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The asteroids preserve information from the earliest times in solar system history, with compositions in the population reflecting the material in the solar nebula and experiencing a wide range of temperatures. Today they experience ongoing processes, some of which are shared with larger bodies but some of which are unique to their size regime. They are critical to humanity's future as potential threats,...
Spin-forbidden pyroxene absorptions, detected in the visible wavelength range of the spectral data acquired of asteroid 4Vesta by the Visible and Infrared (VIR) Spectrometer onboard the Dawn spacecraft [1,2], provide valuable complementary information of the asteroidal surface composition. They can be used to verify the link of Vesta's surface composition to the HED meteorites. Further, these absorptions...
As the thermal environment experienced by the MESSENGER mission at Mercury has resulted to be warmer than was expected, the IR detectors on the Visible and Infrared Spectrograph (VIRS) onboard the spacecraft have recorded extremely large amounts of dark noise. In cases where data records include multiple consecutive dark observations, such as when the instrument is viewing the unilluminated surface...
We explored the statistical and compositional link between Chelyabinsk meteoroid and potentially hazardous Asteroid (86039) 1999 NC43 to investigate their proposed relation proposed by Borovička et al. (Borovička, J., et al. [2013]. Nature 503, 235–237). First, using a slightly more detailed computation we confirm that the orbit of the Chelyabinsk impactor is anomalously close to the Asteroid 1999...
The instruments on the Dawn spacecraft are exceptionally well suited to characterize and map the surface composition of Vesta in an integrated manner. These include a framing camera with multispectral capabilities, a high spectral resolution near-infrared imaging spectrometer, and a gamma-ray and neutron spectrometer. Three examples of issues addressed at Vesta are: (1) What is the composition of...
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