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Re: (meteorobs) Re: Encke and Taurids this year?
>I have noticed that years ending in 0,1,4, and 7 have the better rates and
>more bright ones.[Norman]
>1984 was also a very strong Taurid
year ratewise for me (15 per hour), without the fireballs though. You may
be on to something here. [Paul]
> Asher and Izumi have published on this a few years ago in the MNRAS 297
> (1998), 23-27.
> According to them a cloud of particles in the stream in a 'mean motion
> resonance' in the 7:2 resonance is responsible for these years with above
> average Taurid activity (and indeed, 1981 was one of those years). In
other
> words, it is due to a same kind of phenomena as the 1998 Leonid fireball
> component was. The next scheduled appearance of the 1981 kind for the
> Taurids should be in 2005, according to them.[Marco]
7:2 is subtly but sufficiently distinct from the 10:3 of Encke to
gradually diverge over the decades from the "years ending in 1, 4, and 7"
pattern. 1984...2005 sounds just right for a 7:2 resonance. Similarly, 1960
and '63 might be good suspects in past records for enriched Taurids. What
happened in 2001 and '02?
An unrelated question: would radio methods shed any "light" on this
issue? The Sky Scan Science Awareness Project that I am involved in features
a number of FM forward-scatter detectors which I'm hopeful will be operating
for the next several years. Unfortunately, we cannot determine radiants of
individual meteors, we simply count them During "rich" years, are there
sufficient numbers of Taurids to rise above the background rate? And, would
an abundance of fireballs mean an increase in the numbers of overdense
trails?
regards, Bruce
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