[FPSPACE] KT Impactor was a comet

[E.P. Grondine]

Hi Jens - 

What the h*** do you think a carbonaceous chondrite is, 
anyhow? Try a piece of comet.

The reason Baptistina type asteroids are rare 
is because they're captured dead comets and 
comet fragments.

Further, due to the periodicity of ELEs, we can 
pretty well link them with cometary injection.

Once again, the sooner Weiler and Morrison are
relieved, the sooner we'll be able to step up 
to dealing with this problem. There's also a 
personnel change that needs to be made at NSF.

E.P. Grondine
Man and Impact in the Americas

Jens cited wikipedia
 "On September 5, 2007 a report published in Nature proposed
 an origin for the asteroid that created Chicxulub Crater.
 The authors, William F. Bottke, David Vokrouhlický, and
 David Nesvorný, argued that a collision in the asteroid belt
 160 million years ago resulted in the creation of the
 Baptistina family of asteroids, the largest surviving member
 of which is 298 Baptistina. They proposed that the "Chicxulub
 asteroid" was also a member of this group. The connection
 between Chicxulub and Baptistina is supported by the large
 amount of carbonaceous material present in microscopic
 fragments of the impactor, suggesting the impactor was
 a member of a rare class of asteroids called carbonaceous
 chondrites, like Baptistina.
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