zenith attraction Re: (meteorobs) Re: June Bootids - Call for observations

Marco Langbroek marco.langbroek at wanadoo.nl
Tue Jun 22 16:42:43 EDT 2004


> Richard,
>
> I'll take a stab at this:
>
> For the slowest meteoroids entering the Earths' atmosphere, the Earth's
> gravity actually increases the entry velocity and the changes the path of
> the meteoroid. As seen from the Earth's surface this change causes the
> actual radiant to appear closer to the zenith. If I recall correctly, this
> can amount to up to twenty degrees in some cases.

For those who run MS Excel: you can download a spreadsheet with which you
can calculate zenith attraction values at my website:
http://home.wanadoo.nl/marco.langbroek/metsoft.html

June Bootids are similar in speed to October Draconids.

- Marco

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Marco Langbroek
Dutch Meteor Society (DMS)
Leiden, the Netherlands
52.15896 N, 4.48884 E (WGS 84)

e-mail: meteorites at dmsweb.org
DMS website: http://www.dmsweb.org
priv. website: http://home.wanadoo.nl/marco.langbroek
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