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Re: (meteorobs) No outburst from Ursids in 2001?
Thanks and Merry Xmas!
Francisco Ocaña
"H.Luethen" escribió:
> > Can anyone to explain what the mean anomaly
> factor means?
>
> In the dust trail model the mean anomaly factor
> gives some idea
> of how much the particles have spread along the
> trail since
> the ejection due to gravitational effects. Asher &
> McNaught
> introduced that value in their 1999 WGN paper. The
> median
> particle density of a 1 rev trail is set to
> fM=1.00.
> With further orbits around the sun the
> value will drop, as the particles stretch along
> the trail.
> For instance for this years Leonids it was about
> 0.13. fM is ONE of the factor influencing the
> particle density you
> are about to experience when crossing a dust
> trail.
> "(fM) of about 0.0002" is of course very low.
>
> Hartwig
>
> The archive and Web site for our list is at http://www.meteorobs.org
> If you are interested in complete links on the 2001 LEONIDS, see:
> http://www.meteorobs.org/storms.html
> To stop getting email from the 'meteorobs' list, use the Web form at:
> http://www.meteorobs.org/subscribe.html
The archive and Web site for our list is at http://www.meteorobs.org
If you are interested in complete links on the 2001 LEONIDS, see:
http://www.meteorobs.org/storms.html
To stop getting email from the 'meteorobs' list, use the Web form at:
http://www.meteorobs.org/subscribe.html
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