A-type asteroid

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. They are thought to come from the completely differentiated mantle of an asteroid, and appear to have a high density. One survey found that 7 similar A-, V- and X-type asteroids had an average density of Template:Val.<ref name=VLT>P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56 </ref>

List

A-type asteroids are so rare that as of August 2024, only 17 had been discovered:<ref name="SBDB">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Designation	Class	Diam.	Refs
246 Asporina	Template:Small	Template:Small	Template:Small
289 Nenetta	Template:Small	Template:Small	Template:Small
446 Aeternitas	Template:Small	Template:Small	Template:Small
863 Benkoela	Template:Small	Template:Small	Template:Small
1126 Otero	Template:Small	Template:Small	Template:Small
1600 Vyssotsky	Template:Small	Template:Small	Template:Small
1951 Lick	Template:Small	Template:Small	Template:Small
2234 Schmadel	Template:Small	Template:Small	Template:Small
2423 Ibarruri	Template:Small	Template:Small	Template:Small
2501 Lohja	Template:Small	Template:Small	Template:Small
2715 Mielikki	Template:Small	Template:Small	Template:Small
2732 Witt	Template:Small	Template:Small	Template:Small
3352 McAuliffe	Template:Small	Template:Small	Template:Small
4142 Dersu-Uzala	Template:Small	Template:Small	Template:Small
4713 Steel	Template:Small	Template:Small	Template:Small
4982 Bartini	Template:Small	Template:Small	Template:Small
5641 McCleese	Template:Small	Template:Small	Template:Small
Diameter: averaged estimates only; may change over time

See also

• Asteroid spectral types

External links

• Mineralogic and Temperature-Induced Spectral Investigations of A-type Asteroids: (246) Asporina and (446) Aeternitas, V. Reddy, Lunar and Planetary Science XXXVI (2005)

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