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Planetary Science Goals for the Spitzer Warm Era
Carey Lisse, Mark Sykes, David Trilling +6
The overarching goal of planetary astronomy is to deduce how the present collection of objects found in our Solar System were formed from the original material present in the proto…
Comet 162P/Siding Spring: A Surprisingly Large Nucleus
Y. R. Fernandez, H. Campins, M. Kassis +5
We present an analysis of thermal emission from comet 162P/Siding Spring (P/2004 TU12) measured during its discovery apparition in 2004 December. The comet showed no dust coma at t…
Thermal Properties of Centaurs Asbolus and Chiron
Y. R. Fernandez, D. C. Jewitt, S. S. Sheppard
We have measured the mid-infrared thermal continua from two Centaurs, inactive (8405) Asbolus and active 95P=(2060) Chiron, and have constrained their geometric albedos, p, and eff…
Low Albedos Among Extinct Comet Candidates
Y. R. Fernandez, D. C. Jewitt, S. S. Sheppard
We present radiometric effective radii and visual geometric albedos for six asteroids in comet-like orbits. Our sample has three of the four known retrograde asteroids (1999 LE31,…