Other
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..141m&link_type=abstract
The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 141
Other
16
Asteroids, Ceres, Thermal Emission
Scientific paper
In support for the ISO Mission it has been necessary to establish a set of asteroids as photometric standards for the photometric calibration of the instruments ( te{Mueller:98a}). The new standards are described as rotating ellipsoids. Illumination geometry, heat transfer due to non-zero thermal inertia and surface structure/porosity are taken into account. The characteristic properties of this new thermophysical model (TPM) can be found in te*{Lagerros:96a,Lagerros:97a,Lagerros:97b}. Here we apply the TPM to a set of ISO observations on (1) Ceres to derive its thermophysical properties. We determine the thermal inertia, the beaming function, caused by surface roughness and porosity, and the wavelength dependent emissivity. Since we are able to model the full thermal emission over the wavelengths range from 5 to 200 μm, we believe that our findings represent fundamental thermal emission properties not only of (1) Ceres, but also of other Main-Belt asteroids.
Burgdorf Martin
Lagerros Johan S. V.
Lim Tanya
Morris Pat W.
Müller Thomas G.
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