In the Face Book group:
Someone posted about the rotation of the asteroid Bennu. Its rate is accelerating slowly.
YORP effect is the Yarkovsky–O'Keefe–Radzievskii–Paddacki–Paddack (YORP) effect. Solar radiation is absorbed then emitted for a small off center torque.
This 'YORP' effect ' definition appears to ignore the solar wind. YORP effect is apparently observed in our solar system and it is a very small force. A description for YORP does does not explicitly separate how much rotation results from the light and how much from the solar wind. YORP effect assumes light and its photon particles provide the energy and force for the torque to rotate a body.
The solar wind is a stream of charged particles released from the upper atmosphere of the Sun, called the corona. This plasma consists of mostly electrons, protons and alpha particles with kinetic energy between 0.5 and 10 keV.
There is a conversion factor from keV to a newton-meter or joule.
When these particles (having mass) hit an asteroid the body must absorb that kinetic energy on impact (conservation of energy). If these impacts are off center then these impacts of very small positively charged particles should result in a very small torque. Light having only a massless photon should have no kinetic energy: KE = m * v^2 but with m=0 then KE = 0.
If this observed kinetic energy is more than the theoretical momentum calculated for light, based on wavelength should it be considered?
Is the YORP effect really exactly as currently described [with only light]?
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