A-type asteroid
Encyclopedia
A-type asteroids are relatively uncommon inner-belt asteroid
s that have a strong, broad 1 µm
olivine
feature and a very reddish spectrum shortwards of 0.7 µm. They are thought to come from the completely differentiated mantle
of an asteroid.
A-type asteroids are so rare that as of 2005 only 17 had been discovered.
Asteroid
Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...
s that have a strong, broad 1 µm
Micrometre
A micrometer , is by definition 1×10-6 of a meter .In plain English, it means one-millionth of a meter . Its unit symbol in the International System of Units is μm...
olivine
Olivine
The mineral olivine is a magnesium iron silicate with the formula 2SiO4. It is a common mineral in the Earth's subsurface but weathers quickly on the surface....
feature and a very reddish spectrum shortwards of 0.7 µm. They are thought to come from the completely differentiated mantle
Mantle (geology)
The mantle is a part of a terrestrial planet or other rocky body large enough to have differentiation by density. The interior of the Earth, similar to the other terrestrial planets, is chemically divided into layers. The mantle is a highly viscous layer between the crust and the outer core....
of an asteroid.
A-type asteroids are so rare that as of 2005 only 17 had been discovered.