Implications of temperature-dependent near-IR spectral properties of common minerals and meteorites for remote sensing of asteroids

Details Implications of temperature-dependent near-IR spectral properties of common minerals and meteorites for remote sensing of asteroids Implications of temperature-dependent near-IR spectral properties of common minerals and meteorites for remote sensing of asteroids

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1661h&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 12, p. 1661-1664

Physics

13

Planetology: Comets And Small Bodies: Radiation And Spectra, Planetology: Comets And Small Bodies: Remote Sensing, Planetology: Solar System Objects: Asteroids And Meteoroids

Scientific paper

Remote sensing analysis of common mafic silicates on bodies like asteroid 433 Eros may be in error unless temperature effects are considered. In this paper, spectral sensitivity to temperature as a function of wavelength from 0.4 to 2.5 microns is quantified using new measurements of reflectance spectra of olivine and two ordinary chondrites. The new data were obtained at higher temperature resolution and with greater accuracy than previous measurements. We use a simple thermal model to show that the temperature difference between terrestrial ambient conditions and those prevailing on main belt asteroids, as well as the temperature variations expected on the surfaces of individual asteroids during observations by spacecraft, are large enough to cause easily detectable spectral differences. Therefore, interpretations of asteroid spectra using spectra of minerals and meteorites obtained at terrestrial ambient conditions are suspect.

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