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

[meteoreye at comcast.net]

I am still processing my plots from Sept 13-19, but I did see some indication of medium speed meteors from a potential radiant in that area. I planned to mention it in my Sept 13 obs report.
That information will be included when I finish my reports for those days.

I have also tracked both the official IMO DAU radiant, and that suggested by Sirko Molau's
video records presented at IMC 2006.
So far, my observations have suggested that while the IMO position isn't bad, overall Sirko's position has proved to be more aligned with my observations. Same results as far as the SPE's if I recall.

I've been too busy (and sleep deprived) to completely finish the 13,16,17,18,19 of September observations, but hope to get that done this weekend.

While near the peak, the DAU radiants are superimposed, but this early in the DAU activity period the two radiants are over 10 degrees apart. It's one of the benefits of plotting; you can always examine them afterward without bias. In fact, I make it a point, when plotting, to not know exactly where any radiants are. I know the constellation names, so I can pick a field of view, but try not to know the precise locations so I don't subconciously make things align.

Wayne

-------------- Original message -------------- 
From: "Chris Peterson" <clp at alumni.caltech.edu> 

> 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 
> significant. 
> 
> Chris 
> 
> ***************************************** 
> Chris L Peterson 
> Cloudbait Observatory 
> http://www.cloudbait.com 
> 
> 
> ----- Original Message ----- 
> From: 
> To: 
> 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? 
> 
> Larry 
> YCSentinel 
> 
> --- 
> Mailing list meteorobs: meteorobs at meteorobs.org 
> To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org 
> http://lists.meteorobs.org/mailman/listinfo/meteorobs