Computer Science
Scientific paper
Feb 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.283..840g&link_type=abstract
Nature, vol. 283, Feb. 28, 1980, p. 840-842.
Computer Science
45
Albedo, Asteroids, Kerogen, Planetary Composition, Spectral Reflectance, Carbonaceous Chondrites, Optical Properties, Planetary Evolution, Spectrum Analysis, Surface Properties, Asteroids, Trojan Asteroids, Composition, C Asteroids, Albedo, Spectrum, Organic Compounds, Reflectivity, Wavelengths, Models, Hidalgo Asteroid, Agamemnon Asteroid, Hektor Asteroid, Comets, Priamus Asteroid, Achilles Asteroid, Lumen Asteroid, Murchison Meteorite, Polarimetry, Photometry, Comparisons, Carbonaceous Chondrites
Scientific paper
Consideration is given to the composition of those Trojan asteroids, Hilda asteroids and 944 Hidalgo with very low albedos and spectral reddening between 0.4 and 1.1 microns with respect to the C asteroids, termed RD objects. It is proposed that the albedo and reddening of these objects can be explained by the presence of very opaque, very red, polymer-type organic compounds structurally similar to kerogen, presumably resulting from Fischer-Tropsch-type reactions in the early solar nebula. The spectra and various mixtures of powdered montmorillonite, magnetite, coal-tar residue containing kerogen substances and carbon black are shown to provide a good match to the RD asteroid spectral properties. It is suggested that the nonsoluble carbonaceous residue may have required lower temperatures for its formation and preservation than carbonaceous materials in the carbonaceous chondrites and C asteroids, and thus explain the absence of RD objects closer than 4 AU from the sun.
Gradie Jonathan
Veverka Joe
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