Triplicity and physical characteristics of Asteroid (216) Kleopatra

@article{Descamps2011TriplicityAP,
  title={Triplicity and physical characteristics of Asteroid (216) Kleopatra},
  author={Pascal Descamps and Franck Marchis and J{\'e}r{\^o}me Berthier and Joshua P. Emery and Gaspard Duch{\^e}ne and Imke de Pater and Michael H. Wong and Lucy F. Lim and Heidi B. Hammel and Fr{\'e}d{\'e}ric Vachier and P.Wiggins and J.-P. Teng-Chuen-Yu and Alexandre Peyrot and Joseph T. Pollock and Marcelo Assafin and Roberto Vieira-Martins and J. I. B. Camargo and F.Braga-Ribas and Bennie E. Macomber},
  journal={Icarus},
  year={2011},
  volume={211},
  pages={1022-1033}
}
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Many asteroids show absorption features diagnostic of hydrated minerals in the 3-μm region of the spectrum. Reflectance studies in this region can determine the hydration state of surface minerals
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TLDR
The unambiguous detection of a triple asteroidal system in the main belt, composed of a 280-km primary (87 Sylvia) and two small moonlets orbiting at 710 and 1,360 km, which was most probably formed through the disruptive collision of a parent asteroid.
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