Yarkovsky effect


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Yarkovsky effect

[yär′käf·skē i‚fekt]
(astronomy)
The effect of a small particle's rotation on its orbit about the sun, due to anisotropic reradiation.
References in periodicals archive ?
[3] concluded that the Yarkovsky effect for the asteroid (99942) Apophis with two adopted values of A2: 25 x [10.sup.-15] au/[d.sup.2] and -25 x [10.sup.-15] au/[d.sup.2] cannot be detectable with the radar apparition in 2013.
Gentle but persistent nudging from the Yarkovsky effect might have pushed Apophis through the 2029 keyhole.
The Yarkovsky effect, the very slight momentum imparted by the radiation of heat from an asteroid's surface, might be used to slowly deflect an object that threatened the earth.
Over 10 million to 1 billion years, the Yarkovsky effect could nudge an asteroid by a few million kilometers, the researchers calculate.
This is called the Yarkovsky Effect, after the engineer who first identified it.
Named for the Russian engineer who discovered it a century ago, the Yarkovsky effect results from the way a spinning asteroid absorbs and reradiates solar energy.
Another factor that can alter an asteroid's path is the Yarkovsky effect. According to scientists, this phenomenon occurs when heat from an internal or external force affects the spin of an asteroid, which would then alter its trajectory.
The Yarkovsky effect happens simply because it takes time for things to heat up and cool down.
As on Earth, asteroid surfaces are hotter in the local afternoon, and the tiny excess of afternoon radiation pressure can gradually alter their orbits--a phenomenon called the Yarkovsky effect. These orbit changes can convert a main-belt asteroid into a NEO by bringing its orbit into resonance with Jupiter, which then perturbs it severely.
Another major factor that could affect the asteroid's trajectory is the (https://www.ibtimes.com/nasa-asteroid-tracker-1600-foot-bennu-may-hit-earth-scientists-study-neos-samples-2813143) Yarkovsky effect .
Known as the Yarkovsky effect, the heating and cooling cycle of a small body as it rotates and as its distance from the Sun changes can instigate long-term changes to the asteroid's orbit.