221628 Hyatt

It was discovered on 26 December 2006, by Alex Gibbs, an American software engineer with the Catalina Sky Survey, who named it after his father and renowned physicist Hyatt M.

[2] Hyatt has not been observed by any of the space-based surveys such as the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission.

Based on a generic magnitude-to-diameter conversion, it measures approximately 7.4 kilometers in diameter for an absolute magnitude of 14.4, and an assumed albedo of 0.057.

[2] This minor planet was named by the discoverer after his father, Hyatt M. Gibbs (1938–2012), who was a physicist and professor at the University of Arizona College of Optical Sciences.

[1] The official naming citation was published by the Minor Planet Center on 3 July 2012 (M.P.C.