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Re: (meteorobs) Observation ... & Librids Outburst !!



Hi, Francisco Ocaņa,

I have looked for the data on Apirl 20/21 here since I saw your computation
result.
This is a report from +8 Time Zone on that day, I hope it's helpful.

=============================================
VISUAL OBSERVATION FORM - SUMMARY REPORT
=============================================
DATE: Apr. 20/21, 2001

BEGIN: 15:30  UT

END: 20:00  UT

OBSERVER:  Songqing Gao          IMO code:

LOCATION: Long: 117d 34m 42s E; Lat: 40d 23'47" N; Elevation: 900m.

Place: Xinglong, Heibei, China                   IMO code:

RECORDING METHOD: Tape

----------------------------------------------------------------------------
OBSERVED SHOWERS: 3-letter code; radiant position; radiant diameter
LYR : RA 271deg  DEC 34deg
----------------------------------------------------------------------------

PERIOD(UT)         FIELD            Teff    F        LM     LYR  SPO
15:30-16:30   RA 17h   DEC 30deg   1.0     1.0      5.7     10    4
16:30-17:30   RA 17h   DEC 30deg   1.0     1.0      5.8      5    2
17:30-18:30   RA 19h   DEC 35deg   1.0     1.0      5.8      2    1
18:30-19:30   RA 19h   DEC 35deg   1.0     1.0      5.7      2    2
19:30-20:00   RA 21h   DEC 35deg   0.5     1.0      5.5      4    1
----------------------------------------------------------------------------
TOTALS                                             4.5
23   10
----------------------------------------------------------------------------

MAGNITUDE DISTRIBUTIONS: 5.7

SHOWER   -7  -6  -5  -4  -3  -2  -1  0  +1  +2  +3  +4  +5  +6  TOTAL

LYR       0   0   0   0   0   1   2  2   7   6   5   0   0   0    23
SPO       0   0   0   0   0   2   1  1   1   2   1   2   0   0    10
----------------------------------------------------------------------------
Total     0   0   0   0   0   3   3  3   8   8   6   2   0   0    33
----------------------------------------------------------------------------
SKY OBSCURED: 0%

----- Original Message -----
From: Francisco Ocaņa <paco1987@jazzfree.com>
To: <meteorobs@jovian.com>
Sent: Wednesday, April 25, 2001 6:01 AM
Subject: Re: (meteorobs) Observation ... & Librids Outburst !!


> Hi Pierre,  With your information, ( 1 hour observed, 7 meteors, LM
> 6,35, radiant alt = 22š, F=1.00), the ZHR of Librids/Saggitarids was:
>
> April 20 2001 => 03:40 - 04:43   ZHR = 21,4 +/- 8,1         (Perhaps,
> itīs wrong, please calculate it, I can have done bad the calculation)
>
> Iīve 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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