Τι (ποιος) είναι Q-type asteroid - ορισμός
Q-type asteroid
TYPE OF ASTEROID
Q-type asteroids
Q-type asteroids are relatively uncommon inner-belt asteroids with a strong, broad 1 micrometre olivine and pyroxene feature, and a spectral slope that indicates the presence of metal. There are absorption features shortwards and longwards of 0.
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.
