Chandler wobble
The Chandler wobble is a small variation in Earth's axis of rotation, discovered by American astronomer Seth Carlo Chandler in 1891. It amounts to 0.7 arcseconds over a period of 433 days.
Chandler wobble -- A small motion in the Earth's rotation axis relative to the surface, discovered by American astronomer Seth Carlo Chandler in 1891. Its amplitude is about 0.
Chandler wobble (NASA Thesaurus) A movement in the Earth's axis of rotation whose period of motion is about 14 months. Used for Eulerian nutation.
UT0 is uncorrected; UT1 is corrected for the Chandler wobble; UT2 is corrected both for the Chandler wobble and for seasonal changes in Earth's rotation rate. [H76] ...
The Earth also suffers from the Chandler wobble.
Earth in the Solar System ...
In addition to an annual component to this motion, there is a 14-month cycle called the Chandler wobble. The rotational velocity of the Earth also varies in a phenomenon known as length of day variation.
 See also: Period, Earth, Satellite, Rotation, Planet
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