dtype010.html

Primitive Main Belt Asteroids

The asteroid belt (AB) shows a wide range chemical compositions.
- Highly processed objects
  - Mainly on inside.
  - E-types are very dry.
  - S-types have been strongly heated.
- Organic-rich objects on outside.
  - D- and P-types
  - Look like dormant cometary nuclei.
Has traditionally been interpreted as indicating physical changes in the solar nebula.
- Warm on the inside, cold on the outside.
- With a very fast transition just where we see the AB.
However, it has recently been argued that Trojans were captured from much farther out
(15-30AU, Morbidelli et al. 2005).
- Could this apply to other primitive objects too?

7.3x10^-12Mpc

2.4x10^-11Mpc