284 Amalia is a large main beltasteroid.[2] It was discovered by Auguste Charlois on 29 May 1889 in Nice. This is classified as a Ch-type asteroid in the Bus taxonomy[3] and CX in the Tholen system.[4] It has been observed occulting stars on five occasions as of 2018, which provide a diameter estimate of 54±3 km via a fitted ellipse plot.[5]