NOAO >   Observing Info >   Approved Programs >   2013A-0053

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Proposal Information for 2013A-0053


PI: Joseph P. Chatelain, Georgia State University, chatelain@chara.gsu.edu
Address: Physics Department, Sci. Annex, Suite 400, 29 Peachtree Center Ave., Atlanta, GA 30303, USA

CoI: Todd J. Henry, Georgia State University
CoI: Tiffany D. Pewett, Georgia State University
CoI: Linda M. French, Illinois Wesleyan University
CoI: Robert D. Stephens, GMARS

Title: Photometric observations of the brightest Jupiter Greeks.

Abstract: We propose to finish BVRI photometric observations of the 113 brightest Jupiter Trojans from both the L4 (Greek) and the L5 (Trojan) Lagrange points using the CTIO 0.9m, in conjunction with data gathered at Lowell Observatory. With these data we will investigate any color trends and/or differences between the largest members of the two camps as well as reveal any unusual outliers worthy of extensive followup. A comprehensive database of uniform photometry does not exist for this effectively complete sample, so robust comparisons are virtually impossible at this time. These data will also enable comparisons between the Greek and Trojan swarms and other Solar System populations to discover the possible origins of the two camps, which remain surprisingly obscure. In non-photometric conditions, we will measure light curves that yield information about albedo and color changes, shapes, and rotation periods. These data will also lead to important phase curves that can be used to determine surface features and composition. Here we propose for the last southern run for this ongoing photometry program. \emphThe proposed observations will comprise a significant portion of the PI's PhD thesis.


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