Qué (quién) es R-type asteroid - definición
R-type asteroid
TYPE OF ASTEROID
R-type asteroids
R-type asteroids are moderately bright, relatively uncommon inner-belt asteroids that are spectrally intermediate between the V and A-type asteroids. The spectrum shows distinct olivine and pyroxene features at 1 and 2 micrometres, with a possibility of plagioclase.
D-type asteroid
TYPE OF ASTEROID
D type asteroid; Type-D asteroid; D-type asteroids
D-type asteroids have a very low albedo and a featureless reddish 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.
A-type asteroid
ASTEROID CLASS
A type asteroid; A-type asteroids
A-type asteroids are relatively uncommon inner-belt asteroids that have a strong, broad 1 μm olivine feature and a very reddish spectrum shortwards of 0.7 μm.
