(meteorobs) Possible outburst of beta-Perseids

[Robert Lunsford]

Quanzhi and All,

Throughout the years many sub-radiants of the Perseids have often been 
reported. One of the most common of these sub-radiants is the Beta Perseids, 
which has a radiant in southern Perseus near the famous variable star Algol 
(Beta Persei). Therefore the main difference between these meteors and the 
normal Perseids is that they seem to line up with Algol, rather than further 
north near the Double Cluster.

I hope this helps!

Bob Lunsford


----- Original Message ----- 
From: "tom6740" <tom6740 at yahoo.com.cn>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: Monday, July 31, 2006 7:25 AM
Subject: Re: (meteorobs) Possible outburst of beta-Perseids


Dear all,
  Would anybody tell me the differences between Perseids and beta-
Perseids? I look for beta-Perseids in Kronk's site but cannot find
it.
Regards,
Quanzhi

--- In meteorobs at yahoogroups.com, pmartsching at ... wrote:
>
> On 9/10 August 1988 I saw an unusual number of Perseids during one
hour.
> CDST 9/10 Aug 1988 2:00 - 3:00am = UT 10 Aug 1988 7:00 - 8:00
> During this hour I saw 34 Perseids.  At that time I seldom made
magnitude
> estimates of meteors.  My note says: "Many were fairly faint and
within 10
> degrees of the main radiant.  Most had trains."
>
> My meteor counts that night:
>
> UT           PER  UPE  KCG   Spor  L.M.
> 03:00-04:00   7   1    1     11    6.1
> 04:00-05:00   2   3    3      5    6.25
> 05:00-06:00  17   5    0      5    6.3
> 06:00-07:00  16   2    0      9    6.3
> 07:00-08:00  34   2    0     20*   6.25
> 08:00-08:30  11   2    0      5    6.15  0.5 hour
>
> *My note about the 20 Sporadics 07:00-08:00: "Most were 4th & 5th
magn. medium
> speed, no trains & in Cassiopeia.  path length generally 1 - 4
degrees."
>
> The UPE's (Upsilon Pegasids) were still active then.  They seem to
have vanished
> completely in the past few years.
>
> I was facing Andromeda and the Double Cluster.  Observing at my
usual place: 93
> deg 34 min W; 42 deg 05 min N; 4 miles NE of Ames, Story County,
Iowa.
>
> Paul Martsching
>
>
> > Possible outburst of beta-Perseids
> >
> > Date: August 08, around 02:50 UT.
> >
> > In 1935, a large number of faint meteors were seen
> > visually by S. Holm in Denmark. The meteors had
> > short tracks and where mostly of +5 and +6 magnitude,
> > with only 6-8 meteors brighter than +4 in each 5-minute
> > count. Observing conditions must have been excellent
> > and the magnitude distribution index steep. Raw counts
> > by Holm peak at an amazing 548 meteors in a 5-minute
> > interval centered at 23h15m MET. An observer 35 km
> > from Silkeborg (at Brabrand, near Aaarhus) noted a
> > large intensity of weak meteors at 23h MET, but not
> > at all as many as reported by Holm.
> >
> > The dust trail responsible for this event, if it is real,
> > would be very near Earth's path again on August 8,
> > 2006. Meteors would radiate from R.A. = 52? Decl. = +40?
> > Peak time would be around 02:50 UT. This event
> > could be visible from western Europe and the eastern USA.
> >
> > If you are able to observe in the night of August 7/8,
> > please look for faint meteors (binoculars?). The Moon
> > should be out of the way in the final hour of the night.
> >
> > I would appreciate any reports on the level of activity,
> > in 5-minute intervals, even if no beta-Perseids are seen.
> >
> > Peter Jenniskens
> >
> > The SETI Institute
> >
> > pjenniskens at ...
> > ---
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