Hello Bert

Although in general case meteor showers are linked, in their origins, to
comets, there is one case that calculations on the meteoroid debris seem
to point its origin with asteroid 2003 EH1. Im talking about the
Quadrantids.
One can guess that comets, by loosing their ice/dust cap, can become
asteroids, as seems to be the case, but I think that's only appliable to
short period comets, and it's caused by successive perielic passages. Long
period comets tend to have longer orbits, extending to the outer solar
system and even behond, periodically being exposed to high temperatures,
that renew that ice cap.

Clear skies

Paulo Heleno
Portugal

On Sat, 1 Dec 2007, G=EMC^2 Glazier wrote:

Tempel 1 a comet,and Eros the asteroid I'm looking at as I type this
post. Both pictures close up,and taken by man made probes. Both were
crashed into by these probes. This was done so we could study its
surface at as close a range as possible. Could one formulate a theory
that as comets lose their water they in time get to be asteroids? Could
one argue if you want to find real comets at this spacetime you have to
go 2.5 LY out to the Oort cloud? They keep their water structure
because the Sun's inferred rays (photons) are much to weak at that great
distance. Bert