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(meteorobs) Radiant motions et al...
Wayne et al -
>In fact, the latest edition of the IMO handbook has just such charts!
OK, I have the old edition, 1989. Who do I contact, and how much, for the
new edition??
>I also produce for my snail mail readers of Radiant Rising, charts
>containing all active showers during each lunar period (Full moon to Full),
>based on the aforementioned IMO handbook, as well as radiants from other
>sources including Peter Jenniskens paper for the DMS, and Gary Kronk's
>historical listing.
Please add me to your snail mail list!!
>In actual fact, when you start plotting all the radiants from the N &
>S delta Aquarids, N & S iota-Aquarids, alpha-Capricornids etc, when they
>are concurrently active, you can truly appreciate the difficult task of
>separating members of these showers.
Hmmm. Yes. I see your point. What I did early Saturday afternoon was sit
down with my handy Norton's and plot out all the radiants I was supposed to
be looking for on the Sunday morning. Then, when I set up for observing, I
deliberately faced south, so as to have those radiants right in front of me,
or in the left or right side of my field of view, and I carefully took some
time to go over each of them again. Most of what I saw were sporadics (23
of my 33 meteors). I did not plot, but was careful about the radiant
points. I called 2 alpha CAP's, 2 JPE's, 1 SDA, 1 SAG, and 4 Perseids - and
I will stick to my calls on those.
>it is my personal belief that beginning/novice observers should only report
a generic AQR (for Aquarids), but that thought is just simmering.
Possibly a valid point. If I wasn't looking right at those radiants, I
wouldn't have had a chance of trying to separate them! Likewise, if they'd
been below the horizon.
>Re: Perseids... Based on the IMO information, projecting the radiant
backward in time
to July 5/6 th (when I also observed), the radiant would be RA 001 degree (0
Hr 4 min), Decl + 49. FWIW, in 1.7 hours of looking for these early
Perseids (July 5/6) I saw
none....
I will stick to my guns on my Perseid calls! ;))
>I also observed 0ne JPE (July Pegasid), whose velocity is nearly
identical to the Perseids..dot be sure the ones you saw do not align with that
radiant (which was 339d [22 Hr 34 m], +14) since they are easy to confuse.
Point taken (and observed)!
- Cathy
Great White North