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(meteorobs) Re: Meteoroid Size
Dave Hostetter wrote:
> I've been interested in the discussion on meteoroid sizes, and like
> George Zay, have been surprised by the sizes indicated.
>
> But I'm confused!
>
> Robert Lunsford wrote:
> >
> > As stated in the IMO's visual guide on page 18, the average diameter of
> > a zero magnitude meteor from the Eta Aquarid stream with a velocity of
> > 66 kilometers per second is 2 centimeters with a mass of 1 gram.
> >
> I can't find that reference. Bob, is that IMO visual guide the same
> thing as my IMO Handbook for Visual Meteor Observations, or something
> completely different (please pardon the rookie question!)? Or could you
> have a newer version of the Handbook (mine's from 1989)? By the way,
> just to really muddy the issue, my copy of the Handbook says on page 12
> that meteoroid particles are "mostly no larger than a grain of sand."
>
Dave,
The reference was from the new version of the IMO Visual Handbook
published in 1995.
As for the old reference that WAS the standard perception of size. We
have learned much
in the last few years or else the meteoroids we are now bumping into are
larger than they use to be :)
Bob Lunsford
References: