Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986plas.rept...20b&link_type=abstract
In NASA, Washington Reports of Planetary Astronomy, 1985 p 20 (SEE N87-12407 03-89)
Astronomy and Astrophysics
Astronomy
Ice, Icy Satellites, Jupiter Satellites, Satellite Atmospheres, Saturn Satellites, Spectral Reflectance, Uranus Satellites, Ammonia, Carbon Monoxide, Clathrates, Methane, Sulfur Compounds
Scientific paper
It is proposed to measure the reflectance spectra of the icy satellites of Jupiter, Saturn and Uranus in the spectral region 1.8 to 2.4 micrometers. These observations use the new Cooled Grating Array Spectrometer using a 32-element InSb photodiode array detector and produce spectra of higher resolution and precision than any data yet obtained; the ultimate scientific objective is to search for the signatures of methane clathrate, ammonium hydroxide or carbon monoxide clathrate (compounds predicted to exist on icy surfaces in the outer solar system by several theories of formation of these bodies) in the region of the spectrum where water ice has a relative maximum in reflectance. At the very least, these data will allow upper limits to be placed on the amount of these chemical species that can be present. The specific targets is Europa, Ganymede, Enceladus, Ariel and Titania, bodies that have the highest probability of having some or all of these volatiles on their surface according to current formation models.
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