Hungaria family

This article is about the collisional asteroid family. For the dynamical group this family is part of, see Hungaria asteroid.

The Hungaria family (003[1]) is a collisional asteroid family of at least 2,966 known asteroids,[2] named for its largest member, the 11-kilometre (6.8 mi)-across asteroid 434 Hungaria. It lies within the larger dynamical group of Hungaria asteroids, a group of asteroids in the far inner asteroid belt, with semimajor axes of 1.78 to 2.00 AU. All members of the family are bright E-type asteroids with albedos of around 0.35-0.6.

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 Hungaria family are both part of the wider Hungaria dynamical group, and fragments of 434 Hungaria. The family is considered a catastrophic asteroid family because 434 Hungaria, its largest member, makes up only a fifth of the family's mass.[3]

The family has been variously estimated to be 205±45 million years,[4] 275 million years,[5] and 400±100 million years old.[6]

Large members

434 Hungaria1103 Sequoia3169 Ostro4031 Mueller3086 Kalbaugh1919 Clemence5390 Huichiming5427 Jensmartin4232 Aparicio5378 EllyettHungaria family
Mass distribution of the Schubart family (assuming similar densities)
The 10 brightest Hungaria family members[2]
Name Abs. Mag Size (km) proper
a (AU)		 proper
e		 proper
i
434 Hungaria 11.24 11 1.9443 0.078 20.868
1103 Sequoia 12.21 6.7 1.9336 0.083 20.847
3169 Ostro 12.86 4.7 1.8918 0.070 22.357
4031 Mueller 13.27 3.9 1.9342 0.071 20.624
3086 Kalbaugh 13.45 4.0 1.9358 0.048 21.800
1919 Clemence 13.58 3.3 1.9360 0.075 20.980
5390 Huichiming 13.66 3.4 1.9391 0.059 21.111
5427 Jensmartin 13.74 3.2 1.9317 0.085 21.162
4232 Aparicio 13.78 3.3 1.9362 0.063 20.608
5378 Ellyett 13.81 3.0 1.9342 0.073 21.213

References

  1. ^ Nesvorny, D.; Broz, M.; Carruba, V. (2015). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. arXiv:1502.01628. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 978-0-8165-3213-1.
  2. ^ a b Nesvorný, David (14 August 2020). "Asteroids". Nesvorny HCM Asteroid Families Bundle V1.0. NASA Planetary Data System. doi:10.26033/6cg5-pt13.
  3. ^ Holsapple, K.A.; Housen, K.R. (December 2019). "The catastrophic disruptions of asteroids: History, features, new constraints and interpretations". Planetary and Space Science. 179: 104724. doi:10.1016/j.pss.2019.104724. Retrieved 30 July 2024.
  4. ^ "Asteroid Family Ages". AstDyS. Retrieved 28 July 2024.
  5. ^ Lucas, Michael P.; Emery, Joshua P.; MacLennan, Eric M.; Pinilla-Alonso, Noemi; Cartwright, Richard J.; Lindsay, Sean S.; Reddy, Vishnu; Sanchez, Juan A.; Thomas, Cristina A.; Lorenzi, Vania (April 2019). "Hungaria asteroid region telescopic spectral survey (HARTSS) II: Spectral homogeneity among Hungaria family asteroids". Icarus. 322: 227–250. Bibcode:2019Icar..322..227L. doi:10.1016/j.icarus.2018.12.010. Retrieved 30 July 2024.
  6. ^ Forgács-Dajka, E.; Sándor, Zs; Sztakovics, J. (1 January 2022). "A survey on Hungaria asteroids involved in mean motion resonances with Mars". Astronomy & Astrophysics. 657: A135. arXiv:2110.11745. doi:10.1051/0004-6361/202141719.