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 3.6 g/cm3.[1]

List

A-type asteroids are so rare that as of February 2019, only 17 had been discovered:[2]

Designation Class Diam. Refs
246 Asporina main-belt 50.891 km MPC · JPL
289 Nenetta main-belt 37.586 km MPC · JPL
446 Aeternitas main-belt 53.562 km MPC · JPL
863 Benkoela main-belt 38.724 km MPC · JPL
1126 Otero main-belt 10.974 km MPC · JPL
1600 Vyssotsky main-belt 7.413 km MPC · JPL
1951 Lick Mars-crossing 5.57 km MPC · JPL
2234 Schmadel main-belt 9.473 km MPC · JPL
2423 Ibarruri Mars-crossing 4.899 km MPC · JPL
2501 Lohja main-belt 10.218 km MPC · JPL
2715 Mielikki main-belt 13.252 km MPC · JPL
2732 Witt main-belt 11.001 km MPC · JPL
3352 McAuliffe Amor 2.1 km MPC · JPL
4142 Dersu-Uzala Mars-crossing 7.1 km MPC · JPL
4713 Steel main-belt 6.286 km MPC · JPL
4982 Bartini main-belt 7.975 km MPC · JPL
5641 McCleese Mars-crossing 5.68 km MPC · JPL
Diameter: averaged estimates only; may change over time

See also

References

  1. ^ P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
  2. ^ "JPL Small-Body Database Search Engine: spec. type = A (SMASSII)". JPL Solar System Dynamics. Retrieved 2019-03-17.

External links


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