Saturn's clay

We have a couple comments about the Carbonaceous Chrondrites on this blog. Most important for us is how they got over here, given that Chicxulub looks like one of them. Jupiter nudged a few, last I looked, into Earth-crossing orbits, very early in the Solar System's life.

A few days ago, when I was busy with other things, we got a report on where they came from originally. They think: about where Saturn is at now, or beyond, so 10+ AU.

The problem with the Carbonaceous Chrondrites we've found so far is that they are not enriched in volatiles (water, ammonia, CO₂, methane . . .), like those iceballs orbiting Saturn, which iceballs probably formed beyond 10 AU to oust the system Saturn formed with. The solution is that entry into Earth's orbit baked the clay. I'd add that hangin' around an Earth-crossing orbit before actually, like, crossing Earth might also take in some irradiation and bake-off if orbiting a few million years, which will correspond to a few million orbits - divided by 4.6 if a Ceres-like.

On topic of Ceres here's another takeaway: the surface materials of asteroids having 3.1 μm absorption features and CCs can originate from different regions of a single, water-rock-differentiated parent body. So: a doomed protoplanet like Theia but forming (even) further out, launching into the inner system, then breaking against something like Vesta...?