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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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Kurzfassung

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.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Asteroid Compositional Information from Thermal-Infrared Observations
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Harris, AlanNICHT SPEZIFIZIERT
Datum:August 2006
Status:veröffentlicht
Stichwörter:Asteroids, Thermal-infrared observations, Composition, Space weathering, Thermal inertia
Veranstaltungstitel:AOGS 2006 (Asia Oceania Geosciences Society's 3rd Annual Meeting)
Veranstaltungsort:Singapore
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-07-10 – 2006-07-14
Veranstalter :Asia Oceania Geosciences Society
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Asteroiden und Kometen (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Asteroiden und Kometen
Institut für Planetenforschung
Hinterlegt von: Prof. Alan Harris
Hinterlegt am:10 Okt 2006
Letzte Änderung:27 Apr 2009 13:04

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