Yarkovsky effect


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Yar·kov·sky effect

 (yär-kôv′skē)
n.
The anisotropic emission of light from very small solar system bodies, whose photons often carry away enough momentum to alter the orbits of the bodies.
References in periodicals archive ?
Aside from gravitational keyholes, another factor that can affect an asteroid's flight path is the Yarkovsky effect. This occurs when heat from various sources such as sunlight alters the spin of an asteroid.
Scientists also hope to study the "Yarkovsky effect" which suggests that small rocky space objects may be affected by the Sun's energy.
[2] investigate the possibility of detecting the Yarkovsky effect via precise orbit determination of the near-earth asteroids on example of the asteroids 6489 Golevka, 1620 Geographos, 1566 Icarus, and 1998 KY26 with different values of the parameter da/dt.
Those included flying a spacecraft near the asteroid for a long time to act as a "gravity tractor" and pull it off course (deemed ineffective, unsurprisingly); using a large mirror to focus sunlight and "boil off" some material from the asteroid; a spacecraft "rendezvous" with the asteroid to "boil off" some material using a "pulse laser"; landing on the asteroid, drilling into it, and "eject[ing] material from PHO at high velocity"; "attach[ing]" a spacecraft to the asteroid and pushing it out of the way; and what NASA called the "Enhanced Yarkovsky Effect" - altering the reflectiveness of a rotating asteroid and counting on the "radiation from sunheated material" to push the asteroid off course.
Adding to the uncertainty was the Yarkovsky effect, a subtle radiation-pressure force caused by the uneven way that a spinning body absorbs sunlight and re-radiates the heat back into space.
A phenomenon called the Yarkovsky Effect may affect asteroid orbits.
Scientists think this principle, called the Yarkovsky effect, could be altered by painting an asteroid a less heat-absorbing color like white to alter its natural orbit.
They cannot predict if the asteroid will hit earth because of what is known as the Yarkovsky effect - the way the asteroid reflects sunlight - which can have a major influence on its orbit.
Named for the engineer who discovered the phenomenon a century ago, the Yarkovsky effect stems from the way a spinning asteroid absorbs and reradiates solar energy.
One of these is the Yarkovsky effect. According to this concept, an asteroid's trajectory can change if external or internal heat sources affect its spin.