Asteroid 4478, Blanco, was discovered on April 23, 1984 by Walter Ferreri and Vincenzo Zappalą at La Silla. It has a period of 3 years, 136 days.
It was named for Italian astronomer Carlo Blanco.
Astrologically, Raymond Scott (formerly Andrews) has linked it with white, Caucasian; also, we may see it as denied support crudely and unfairly, preoccupation with purity.