Eunomia family

[3] It is likely that the parent body was at least partly differentiated, because the surface of Eunomia and spectra of the smaller family members show some variation.

[4][5][6] This notwithstanding, other studies have indicated that the body that was definitively shattered by the impact that created the family was probably already somewhat fragmented by previous smaller collisions.

Spectroscopic studies have shown that the family members span a noticeable range of compositions, although all remain within the S spectral class.

Since most of these smaller objects are "eroded" away over time due to secondary collisions, gravitational perturbations, and the Yarkovsky effect, this indicates that the Eunomia family was created relatively recently (on an astronomical timescale).

[1][2]: 23 A number of interlopers have been identified, which share the same orbital elements as the true family members, but can not have come from the same breakup because of spectral (hence, compositional) differences.