Željko Ivezić et al. 2002 The Astronomical Journal 124 2943 doi:10.1086/344077
Željko Ivezić1, Robert H. Lupton1, Mario Jurić1,2,5, Serge Tabachnik1, Tom Quinn3, James E. Gunn1, Gillian R. Knapp1, Constance M. Rockosi3 and Jonathan Brinkmann4
Show affiliationsWe discuss optical colors of 10,592 asteroids with known orbits selected from a sample of 58,000 moving objects observed by the Sloan Digital Sky Survey. This is more than 10 times larger than any sample that includes both orbital parameters and multiband photometric measurements previously available. We confirm that asteroid dynamical families, defined as clusters in orbital parameter space, also strongly segregate in color space. In particular, we demonstrate that the three major asteroid families (Eos, Koronis, and Themis) together with the Vesta family represent four main asteroid color types. Their distinctive optical colors indicate that the variations in chemical composition within a family are much smaller than the compositional differences between families, and they strongly support earlier suggestions that asteroids belonging to a particular family have a common origin. We estimate that over 90% of asteroids belong to families.
Issue 5 (2002 November)
Received 2002 May 31, accepted for publication 2002 August 5
Željko Ivezić et al. 2002 The Astronomical Journal 124 2943
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