Ice and minerals on Callisto - A reassessment of the reflectance spectra

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · Icarus (International Journal of the Solar System); (USA)

DOI:https://doi.org/10.1016/0019-1035(90)90225-X· OSTI ID:6591287

Roush, T L; Pollack, J B; Witteborn, F C; Bregman, J D; Simpson, J P ^[1]

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1. NASA, Ames Research Center, Moffett Field, CA (USA) California Univ., Berkeley (USA)

The results of a comparison of laboratory spectral reflectance measurements of particulate mixtures of both hydrated silicates and palagonite with water ice, on the one hand, with two previously unpublished reflectance spectra of Callisto, yield direct support for the hypothesis that the measured reflectance of Callisto includes a substantial nonice component. Hapke's (1981) equations are used in a theoretical model for thorough analysis of telescopic data; a comparison of the calculation results thus obtained with measured reflectance data for Callisto indicate that three-component, ice/magnetite/serpentine mixtures are a better match for telescopic data than two-component ice mixtures. 43 refs.

• OSTI ID: 6591287
• Journal Information: Icarus (International Journal of the Solar System); (USA), Vol. 86; ISSN 0019-1035
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
JUPITER PLANET
SATELLITES
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
ICE
MAGNETITE
MATHEMATICAL MODELS
MINERALS
MONTMORILLONITE
NEAR INFRARED RADIATION
SERPENTINE
SPECTRAL REFLECTANCE
WATER
CHALCOGENIDES
CLAYS
ELECTROMAGNETIC RADIATION
HYDROGEN COMPOUNDS
INFRARED RADIATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IRON COMPOUNDS
IRON ORES
IRON OXIDES
MATERIALS
OPTICAL PROPERTIES
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLANETS
RADIATIONS
SILICATE MINERALS
TRANSITION ELEMENT COMPOUNDS
640107* - Astrophysics & Cosmology- Planetary Phenomena