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Re: (meteorobs) Observation ... & Librids Outburst !!
Hi Pierre, With your information, ( 1 hour observed, 7 meteors, LM
6,35, radiant alt = 22º, F=1.00), the ZHR of Librids/Saggitarids was:
April 20 2001 => 03:40 - 04:43 ZHR = 21,4 +/- 8,1 (Perhaps,
it´s wrong, please calculate it, I can have done bad the calculation)
I´ve looked at this page http://homepage2.nifty.com/~baron/radio.htm
and could be some activity.
Anyone more has observed this possible outburst?
Pierre Martin wrote:
> The following night (Thursday April 19/20), conditions were much
> better with excellent transparency at the Casselman site. My limiting
> magnitude reached 6.4. I settled for an hour and a half of meteor
> observing around midnight.
>
> What stole the show during the first hour was not the Lyrids, but an
> unexpected burst or "hiccup" of Librids (aka IMO Sagittarids or
> anthelions)! I'm used to seeing perhaps one or two members per hour
> from this source, especially with the low radiant. You can imagine I
> was quite surprised to find out that my first hour had seven! I got
> some of them plotted. The following half hour observing was much
> quieter with nothing but one sporadic.
>
> It's too bad I had to cut my session short because of work early the
> next morning. I was quite curious to find out what would have
> happened later at night.
>
> The nicest meteor was a yellow-orange colored magn 0 Lyrid that
> flashed in Hercules. Also, one of the Librids travelled 20 degrees on
> a fairly slow path.
>
> Pierre Martin
> Ottawa, Ontario
>
> DATE: April 19/20 2001
> BEGIN: 3:40 UT (23:40 EDT) END: 5:10 UT (1:10 EDT)
> OBSERVER: Pierre Martin (MARPI)
> LOCATION: Long: -75.063 West; Lat: 45.269 North Elevation:100m
> City & Province: Casselman, Ontario, CANADA
> RECORDING METHOD: talking clock/tape recorder
> -----------------------------------------------------------------------
>
> OBSERVED SHOWERS: 3-letter code; radiant position
> LYR (Lyrids) 269 +34
> LIB (Librids, aka IMO Sagittarids) 227 -18
> MVI (Mu Virginids) 15h00 -05
> ABO (Alpha Bootids) 14h20 +21
> -----------------------------------------------------------------------
>
> OBSERVING PERIODS: 0 = none seen; / = shower not observed
>
> PERIOD(UT) FIELD Teff F LM SPO LIB LYR MVI
> 3:40-4:43 13h49 +15 1.00 1.00 6.35 1 7 2 0
> 4:43-5:10 15h07 +24 0.45 " 6.40 1 0 0 0
> -----------------------------------------------------------
> TOTALS: 1.45 2 7 2 0 = 11
> -----------------------------------------------------------
>
> MAGNITUDE DISTRIBUTIONS:
>
> SHOWER 0 +1 +2 +3 +4 +5 AVERAGE
>
> SPO 0 0 0 0 1 1 +4.5
> LIB 0 0 4 1 0 2 +3.0
> LYR 1 0 0 0 1 0 +2.0
> -----------------------------
> TOTALS: 1 0 4 1 2 3
> -----------------------------
>
> SKY OBSCURED:
> None
> ------------------------
>
> Dead time: 3 min (2.5 min for plots)
> Breaks: 3:43 (0.5 min)
> ---------------------------------------------------------------------
>
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