出典:Wikipedia
出典:『Wikipedia』 (2011/06/10 11:44 UTC 版)
D-type asteroids have a very low albedo and a featureless reddish electromagnetic spectrum. It has been suggested that they have a composition of organic rich silicates, carbon and anhydrous silicates, possibly with water ice in their interiors. D-type asteroids are found in the outer asteroid belt and beyond; examples are 152 Atala, 588 Achilles, 624 Hektor and 944 Hidalgo.