B-type asteroid
Asteroid spectral class; uncommon type of carbonaceous asteroid / From Wikipedia, the free encyclopedia
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B-type asteroids are a relatively uncommon type of carbonaceous asteroid, falling into the wider C-group; the 'B' indicates these objects are spectrally blue.[1] In the asteroid population, B-class objects can be found in the outer asteroid belt, and also dominate the high-inclination Pallas family which includes the third-largest asteroid 2 Pallas. They are thought to be primitive, volatile-rich remnants from the early Solar System. There are 65 known B-type asteroids in the SMASS classification,[2] and 9 in the Tholen classification as of March 2015.