named after Eunomia, one of the Horae (Hours), a personification of order and law in Greek mythology.

Annibale de Gasparis (9 November 1819, Bugnara – 21 March 1892, Naples; Italian pronunciation: [anˈniːbale de ˈɡasparis]) was an Italian astronomer, known for discovering asteroids and his contributions to theoretical astronomy.