Hi Michael,
None of the current Lick Observatory faculty are deeply interested in
asteroids. For more ideas, I recommend finding people through their
journal articles. Most scientists will be flattered if you show them
you have read and understood their articles. One place you can find
the abstracts of articles about Trojan asteroids is NASA's
Astrophysics Data System Abstract Service,
http://adsabs.harvard.edu/abstract_service.html.
Best wishes,
-Neal.
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