Schubart family explained

The Schubart family (002^[1]) is a collisional asteroid family of at least 353 known asteroids,^[2] named for its largest member, the 67km (42miles)-across asteroid 1911 Schubart. It lies within the larger dynamical group of Hilda asteroids, a group of asteroids in the 3:2 orbital resonance with Jupiter. Like its namesake, all members of the family are dark P-type asteroids with albedos of around 0.06. Another asteroid family in the Hilda dynamical group is the Schubart family, named for its largest member, 1911 Schubart. All members of the family are dark P-type asteroids with albedos of around 0.04. Another asteroid family in the Hilda dynamical group is the Hilda 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 a dynamical 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 wider Hilda 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 of 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]

Large members

The 10 brightest Schubart family members
	Size (km)	proper a (AU)		proper i
10.04	67	3.9659	0.191	2.916
11.77	30	3.9661	0.196	2.874
11.87	28	3.9661	0.197	2.853
11.90	28	3.9659	0.190	2.793
11.96	27	3.9661	0.195	2.879
12.26	26	3.9659	0.192	2.855
12.44	25	3.9658	0.190	2.834
12.52	22	3.9662	0.198	2.982
12.81	20	3.9662	0.197	2.898
12.98	20	3.9660	0.193	2.889

Notes and References

Nesvorny . D. . Broz . M. . Carruba . V. . Identification and Dynamical Properties of Asteroid Families . 2015 . 10.48550/arXiv.1502.01628 . Asteroids IV . 28 July 2024.
Nesvorný . David . Nesvorny HCM Asteroid Families PDS SBN Asteroid/Dust Subnode . 14 August 2020 . 10.26033/6cg5-pt13 . NASA Planetary Data System . 28 July 2024.
Holsapple . K.A. . Housen . K.R. . The catastrophic disruptions of asteroids: History, features, new constraints and interpretations . Planetary and Space Science . December 2019 . 179 . 104724 . 10.1016/j.pss.2019.104724 . 30 July 2024.
Vinogradova . T. A. . Identification of asteroid families in Trojans and Hildas . Monthly Notices of the Royal Astronomical Society . 13 October 2015 . 454 . 3 . 2436–2440 . 10.1093/mnras/stv2115 . 30 July 2024.