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New results from ground-based observations of asteroid 21 Lutetia prior to the Rosetta fly-by

Lara, L. M.; Duffard, R.; de León, J.

On its journey to comet 67P/Churyumov-Gerasimenko, the International Rosetta Mission (ESA) was planned to fly-by two asteroids: (2867) Steins and (21) Lutetia. (21) Lutetia was encountered on July 10th 2010. Although classified as an M-type asteroid due to its high albedo, its reflectance spectrum in the near and mid-infrared region, suggests a pr…