Diameters and albedos of satellites of Uranus

Details Diameters and albedos of satellites of Uranus Diameters and albedos of satellites of Uranus

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.300..423b&link_type=abstract

Nature, vol. 300, Dec. 2, 1982, p. 423-425.

Computer Science

25

Albedo, Natural Satellites, Oberon, Size Determination, Uranus (Planet), Ariel, Calibrating, Diameters, Electrophotometers, Planetary Composition, Satellite Surfaces, Spectrophotometry, Titania, Umbriel

Scientific paper

Products of the masses of the five known satellites of Uranus, and estimates of their bulk densities and surface albedos, are used to infer their probable dimensions. Spectrophotometry has established the presence of water ice on the surfaces of all save Rhea, and the brightnesses of the satellites have been measured photoelectrically. The diameter measurements presented were made using a photometric/radiometric technique, whose recent recalibration, using independent solar system object measurements, has yielded absolute accuracies better than 5 per cent. The new albedo measurements show that Umbriel, Titania and Oberon are similar to the Jupiter moon Callisto, while Ariel resembles the Saturn moon Hyperion. The diameters of all four are similar to those of the large, icy Saturn satellites Rhea and Iapetus.

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