(meteorobs) Previous predictions for Cassiopeia on 9/21 ??

Chris Peterson clp at alumni.caltech.edu
Fri Sep 21 15:21:25 EDT 2007

Hi Larry-

When you think you've detected a radiant, please report its position in 
terms of RA and declination, since horizon-based coordinates aren't 
easily interpreted by anybody else.

Have a look at http://www.cloudbait.com/misc/0920-0921.gif , which is a 
radiant map derived from 20 meteors I recorded last night. I see two 
areas of slightly increased density, one of which may be a drifted group 
of delta Aurigids, and the other Northern Andromedids (a shower I'm not 
familiar with, but which is labeled in TheSky). The circle marked "LS" 
is the radiant you specified for your location at 3am. As you can see, I 
recorded no radiant activity around there.

Weak apparent radiants are worth making note of, but need more than just 
a few meteors defining them before they become statistically 


Chris L Peterson
Cloudbait Observatory

----- Original Message ----- 
From: <stange34 at sbcglobal.net>
To: <meteorobs at meteorobs.org>
Sent: Friday, September 21, 2007 11:55 AM
Subject: (meteorobs) Previous predictions for Cassiopeia on 9/21 ??

An unusual amount meteor activity(5 events) for this marginal vision 
site was recorded last night with a radiant crossover in the vacinity of 
Cassiopeia after midnight to 4 AM PDT. Altitude was ~65 deg., Azimuth 
was ~340 deg.

Meteor transparencies were overlain on a Alt/Az scale to arrive at a 
radiant location using "The Sky" Astronomy program.

Was this region of sky anticipated?


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