TheSchubart family (002[1]) is a collisionalasteroid family of at least 353 known asteroids,[2] named for its largest member, the 67-kilometre (42 mi)-across asteroid1911 Schubart. It lies within the larger dynamical group ofHilda asteroids, a group of asteroids in the 3:2orbital resonance withJupiter. Like its namesake, it's named after the largest member,1911 Schubart. All members of the family are darkP-type asteroids withalbedos of around 0.04. Another asteroid family in the Hilda dynamical group is theHilda family, named for its largest member,153 Hilda.
An asteroid family is a group of physically related asteroids usually created by a collision with an original larger asteroid, with the fragments continuing on similar orbits to the original. This is distinct from adynamical group in that the members of a dynamical group only share similar orbits because of gravitational interactions with planets, which concentrate asteroids in a particular orbital range. Members of the Schubart family are both part of the widerHilda dynamical group, and fragments of a single original asteroid. The family is considered a catastrophic asteroid family because even its largest member, 1911 Schubart, does not make up a majority of the family's mass.[3]
The family is fairly old, with an estimated age of1.7±0.7 billion years.[4] Although this is old by the standards of typical asteroid families, the Hilda collisional family in the same orbital region is much older, possibly 4 billion years in age.[4]
| Name | Abs. Mag | Size (km) | proper a (AU) | proper e | proper i |
|---|---|---|---|---|---|
| 1911 Schubart | 10.04 | 67 | 3.9659 | 0.191 | 2.916 |
| 3923 Radzievskij | 11.77 | 30 | 3.9661 | 0.196 | 2.874 |
| 4230 van den Bergh | 11.87 | 28 | 3.9661 | 0.197 | 2.853 |
| (8376) 1992 OZ9 | 11.90 | 28 | 3.9659 | 0.190 | 2.793 |
| (13035) 1989 UA6 | 11.96 | 27 | 3.9661 | 0.195 | 2.879 |
| 9829 Murillo | 12.26 | 26 | 3.9659 | 0.192 | 2.855 |
| 8550 Hesiodos | 12.44 | 25 | 3.9658 | 0.190 | 2.834 |
| (15615) 2000 HU1 | 12.52 | 22 | 3.9662 | 0.198 | 2.982 |
| (8913) 1995 YB2 | 12.81 | 20 | 3.9662 | 0.197 | 2.898 |
| (12307) 1991 UA | 12.98 | 20 | 3.9660 | 0.193 | 2.889 |
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