 However, only one hemisphere of Mathilde was imaged during the fly-by.This was only the third asteroid to be imaged from a nearby distance, following 951 Gaspra and 243 Ida.Mathilde is very dark, with an albedo comparable to fresh asphalt, and is thought to share the same composition as CI1 or CM2 carbonaceous chondrite meteorites, with a surface dominated by phyllosilicate minerals.