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Cometary Grain Scattering versus Wavelength, or, ``What Color Is Comet Dust?''

Jewitt, David; Meech, Karen J.

Optical and near-infrared observations of comets are combined in a systematic study of the wavelength dependence of the scattering from cometary grains. The normalized rate of change of the reflectivity of cometary grains with respect to the wavelength of observations decreases as the wavelength increases. The observed wavelength dependence of the…