Asteroid 21527, Horton, was discovered on June 24, 1998 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro, New Mexico. It has a period of 4 years, 53 days.
It was named for Hotchkiss, Colorado high school student Douglas Ray Horton (born 1988), who was awarded second place in the 2006 Intel International Science and Engineering Fair for his zoology project.
The meaning of asteroid Horton seems to be: loyalty being abused or prompting criticism, a stickler for duty and trustworthiness.