Surface properties of asteroids - A synthesis of polarimetry, radiometry, and spectrophotometry

Details Surface properties of asteroids - A synthesis of polarimetry, radiometry, and spectrophotometry Surface properties of asteroids - A synthesis of polarimetry, radiometry, and spectrophotometry

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975icar...25..104c&link_type=abstract

Icarus, vol. 25, May 1975, p. 104-130.

Astronomy and Astrophysics

Astronomy

73

Asteroids, Astronomical Photometry, Chemical Composition, Infrared Radiometers, Polarimetry, Surface Properties, Albedo, Colorimetry, Mineralogy, Planetary Surfaces, Spectrophotometry, Tables (Data)

Scientific paper

Surface compositions of 110 asteroids are analyzed using data obtained by polarimetry and visible and near-IR spectrophotometry. A comparison of albedos and diameters determined by polarimetry and radiometry indicates that a slight upward revision of the radiometric albedo scale is necessary. Reliable adopted albedos and diameters are presented for 56 objects, and rough diameters are obtained for 52 additional objects. More than 90% of the asteroids are shown to fall into two broad groups (C and S) which are compositionally similar to carbonaceous and stony meteorites, respectively. C-type asteroids are found to predominate in the asteroid belt, and the largest of these (Ceres, Pallas, Hygiea, Davida) may be metamorphosed. It is shown that Vesta may be the only differentiated asteroid remaining intact in the belt. The results support the conclusions that asteroids and meteorites have similar classes of mineral assemblages, but the distribution of asteroid types contrasts with the distribution of major meteorite types found on earth.

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