Binary Asteroids in the Near-Earth Object Population

@article{Margot2002BinaryAI,
  title={Binary Asteroids in the Near-Earth Object Population},
  author={Jean-Luc Margot and Michael C. Nolan and Lance A. M. Benner and Steven Jeffrey Ostro and Raymond F. Jurgens and Jon D. Giorgini and Martin A. Slade and Donald B. Campbell},
  journal={Science},
  year={2002},
  volume={296},
  pages={1445 - 1448}
}
Radar images of near-Earth asteroid 2000 DP107 show that it is composed of an ∼800-meter-diameter primary and an ∼300-meter-diameter secondary revolving around their common center of mass. The orbital period of 1.755 ± 0.007 days and semimajor axis of 2620 ± 160 meters constrain the total mass of the system to 4.6 ± 0.5 × 1011 kilograms and the bulk density of the primary to 1.7 ± 1.1 grams per cubic centimeter. This system and other binary near-Earth asteroids have spheroidal primaries… 

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