Images of Asteroid 21 Lutetia: A Remnant Planetesimal from the Early Solar System

@article{Sierks2011ImagesOA,
  title={Images of Asteroid 21 Lutetia: A Remnant Planetesimal from the Early Solar System},
  author={H. Sierks and P. Lamy and C. Barbieri and D. Koschny and H. Rickman and R. Rodrigo and M. A’Hearn and F. Angrilli and M. Barucci and J. Bertaux and I. Bertini and S. Besse and B. Carry and G. Cremonese and V. Da Deppo and B. Davidsson and S. Debei and M. De Cecco and J. de Le{\'o}n and F. Ferri and S. Fornasier and M. Fulle and S. Hviid and R. Gaskell and O. Groussin and P. Gutierrez and W. Ip and L. Jorda and M. Kaasalainen and H. Keller and J. Knollenberg and R. Kramm and E. K{\"u}hrt and M. K{\"u}ppers and L. Lara and M. Lazzarin and C. Leyrat and J. Moreno and S. Magrin and S. Marchi and F. Marzari and M. Massironi and H. Michalik and R. Moissl and G. Naletto and F. Preusker and L. Sabau and W. Sabolo and F. Scholten and C. Snodgrass and N. Thomas and C. Tubiana and P. Vernazza and J. Vincent and K. Wenzel and T. Andert and M. P{\"a}tzold and B. Weiss},
  journal={Science},
  year={2011},
  volume={334},
  pages={487 - 490}
}
A spacecraft flyby of an asteroid reveals a high-density body that is more like a planetesimal than a rubble pile. Images obtained by the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) cameras onboard the Rosetta spacecraft reveal that asteroid 21 Lutetia has a complex geology and one of the highest asteroid densities measured so far, 3.4 ± 0.3 grams per cubic centimeter. The north pole region is covered by a thick layer of regolith, which is seen to flow in major… Expand
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