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{{#invoke:Hatnote|hatnote}} {{#invoke:Infobox|infobox}} 111 Ate is a main-belt asteroid that was discovered by the German-American astronomer C. H. F. Peters on August 14, 1870,<ref name="IAU_MPC"/> and named after Ate, the goddess of mischief and destruction in Greek mythology. In the Tholen classification system, it is categorized as a carbonaceous C-type asteroid, while the Bus asteroid taxonomy system lists it as an Ch asteroid.<ref name="DeMeo2009"/>

Two stellar occultations by Ate were observed in 2000, only two months apart. The occultation of the star HIP 2559 by 111 Ate was used to determine a chord length of 125.6 ± 7.2 km through the asteroid, giving a lower bound on the maximum dimension.<ref name="Devyatkin2008"/> During 2000, 111 Ate was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 135 ± 15 km.<ref name="icarus186_1_126"/> The estimated size of this asteroid is 143<ref name="Carry2012"/> km, making it one of the larger asteroids.

Based upon an irregular light curve that was generated from photometric observations of this asteroid at Pulkovo Observatory, it has a rotation period of 22.072 ± 0.001 hours and varies in brightness by 0.12 ± 0.01 in magnitude.<ref name="Pilcher2011"/>


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