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Re: (meteorobs) Re: zenithal attraction
bob>>The amount of shift depends on the velocity of the
meteoroid. Slower meteoroids will be deflected to a greater degree and
will have a greater zenithal attraction. Showers such as the Perseids
and the Leonids suffer little zenithal attraction. On the other hand,
evening showers with low altitudes can see their radiant shift upwards
as much as 15 degrees.<<
Out of curiosity, which evening showers have a radiant shift as much as 15
degrees? The biggest shift I can find amongst IMO's working list of showers
with the radiant low on the horizon is the Draconids at 10.1 degrees, alpha
Capricornids at 7.8 deg, S. Taurids at 5.3 deg, and N. Taurids at 4.5 deg.
The Perseids will suffer a zenithal shift of 1.1 degrees with radiant low on
the horizon and 0.3 deg relatively high up.
geozay
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