(394130) 2006 HY51 is an outstandingly eccentric asteroid and near-Earth object of the Apollo group, approximately 1.2 kilometers in diameter. It was discovered by LINEAR at Lincoln Lab's ETS on 26 April 2006. The asteroid orbits the Sun at a distance of 0.1–5.1 AU once every 4 years and 2 months (1,530 days). Its orbit has an eccentricity of 0.97 and an inclination of 31° with respect to the ecliptic. As of 2016, the asteroid's effective size, its composition and albedo, as well as its rotation period and shape remain unknown.