Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986plas.rept..102l&link_type=abstract
In NASA, Washington Reports of Planetary Astronomy, 1985 p 102-103 (SEE N87-12407 03-89)
Astronomy and Astrophysics
Astronomy
Absorption Spectra, Cosmic Dust, Hydration, Infrared Spectra, Stellar Spectrophotometry, Thermal Mapping, Asteroids, Comets, Stellar Occultation, Water
Scientific paper
A positive correlation was found between the strength of the 3-micron water feature and the strength of the absorption feature shortward of 0.4 microns. This is similar to what is seen in laboratory spectra of carbonaceous chondrites whose silicate compositions range from hydrated phyllosilicates to anhydrous olivine. Features were found in the IRAS images that appear to be related to solar system objects. Analysis of the data has yielded narrow trails of dust coincident with the orbits of comets Temple 2, Encke, and Gunn. Dust is found both ahead and behind comet orbital positions due to low-velocity ejection of large particles during perihelion passage. The occultation diameters of Ceres and Pallas were used to improve the standard thermal model used in the reduction of thermal IR observations of asteroids.
Lebofsky Larry A.
Rieke George H.
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