Maria family (of asteroids)

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).


Data for 170 Maria
diameter 40 km
semimajor axis 2.552 AU
perihelion 2.39 AU
aphelion 2.72 AU
inclination 14.4°
period 4.08 years