ISO observations of low and moderate albedo asteroids. PHT-P and PHT-S results

Details ISO observations of low and moderate albedo asteroids. PHT-P and PHT-S results ISO observations of low and moderate albedo asteroids. PHT-P and PHT-S results

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...393.1065d&link_type=abstract

Astronomy and Astrophysics, v.393, p.1065-1072 (2002)

Astronomy and Astrophysics

Astrophysics

18

Minor Planets, Asteroids, Infrared: Solar System

Scientific paper

The ISO observations presented here are devoted to low and moderate albedo asteroids, which are supposed to be among the more primitive objects of the solar system. Spectroscopic and multi-filter photometric data of 77 Frigga, 114 Kassandra, 308 Polyxo, 511 Davida, and 914 Palisana have been obtained by the ISO instrument ISOPHOT. The subsystem PHT-P carried out photometric observations at 10, 12, 25, and 60 mu m, while low resolution spectra have been acquired by the subsystem PHT-S between 5.8 and 11.6 mu m. The Standard Thermal Model and a black-body fit have been applied to the obtained data in order to model the thermal continuum and to derive sub-solar and black-body temperatures. To interpret the obtained results and to investigate the surface composition of the observed asteroids, we compare the ISO spectra with the whole sample of mineral and meteorite laboratory spectra available in the literature. New laboratory experiments performed at the Capodimonte Observatory have been carried out to increase the available sample. A tentative spectral similarity with meteorites is presented. Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the UK) with the participation of ISAS and NASA.

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