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Spitzer and Herschel observations of TNOS: potential and pitfalls

Harris, Alan (2008) Spitzer and Herschel observations of TNOS: potential and pitfalls. Asteroids, Comets, Meteors 2008, 2008-07-13 - 2008-07-18, Baltimore (USA).

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Official URL: http://www.lpi.usra.edu/meetings/acm2008/pdf/8003.pdf

Abstract

Thanks largely to the Spitzer Space Telescope, thermal-infrared observations of TNOs have begun to contribute significantly to our understanding of these fascinating objects. After its launch ESA’s Herschel Space Observatory will hopefully continue where Spitzer has to leave off. Thermal-infrared photometry can be used to provide crucial information on sizes and albedos and, potentially, on thermal inertia and surface properties. However, simply adopting techniques used for main-belt and near-Earth asteroids can lead to large errors. Thermophysical model calculations and published data sets are used to highlight and discuss the problems associated with the interpretation of thermal-infrared data on TNOs. It is shown how simple considerations applied to published data on Centaurs and TNOs lead to a significant but relatively low representative value of thermal inertia, an indicator of regolith porosity, of 10 - 20 Jm<sup>-2</sup>s<sup>-0.5</sup>K<sup>-1</sup>.

Document Type:Conference or Workshop Item (Speech)
Title:Spitzer and Herschel observations of TNOS: potential and pitfalls
Authors:
AuthorsInstitution or Email of Authors
Harris, AlanUNSPECIFIED
Date:17 July 2008
Refereed publication:No
In ISI Web of Science:No
Status:Published
Keywords:Asteroids, TNOs, Centaurs, Space Observatories, Infrared Observations, Thermal inertia
Event Title:Asteroids, Comets, Meteors 2008
Event Location:Baltimore (USA)
Event Type:international Conference
Event Dates:2008-07-13 - 2008-07-18
Organizer:Johns Hopkins University Applied Physics Laborartory
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Asteroiden und Kometen (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Prof. Alan Harris
Deposited On:18 Aug 2008
Last Modified:12 Dec 2013 20:32

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