Evidence from Voyager II photometry for early resurfacing of Umbriel

Details Evidence from Voyager II photometry for early resurfacing of Umbriel Evidence from Voyager II photometry for early resurfacing of Umbriel

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.338..324h&link_type=abstract

Nature (ISSN 0028-0836), vol. 338, March 23, 1989, p. 324-326.

Astronomy and Astrophysics

Astronomy

8

Astronomical Photometry, Satellite Surfaces, Umbriel, Voyager 2 Spacecraft, Albedo, Tectonics, Topography, Uranus, Umbriel, Satellites, Voyager 2 Mission, Spacecraft Observations, Photometry, Resurfacing, Albedo, Surface, Features, Patterns, Tectonics, Imagery, Procedure, Techniques, Brightness, Parameters, Topography, Stratigraphy

Scientific paper

New Voyager II albedo maps of Umbriel are presented which reveal that its surface is subdivided into low-contrast, crudely polygonal areas ranging in size from tens to hundreds of km. The largest polygons are elongate with systematically trending northeast-southwest boundaries. Some of the polygonal areas form topographic depressions several km in depth. It is suggested that this newly discovered global albedo pattern is a relic of the early tectonic disruption of Umbriel's surface.

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