Maps of the rings of Uranus at a wavelength of 2.2 microns

Details Maps of the rings of Uranus at a wavelength of 2.2 microns Maps of the rings of Uranus at a wavelength of 2.2 microns

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...52..126m&link_type=abstract

Icarus, vol. 52, Oct. 1982, p. 126-135. NASA-NSF-supported research.

Astronomy and Astrophysics

Astronomy

8

Astronomical Photometry, Infrared Astronomy, Planetary Mapping, Uranus Rings, Albedo, Astronomical Models, Brightness Distribution, Infrared Photometry, Near Infrared Radiation, Uranus, Maps, Rings, Wavelengths, Brightness, Epsilon Ring, Models, Optical Properties, Depth, Asymmetry, Infrared, Photometry, Albedo, Geometry, Observations, Flux, Density, Magnitude, Images, Photographs, Comparisons, Hypotheses, Ratios, Procedure

Scientific paper

Maps of the ring system of Uranus, as seen in reflected sunlight at a wavelength of 2.2 microns, are presented for May 1978 and July 1979. Large azimuthal brightness variations revealed by these maps are consistent with the variable width established for the epsilon ring from occultation studies and support the existing elliptical model for this ring. An upper limit of approximately 0.010 is placed on the normal optical depth of any broad (approximately 5000 km wide) axisymmetric ring component. There exists, however, an unexplained east-west asymmetry in the May 1978 map. In addition, multiaperture broadband infrared photometry of Uranus is reported, from which the geometric albedo of the planet at wavelengths of 1.25, 1.65, and 2.2 microns and the geometric albedo of the rings at 2.2 microns are derived.

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