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Themis family

Asteroid family

Summary

Asteroid family

The Themis family (adj. Themistian; FIN: 602) is a family of carbonaceous asteroids located in the outer portion of the asteroid belt, at a mean distance of 3.13 AU from the Sun. It is one of the largest families with over 4700 known members, and consists of a well-defined core of larger bodies surrounded by a region of smaller ones. The collisional Themis family is named after its parent body, the asteroid 24 Themis, discovered on 5 April 1853 by Italian astronomer Annibale de Gasparis.

Description

The Themis family is one of the largest and longest-recognized dynamical families of asteroids, and is made up of C-type asteroids with a composition believed to be similar to that of carbonaceous chondrites. To date, the Themis family comprises approximately 535 known asteroids.

Asteroids in the Themis family share the following orbital elements:

semimajor axes between 3.08 AU and 3.24 AU
orbital eccentricities between 0.09 and 0.22
orbital inclinations of less than 3°

List

Some of the largest members of this family include:

References

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References

[http://www.lpi.usra.edu/meetings/lpsc2004/pdf/1646.pdf DIVERSITY OF TYPES OF HYDRATED MINERALS ON C≠CLASS ASTEROIDS] A. S. Rivkin, Massachusetts Institute of Technology, [[Ellen Howell. E. S. Howell]], Arecibo Observatory, S. J. Bus, Institute for Astronomy

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

themis-asteroids asteroid-groups-and-families

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