[meteorite-list] re: Meteors From Comet C/1976 D1

From: Marco Langbroek <marco.langbroek_at_meteoritecentral.com>
Date: Thu Apr 22 10:18:31 2004
Message-ID: <000f01c2ddcf$19f57280$9c3a4451_at_HAL>

Bob wrote:

> I discovered what happened on the position. In Ron's first note the
> complete RA numbers were missing. The meteor shower radiant is at
> 0 hours, 13 minutes and visible in the far southern constellation of
> Tucana.

No, the radiant is at 13 degrees, which is 0h 52m in RA. I have Esko's and
Peter's original Icarus paper here, it is given as 013 degrees, which means
13 degrees (three digit column in a table, hence the zero in front).

Not that this makes such a large difference with such a near-polar
declination by the way.... The radiant is in Tucana alright, some 10 degrees
north of the small Magellanic cloud.

Using degrees rather than h-m is not unusual but customary in meteor
astronomy, you'll find this style of writing down the coordinates in any
meteor paper. One reason to keep it that way is that it is easy to correct
the R.A. for daily radiant drift in that way, since this almost equals 1
degree per day. If you want h-m, just divide by 15 to get the hours in
decimal notation.

Peter (Jenniskens) is currently heading for South Africa in order to try to
catch a possible outburst.

- Marco Langbroek (Dutch Meteor Society)

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Drs Marco Langbroek

marco.langbroek_at_wanadoo.nl
meteorites_at_dmsweb.org
http://home.wanadoo.nl/marco.langbroek
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Received on Wed 26 Feb 2003 02:41:11 PM PST