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Re: (meteorobs) No outburst from Ursids in 2001?
> 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
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