Computer Science
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop...71h&link_type=abstract
Spitzer Proposal ID #71
Computer Science
Scientific paper
We examine the principal satellites of outer Solar System planets, as well as Uranus, Neptune, and Pluto, using all SIRTF instruments. IRAC photometry will establish the hitherto unknown albedo of these cold objects at wavelengths between 3.5 and 8 microns, IRS will do reflectance spectrosopy at wavelengths between 5.3 and 15 um, and thermal emission spectroscopy between 10 and 40 um. Combined with MIPS photometry and SED measurements, these data willl provide compositional information, albedo, and thermal properties of these objects. All synchronous satellites are observed at leading and trailing hemispheres, while in addition the sub-Neptune hemisphere of Triton, and a series of follow-on measurements of this particularly interesting moon, are performed. The observations of Uranus and Neptune will be used to monitor atmospheric trends seen by HST and ISO, for trace composition data, and for precise straylight subtraction for observations of their innermost principal satellites. Observations of Titan will be examined for different spectral signatures of the hemisphere containing the "continent" seen in near-IR Hubble images compared to the trailing hemisphere, and interpreted in terms of surface composition and temperature.
Houck James R.
Van Cleve Jeffrey
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