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Asteroid approach, Science operations begin!
stevesliva
post Yesterday, 02:06 PM
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You mention thermal and mechanical/gravity. There's also electrostatic...
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Gerald
post Yesterday, 02:09 PM
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Agreed, electrostatic charging due to solar UV may do it, as well. Even a weak repulsive force would be sufficient. I think, that 10V are considered reasonable in direct sunlight. Impacts of micrometeorites might be another approach. Tracking particles, and their acceleration due to solar radiation pressure and some potential weak electrostatic field could clarify the physics at work. Those fields would change with solar irradiation.
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Marcin600
post Yesterday, 07:11 PM
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Or maybe Bennu is a body reassembled from fragments scattered after a relatively recent breakdown by impact and it is still undergoing a rearrangement of its surface (creation of the equatorial ridge) under the influence of its own gravity. Such small surface movements could throw small particles into space (?)
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