TheThemis family (adj. Themistian;FIN:602) is afamily of carbonaceousasteroids located in theouter portion of theasteroid belt, at a mean distance of 3.13AU from theSun. It is one of thelargest families with over 4700 known members,^[1] and consists of a well-defined core of larger bodies surrounded by a region of smaller ones. Thecollisional Themis family is named after itsparent body, the asteroid24 Themis, discovered on 5 April 1853 by Italian astronomerAnnibale de Gasparis.^[2]

The Themis family is one of the largest and longest-recognized dynamical families of asteroids, and is made up ofC-type asteroids with a composition believed to be similar to that ofcarbonaceous chondrites.^[3] 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°

Some of the largest members of this family include:^[4][5]

• Hirayama family

• Castillo-Rogez, C. & Schmidt, B. E. (2010)."Geophysical Evolution of the Themis Family Parent Body"(PDF).{{cite journal}}:Cite journal requires|journal= (help)

• Nesvorny HCM Asteroid Families V3.0, Small Bodies Data Ferret

• Themis asteroids
• Asteroid groups and families

• Articles with short description
• Short description matches Wikidata
• CS1 errors: missing periodical
• Use dmy dates from November 2018