Asteroid Compositional Information from Thermal-Infrared Observations
Harris, Alan (2006) Asteroid Compositional Information from Thermal-Infrared Observations. AOGS 2006 (Asia Oceania Geosciences Society's 3rd Annual Meeting), 2006-07-10 – 2006-07-14, Singapore.
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Thermal-infrared observations are the main source of information on asteroid sizes and albedos. In many cases reflection spectra alone provide ambiguous information on asteroid mineralogy; albedos are required to remove the spectral degeneracy between classes such as E, M and P. Albedo measurements are also important for the identification of objects that may be dormant or extinct comets. A phenomenon that can complicate the mineralogical analysis of reflection spectra is space weathering. Recent thermal-infrared observations of near-Earth asteroids have provided evidence for a dependence of space weathering on size, and may provide valuable information on the timescale of space weathering. Values of thermal inertia, which is determined by the degree to which an asteroid’s surface is covered in thermally-insulating, dusty material, have recently been derived for a few objects from extensive thermal-infrared observations and sophisticated thermophysical modeling. Does thermal inertia depend on composition and size? The importance of thermal-infrared observations for investigations of asteroid mineralogy, space-weathering effects, and surface properties, will be reviewed.
|Document Type:||Conference or Workshop Item (Speech)|
|Title:||Asteroid Compositional Information from Thermal-Infrared Observations|
|Keywords:||Asteroids, Thermal-infrared observations, Composition, Space weathering, Thermal inertia|
|Event Title:||AOGS 2006 (Asia Oceania Geosciences Society's 3rd Annual Meeting)|
|Event Type:||international Conference|
|Event Dates:||2006-07-10 – 2006-07-14|
|Organizer:||Asia Oceania Geosciences Society|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|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)|
|Institutes and Institutions:||Institute of Planetary Research > Asteroids and Comets|
Institute of Planetary Research
|Deposited By:||Prof. Alan Harris|
|Deposited On:||10 Oct 2006|
|Last Modified:||27 Apr 2009 13:04|
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