22577 Alfiuccio (provisional designation 1998 HT₅₁) is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 2.4 kilometers in diameter. It was discovered on 30 April 1998, by the Lowell Observatory Near-Earth-Object Search at Anderson Mesa Station in Flagstaff, Arizona, United States.^[5] It was named in memory of Alfio Grasso, an Italian boy from Sicily.^[2]

Alfiuccio is a member of the Flora family, one of the largest families of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 1.9–2.6 AU once every 3 years and 6 months (1,266 days). Its orbit has an eccentricity of 0.15 and an inclination of 4° with respect to the ecliptic.^[1]

The asteroid's observation arc begins 20 months prior to its official discovery observation, with a precovery taken at the Chinese Xinglong Station in December 1996.^[5]

This minor planet was named in memory of Alfio "Alfiuccio" Grasso (1992–2004) who died in a hunting accident on the slopes of Mount Etna, Italy. The body's name was proposed by C. Blanco and M. Di Martino.^[2] The official naming citation was published by the Minor Planet Center on 6 August 2009 (M.P.C. 66725).^[6]