Physics – Optics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.4303j&link_type=abstract
American Astronomical Society, DPS meeting #42, #43.03; Bulletin of the American Astronomical Society, Vol. 42, p.1043
Physics
Optics
1
Scientific paper
The Rosetta spacecraft of the European Space Agency flew by the asteroid 21 Lutetia on July, 10, 2010 on its way to its final target, comet 67P/Churyumov-Gerasimenko. A total of 460 images have been acquired by OSIRIS during the flyby, with a minimum pixel scale of 64 m at closest approach (hereafter "CA") with the narrow angle camera. Several filters have been used, covering a wavelength range from the far UV (0.25 microns) to the end of the visible spectrum (1.0 microns). The phase angle went through 11°-0°-160°, reaching opposition 18 min before CA. We report here on a preliminary interpretation of the images of the asteroid acquired by OSIRIS, the imaging system aboard Rosetta. These images are combined with pre-flyby light curves and adaptive optics measurements to retrieve the shape and the rotational parameters of the asteroid. The bulk physical properties: size, surface, volume, moments of inertia, gravity field, are then extracted from the shape.
Besse Sebastien
Capanna C.
Carry Benoit
Faury Guillaume
Gaskell Robert
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