Azimuthal brightness variation and albedo measurements of the Uranian rings

Details Azimuthal brightness variation and albedo measurements of the Uranian rings Azimuthal brightness variation and albedo measurements of the Uranian rings

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9214979s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Dec. 30, 1987, p. 14979-14986.

Physics

10

Albedo, Satellite Surfaces, Uranus Rings, Brightness, Lambert Surface, Optical Thickness, Spacecraft Instruments, Voyager 2 Spacecraft

Scientific paper

The recent Voyager encounter with Uranus has produced new insights and observational constraints on the structure, composition, and evolution of the Uranian rings. Careful measurements have been made of the brightness variation as a function of longitude for the alpha, beta, gamma, delta, and epsilon rings. These measurements showed a substantial variation in azimuthal brightness because of the varying width of the rings. The single scattering albedo of the epsilon ring particles was found to be 3.9 + or - 0.6 percent (for the Lambert surface) or 2.3 + or - 0.4 percent assuming the 'lunar-type' phase function. The optical depth at apoapse of the epsilon ring was found to be 0.40 + or - 0.05.

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