308 Polyxo: ISO-SWS spectrum up to 26 micron
Barucci, M. A.; Dotto, E.; Müller, T. G.; Brucato, J. R.; Carvano, J.
Italy, France, Germany, Brazil
Abstract
Infrared spectroscopic observations of the asteroid 308 Polyxo have been carried out by the Infrared Space Observatory (ISO) with the Short Wavelength Spectrometer (SWS) in the spectral region between 7 and 26 μm. The Standard Thermal Model and the Thermophysical Model have been applied to the obtained data in order to model the thermal continuum. Sub-solar and black-body temperatures also have been derived. The obtained spectrum has been compared with laboratory spectra of minerals and meteorites available in the literature. Moreover, we performed new measurements to obtain infrared spectra of the Tagish Lake meteorite, recognized as the best analog of primitive D-type asteroids. A tentative spectral similarity with the Ornans meteorite is suggested, while we cannot confirm, in the considered wavelength range, the analogy with the Tagish Lake meteorite.
Table \ref{tbl:obslog} is only available in electronic form at http://www.edpsciences.org Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, The Netherlands and UK) and with the participation of ISAS and NASA.