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Rotational variation of the spectral slope of (21) Lutetia, the second asteroid target of ESA Rosetta mission

Barbieri, C.; Barucci, M. A.; Lazzarin, M. +5 more

The ESA Rosetta mission, launched in 2004 March, will flyby the second asteroid target (21) Lutetia in 2010 July. This asteroid is quite different from (2867) Steins, encountered by Rosetta in 2008 September. Lutetia is in fact a much larger asteroid, approximately 100km of diameter, as compared to the 5 km of Steins and also its surface compositi…