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Colorimetry and magnitudes of asteroidsIn the present paper, 1500 UBV observations are analyzed by a new rather general multiple scattering theory which provided clear insight into previously poorly-recognized optical nature of asteroid surfaces. Thus, phase curves are shown to consist of a surface-texture controlled component, due to singly scattered light, and a component due to multiple scattering. Phase curve shapes can be characterized by a single parameter, the multiple scattering factor, Q. As Q increases, the relative importance of the opposition effect diminishes. Asteroid surfaces are particulate and strikingly similar to texture, being moderately porous and moderately rough on a scale greater than the wavelength of light. In concequence, Q (and also the phase coefficient) correlate well with geometric albedo, and there exists a purely photometric means of determining albedos and diameters.
Document ID
19800040389
Document Type
Other - Collected Works
Authors
Bowell, E. (Lowell Observatory Flagstaff, Ariz., United States)
Lumme, K. (Helsinki, University Helsinki, Finland)
Date Acquired
August 10, 2013
Publication Date
January 1, 1979
Subject Category
ASTRONOMY
Distribution Limits
Public
Copyright
Other