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Amalthea - Implications of the temperature observed by VoyagerThe temperature profile of Amalthea's surface layer is modeled as a function of location and time of day, assuming a triaxial ellipsoid shape and thermal properties similar to those of the lunar soil. Although the major heat source is direct insolation, temperatures are slightly increased by thermal radiation from Jupiter, sunlight reflected from the planet, and charged particle bombardment. Possible sources of error in the model are discussed in detail, including satellite shape effects, unusually low emissivity, uncommonly rough surface, abnormal thermal inertia, charged particle flux variability, and Joule heating. Voyager 1 IRIS observations suggest that the Amalthean surface has an emissivity near unity, but cannot put any useful limits on the thermal inertia of the Amalthean surface layer.
Document ID
19830053506
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Simonelli, D. P.
(Cornell University Ithaca, NY, United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1983
Publication Information
Publication: Icarus
Volume: 54
ISSN: 0019-1035
Subject Category
Lunar And Planetary Exploration
Accession Number
83A34724
Funding Number(s)
CONTRACT_GRANT: NSG-7156
Distribution Limits
Public
Copyright
Other

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