Orbit and bulk density of the OSIRIS-REx target Asteroid (101955) Bennu

  title={Orbit and bulk density of the OSIRIS-REx target Asteroid (101955) Bennu},
  author={S. Chesley and D. Farnocchia and M. Nolan and D. Vokrouhlicky and P. Chodas and A. Milani and F. Spoto and B. Rozitis and L. Benner and W. Bottke and M. Busch and J. Emery and E. Howell and D. Lauretta and J. Margot and P. A. Taylor},
  • S. Chesley, D. Farnocchia, +13 authors P. A. Taylor
  • Published 2014
  • Physics
  • Icarus
  • The target asteroid of the OSIRIS-REx asteroid sample return mission, (101955) Bennu (formerly 1999 RQ 36), is a half-kilometer near-Earth asteroid with an extraordinarily well constrained orbit. An extensive data set of optical astrometry from 1999 to 2013 and high-quality radar delay measurements to Bennu in 1999, 2005, and 2011 reveal the action of the Yarkovsky effect, with a mean semimajor axis drift rate da=dt ¼ð � 19:0 � 0:1 Þ� 10 
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