BVRI Photometry of Jovian Trojan Asteroids

Details BVRI Photometry of Jovian Trojan Asteroids BVRI Photometry of Jovian Trojan Asteroids

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003noao.prop..425f&link_type=abstract

NOAO Proposal ID #2003A-0425

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Scientific paper

Opinions differ on the origin of the Trojan asteroids, found at the stable L4 and L5 Lagrange points of Jupiter's orbit. Some researchers believe they represent a reservoir of primitive objects scattered into the inner solar system (e.g. Shoemaker et al. 1989), while others present scenarios for in situ formation (e.g. Peale 1993). Broadband photometry offers a means to study groups of distant solar system objects to investigate their compositions and processing history. BRVI colors give compositional information; since asteroids are irregularly shaped, accurate color determination involves correcting for the rotational variation of the asteroid's brightness. The phase curves of distant asteroids are also of interest, as the two Trojans observed to date exhibited no opposition effect (French 1987). Previous studies suggest that the Trojan asteroids have a different distribution of lightcurve amplitudes from the main belt population (French et al 1989; Binzel and Sauter 1993.) We propose to extend the study of Trojan rotation and phase properties to smaller objects, to see if such trends continue for smaller Trojans.

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