Eos, Koronis, and Maria Family Asteroids: Infrared (JHK) Photometry

Infrared photometry at 1.2, 1.6, and 2.2 μm (JHK) is reported for 56 asteroids in the Eos, Koronis and, Maria dynamical families. These data are consistent with a similar surface composition for all of the asteroids of each family. The infrared colors within each family cluster in the region observed for the S taxonomic class, but Eos asteroids may belong to a separable K class. Asteroid 243 Ida, which was observed by the Galileo spacecraft, is a typical member of the Koronis family. The average infrared colors of the Maria family are slightly redder than those of the Eos and Koronis families.