Albedos of Small Hilda Asteroids

Details Albedos of Small Hilda Asteroids Albedos of Small Hilda Asteroids

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40819h&link_type=abstract

Spitzer Proposal ID #40819

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Scientific paper

The Hilda asteroid group, found near the 3:2 mean motion resonance with Jupiter, is composed mostly of largely primitive D-type and P-type asteroids, with D-type asteroids dominating the small end of the Hilda size distribution and P-types comprising many of the largest Hilda asteroids. The D-type asteroids in the Hilda group are of particular interest due to their spectral similarity to cometary nuclei and the dynamical possibility that escaped Hilda asteroids may in fact contribute to the Jupiter-family comet population. We propose to use MIPS on Spitzer to obtain 24μm photometry of a sample of the smallest Hilda asteroids currently known, and then to combine these data with optical data obtained from telescopes on Mauna Kea to determine albedos for these poorly understood objects. The albedo distribution of this population can then be compared to those of other cometary and asteroidal groups, permitting us to relate the Hilda asteroids to objects on each side of the asteroid-comet divide.

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