Christine Hartzell

TL;DR: The authors show the operational environment of asteroid Bennu, validate its photometric phase function and demonstrate the accelerating rotational rate due to YORP effect using the data acquired during the approach phase of OSIRIS-REx mission.

TL;DR: In this article, the scaling of physical forces to the extremely low ambient gravitational acceleration regimes found on the surfaces of small asteroids is performed, and it is found that van der Waals cohesive forces between regolith grains on asteroid surfaces should be a dominant force and compete with particle weights and be greater, in general, than electrostatic and solar radiation pressure forces.

TL;DR: Early measurements of numerous large candidate impact craters on near-Earth asteroid (101955) Bennu by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) mission indicate a surface that is between 100 million and 1 billion years old, predating Bennu's expected duration as a near Earth asteroid as mentioned in this paper.

TL;DR: The properties and behavior of particles ejected from Bennu are analyzed to determine the possible mechanisms of ejection and provide understanding of the broader population of active asteroids.

TL;DR: In this paper, the authors evaluate the electric field strength required to launch small particles given surface gravitation, cohesion and seismic shaking and find that the electric force required for dust particle launching is dominated by the cohesive force for micron-sized dust particles.