[meteorite-list] addition to : quadrantids, 2003 EH1 & St. Marks meteorite

From: Marco Langbroek <marco.langbroek_at_meteoritecentral.com>
Date: Thu Apr 22 10:18:03 2004
Message-ID: <001001c3c946$1c53bf10$ccc3ea3e_at_HAL>

Hello Dough and others,

To make 'visible' what I mean with the argument that a fall in South Africa
at 23h local time is impossible from the viewpoint of a Qudrantid orbit: I
have posted the view of what part of the earth is 'in target' for particles
coming in from the Quadrantid orbit at that moment at url:

http://home.wanadoo.nl/marco.langbroek/quads.jpg

As you can see, South Africa is nowhere in sight, it is well past the edge
of the hemisphere in target. It will only start to emerge from behind the
Earth's limb some 6 hours later and even then remains very close to the
southern edge of the target hemisphere.

The picture was made with 'Home Planet' by putting the observation point
right above the location where the Quadrantid stream radiant (RA 230, dec
+49.5) would be in the zenith at the time of the St. Mark's fall.

Cheers,

- Marco

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

meteorites_at_dmsweb.org
http://home.wanadoo.nl/marco.langbroek
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Received on Tue 23 Dec 2003 06:11:03 AM PST