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Re: (meteorobs) Star Party- The perseids!
>Asaf Shtull-Trauring wrote:
>
>I'm planning on doing a Star Party in the time of a
>Meteor Shower, the perseids. The Meteor Shower will
>peak at it's peak at the day, and it will be in a
>desert, so sky conditions will be EXCELLENT.
>
>Now, where can I find peak time, date and everyhting
>of the Perseid Meteor Shower in August 2000?
This was some time ago, but I'll take another stab at this. So we'll
assume that he meant August 1999, since Perseids August 2000 are a full
moon event.
From http://www.skypub.com/sights/meteors/perseids/98preview.html and
several other sources, from recent data give the new peak at 137.7 degrees,
the traditional peak at 140.0 degrees and the newest (1997, 1998) peak at
140.3 degrees, all true J2000:
Solar longitude 139.7000 at 1999/08/12 20:28:21 UT new peak
Solar longitude 140.0000 at 1999/08/13 03:58:16 UT traditional peak
Solar longitude 140.3000 at 1999/08/13 11:28:09 UT newest peak
Note that the overall peak of the Perseids in 1997 was very broad, with ZHR
over 75 from Solar Long 139.55 to 140.4 or 1999/08/12 16:45 to 08/13 14:00
UT, more than 21 hours of great rates.
Computations according to Astronomical Algorithms, Jean Meeus, 1991, and
available at my web page at http://www.halcyon.com/gml/astro/
Something I didn't compute was radiant rise time for Israel.
Gregg Lobdell
gml@halcyon.com
Jennifer Lobdell
jenlobdell@halcyon.com
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