The Maria family is a Hirayama family of asteroids, with about 70 known members, mostly S-type, which orbits the Sun at a mean distance of 2.55 AU (astronomical units). Its members are unusual for main belt asteroids in having a fairly high inclination of about 15°. The prototype and one of the largest of the group is 170 Maria, discovered in 1877 by H. Joseph Perrotin (1845–1904).