1. Ge/Ay133 What can the asteroid belt tell us about the early S.S.?
433 Eros ?
Phobos
Ge/Ay133

3. These types are not strongly separated, radially.

8. Comets are icy bodies that sublimate and become active when close to the Sun. They are believed to originate in two cold reservoirs beyond the orbit of Neptune: the Kuiper Belt (equilibrium temperatures of ~40 kelvin) and the Oort Cloud (~ 10 kelvin). We present optical data showing the existence of a population of comets originating in a third reservoir: the main asteroid belt. The main-belt comets are unlike the Kuiper Belt and Oort Cloud comets in that they likely formed where they currently reside and may be collisionally activated. The existence of the main-belt comets lends new support to the idea that main-belt objects could be a major source of terrestrial water.
See also

12. Asteroid Itokawa as imaged by the Hayabusa probe.

14. Collisions II

17. How do we measure rotation states?
Lightcurves (lots of objects)
Radar measurements (NEOs)
Spacecraft exploration
Toutatis Radar Image

19. What do simulations tell us about the asteroid belt?
Hard to generate observed properties with just Jupiter &
planetesimals or single large core, need mixture:
Jupiter inserted at 10 Myr

21. Radial mixing extends over several 0.1 AU
May help explain
the spatial overlap
of the various types?
What about the large
fraction of bodies
that are strongly
scattered?

22. Might the primordial disk have been more extensive?
May help explain
the spatial overlap
of the various types?
What about the large
fraction of bodies
that are strongly
scattered?

23. Are even more extreme scenarios possible?
The “Grand Tack” scenario…
… which attempts to examine the impact of extensive migration.

24. Are even more extreme scenarios possible?
Predicts extensive injection of “outer” planetesimals at >2 AU.
And a low mass for Mars.

25. What determines the water content of the inner S.S.?

26. D/H ratios argue that Oort cloud comets did not deliver the bulk of the water…

27. Suppose there is an initial snow line… What happens?

28. In such a story, the orbital properties of Jupiter are critical…

29. What sort of systems emerge?
Hierachical (most mass
added in large collisions),
so great variety, both
in orbital properties…
… and ultimate water content.

30. Question for later: What determines whether a planet is “habitable”?
How much can the water vary?
What is the maximum eccentricity for which liquid water can be maintained over several AE?