Density and Composition of Kuiper Belt Objects, Using Binaries

Details Density and Composition of Kuiper Belt Objects, Using Binaries Density and Composition of Kuiper Belt Objects, Using Binaries

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3229s&link_type=abstract

Spitzer Proposal ID #3229

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Scientific paper

We propose to obtain the first well-constrained densities for any Kuiper Belt objects (other than Pluto and Charon), in order to better understand the composition and internal structure of these important bodies, which preserve a record of the accretional history of the outer solar system. We will accomplish this by obtaining robust radiometric diameters for five binary KBOs which have masses that can be determined from their mutual orbits. We will use MIPS to obtain S/N ~11 photometry at 24 and 70 microns, and will determine diameters from the measured fluxes at the two wavelengths using a thermal model which solves for both diameter and the degree to which the object is a "fast" or "slow" rotator. As a byproduct we will also obtain albedos for our targets, adding to the small inventory of KBO albedos and providing additional constraints on surface composition and origin of these bodies.

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