Coherent backscatter and the opposition effect for E-type asteroids

Details Coherent backscatter and the opposition effect for E-type asteroids Coherent backscatter and the opposition effect for E-type asteroids

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993p%26ss...41..173m&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 41, no. 3, p. 173-181.

Computer Science

36

Asteroids, Backscattering, Coherent Scattering, Grain Size, Light Scattering, Regolith, Satellite Surfaces, Solar Radiation, Solar System, Asteroids, E Asteroids, Backscatter, Nysa, Angelina, Brightness, Size, Surface, Composition, Regolith, Grains, Refractive Index, Amplitude, Theoretical Studies, Calculations, Parameters

Scientific paper

Recently, Harris et al. (1989) have observed a strong and unusually narrow (HWHM approximately 0.8 deg in the yellow) opposition effect for high-albedo asteroids 44 Nysa and 64 Angelina. In this paper, we apply the theory of coherent backscattering of light from discrete random media to interpret this remarkable opposition brightening. It is shown that coherent backscattering of sunlight from a regolithic layer composed of submicrometer-sized grains with an index of refraction close to that of the mineral enstatite can be a reasonable explanation of the observed opposition effect.

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