The relative reflectance of Iapetus at 1.6 and 2.2 microns

Details The relative reflectance of Iapetus at 1.6 and 2.2 microns The relative reflectance of Iapetus at 1.6 and 2.2 microns

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85..969v&link_type=abstract

Astronomical Journal, vol. 85, July 1980, p. 969-972.

Astronomy and Astrophysics

Astronomy

4

Albedo, Iapetus, Infrared Astronomy, Infrared Reflection, Planetary Surfaces, Spectral Reflectance, Carbonaceous Chondrites, Infrared Spectrophotometers, Light Curve, Planetary Structure, Solar Position, Saturn, Satellites, Iapetus, Reflectance, Infrared, Wavelengths, Ice, Surface, Composition, Brightness, Emissions, Albedo, Data, Observations, Comparisons, Analysis

Scientific paper

Iapetus was observed at 0.56, 1.6, and 2.2 microns near seven elongations. The infrared reflectance at 2.2 microns relative to 0.56 microns varies from 0.6 to 1.6 (plus or minus 0.1). The low infrared reflectance of the trailing hemisphere of Iapetus is consistent with the previous identification of water ice as the composition of the bright surface. The high infrared reflectance of the leading hemisphere indicates a dark material that is too red to be consistent with a carbonaceous chondritic or 'C'-type surface composition.

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