Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988plas.rept...81l&link_type=abstract
In NASA, Washington, Reports of Planetary Astronomy, p 81-82 (SEE N89-16624 08-89)
Astronomy and Astrophysics
Astronomy
Asteroids, Astronomical Spectroscopy, Charon, Hydration, Ice, Infrared Spectroscopy, Mineralogy, Pluto (Planet), Thermodynamic Properties, Water, Albedo, Chemical Composition, Planetary Surfaces, Telescopes
Scientific paper
This program is a continuing effort to study the near infrared (reflected) to thermal infrared flux from asteroids and other airless bodies using groundbased telescopes. The goal of the observations is to investigate the mineralogy and thermophysical properties of these bodies and to support present and potential future missions. During the past year, researchers continued the search for water of hydration on asteroids. Their work has shown that water in the form of hydrated silicates does not exist on the surfaces of the outerbelt asteroids. This implies that the water we see on the c-class asteroids is most likely aqueous alternative products. That water in the ultraprimitive asteroids may be in the form of ice rather than water of hydration. Work continues on the thermal properties of asteroids. It was found that the lightcurve of 532 Herculina is done primarily to shape rather than the proposed surface albedo variation. In collaboration with other groups, researchers took advantage of the mutual events between Pluto and its satellite Charon; water ice was discovered on the surface of Charon. The surface composition of Pluto is being studied.
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