Density and Albedo of the KBO Binary System 1999 SM165

Details Density and Albedo of the KBO Binary System 1999 SM165 Density and Albedo of the KBO Binary System 1999 SM165

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20217s&link_type=abstract

Spitzer Proposal ID #20217

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Scientific paper

Densities provide our only available constraint on the internal structure and composition of Kuiper Belt objects (KBOs), and currently only two KBOs are amenable to direct density measurements. These are the two brightest binary KBOs, which have masses determined from their satellite orbits and sufficient thermal emission for Spitzer to determine a useful radiometric diameter. One of these, (47171) 1999 TC36, has already been observed by a Spitzer GTO program and has a surprisingly low density of ~0.75 g cm-3. We propose to obtain a radiometric diameter and density for the other detectable binary, (26308) 1999 SM165, to provide a first estimate of the range of densities, and thus internal structures and compositions, among Kuiper Belt Objects.

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