Computer Science
Scientific paper
Nov 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995icar..118...87c&link_type=abstract
Icarus, Vol. 118, No. 1, p. 87 - 104
Computer Science
64
Titan: Albedo
Scientific paper
The authors report observations of Titan covering the 1.075-, 1.28-, 1.6-, and 2.0-μm windows which show variations with the orbital phase, implying variability of the satellite's geometric albedo. The data sets cover Titan's Greatest Western Elongation and opposite Conjunctions. The authors find Titan's geometric albedo to be about the same (0.29) at 1.28 and 1.075 μm. The geometric albedos in the 1.6- and 2.0-μm methane windows on Titan are clearly lower (0.20 and 0.16, respectively). At the four wavelengths, a noticeable decrease in geometric albedo is observed near Greatest Western Elongation with respect to Inferior and Superior Conjunctions. The sum of the existing Titan data point to a bright leading side and a darker trailing one. Despite important uncertainties in the value of the CH4 absorption coefficients in the window regions, modeling Titan's observed albedos strongly suggests the existence of a surface material with a comparable albedo at 1.075 and 1.28 μm (0.4 - 0.5) but much darker at 1.6 and 2.0 μm (about 0.2).
Coustenis Athena
Lellouch Emmanuel
Maillard Jean Pierre
McKay Chris P.
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