Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...45..612s&link_type=abstract
Icarus, vol. 45, Mar. 1981, p. 612-617. NASA-supported research.
Astronomy and Astrophysics
Astronomy
30
Infrared Astronomy, Infrared Spectra, Natural Satellites, Near Infrared Radiation, Oberon, Satellite Surfaces, Spectrophotometry, Uranus Rings, Albedo, Frost, Spectral Reflectance, Titania, Umbriel, Water, Uranus, Satellites, Infrared, Spectrophotometry, Rings, Titania, Size, Oberon, Umbrial, Spectrum, Frost, Albedo, Surface, Observations, Data, Wavelengths, Reflectivity, Comparisons, Water, Methane, Ammonia, Pluto, Saturn, Iapetus, Radius
Scientific paper
New spectrophotometry from 1.5 to 2.5 microns is reported for the Uranian satellites Titania, Oberon, and Umbriel. A spectrum of the rings of Uranus from 2.0 to 2.4 microns is also reported. No evidence is found for frost covering the surface of the ring material, consistent with the low albedo of the rings previously reported by Nicholson and Jones (1980). The surfaces of the satellites are found to be covered by dirty water frost. Assuming albedos of the frost and gray components covering the Uranian satellites to be the same as the light and dark faces of Iapetus, radii are derived that are roughly twice those inferred from the assumption of a visual albedo of 0.5.
Matthews Keith
Neugebauer Gernot
Soifer Thomas B.
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