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

By S. Chesley, D. Farnocchia, M. Nolan, David Vokrouhlický, P. Chodas, Andrea Milani, Federica Spoto, B. Rozitis, L. Benner, William Bottke and 6 more. 2014

251 citations recorded by the source corpus.

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

Subfields: Astronomy and Astrophysics, Atmospheric Science

View Paper: https://www.semanticscholar.org/paper/773a18d7c63ad934e2fc8eb1b23cecd9d057ef56

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Citations in the corpus

In search of the source of asteroid (101955) Bennu: Applications of the stochastic YORP model (2015, background): “Detection of the orbital displacement produced by the Yarkovsky effect on Bennu has also led to an estimate of its bulk density, which is q ¼ 1:26 0:21 g cm 3 (Chesley et al., 2014).”
Rubble Pile Asteroids (2018, methodology): “For objects with both a shape measurement and a decades long measurement of its orbital drift rate by the thermal Yarkovsky effect, which is dependent on mass, a mass and density estimate can be made, as it was done for near-Earth asteroid Bennu (Chesley et al. 2014).”
OCAMS: The OSIRIS-REx Camera Suite (2017, background): “While the expected position of Bennu has an uncertainty of a few km (Milani et al. 2009; Chesley et al. 2014), a campaign to acquire the asteroid from a range of some 2 million km will begin in August 2018.”
OSIRIS-REx: Sample Return from Asteroid (101955) Bennu (2017, methodology): “Bennu is also one of the most potentially hazardous of all the currently known NEAs, based on its size and calculable nonzero probability of future impacts with Earth (Chesley et al. 2014).”
Asteroid family ages (2015, background): “Thus in the Table the density at D = 1 km for B class is the one of Bennu from (Chesley et al., 2014), the ones for the other classes are obtained by scaling.”
The OSIRIS‐REx target asteroid (101955) Bennu: Constraints on its physical, geological, and dynamical nature from astronomical observations (2015, methodology): “Chesley et al. (2014) determined Bennu’s orbit to unprecedented precision using a high-fidelity force model to compute the asteroid’s trajectory.”