NOAO >   Observing Info >   Approved Programs >   2010B-0187

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Proposal Information for 2010B-0187


PI: Linda M. French, Illinois Wesleyan University, lfrench@iwu.edu
Address: Physics Department, P.O. Box 2900, Bloomington, IL 61704, USA

CoI: Susan Lederer, California State University San Bernardino
CoI: Paul Abell, Planetary Science Institute
CoI: Derrick Rohl, Illinois Wesleyan University
CoI: Robert Stephens, Goat Mountain Astronomical Research Station

Title: Photometry of an Object in a Comet-Like Orbit and Jovian Trojan Asteroids

Abstract: Recent work suggests a possible connection between the Jovian Trojan asteroids and more distant objects such as Kuiper belt objects and comets. The Nice Model for Solar System formation predicts that the precursors of today’s Trojans formed at greater heliocentric distances and captured into their present orbits after Jupiter and Saturn passed through their 2:1 mean motion resonance (e.g. Morbidelli et al. 2009). Observationally, the Trojans have similar spectral and physical properties to those of bare cometary nuclei (e.g. Abell et al. 2005; Lamy et al. 2004). Increasing numbers of objects are being found with high-inclination, high-eccentricity orbits; several dozen are now known and a fair percentage have eventually shown low-level cometary behavior (e.g. C/2001 OG108; Abell et al. 2005). These objects may represent a population of comets evolving into asteroid-like orbits. We propose to observe broadband colors for 082SO218, an object in a comet-like orbit, which will be combined with near-infrared spectra obtained by our collaborators. We will also obtain phase curves over a wide range of phase angles for 3-5 Trojan asteroids.


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