(meteorobs) Meteor report November 18-19 (VANMC)
Michel Vandeputte
michelvandeputte at hotmail.com
Tue Nov 21 17:17:28 EST 2006
VISUAL OBSERVING FORM - SUMMARY REPORT
Night: November 18 - November 19 Year 2006
Observer: Michel Vandeputte IMO code: VANMC
Place: Orgiva (36.90 N - 3.42 W - alt ~ 500m)
Period: 23.30 - 05.30 UT
Method: counting - tape recorder.
Field: north eastern directions.
Active showers:
Leonids (alfa: 154° / delta +22°)
Northern Taurids (alfa 64° / delta 23°)
Southern Taurids (alfa 63° / delta 16°)
Interval analyse
period (UT) Teff F Lm LEO NTA STA TAU SPOR
30' intervals (23.30-02.00UT)
23.30-00.00 0.50 1.00 6.80 0 1 1 0 8
00.00-00.30 0.50 1.00 6.80 2 1 1 1 10
00.30-01.00 0.50 1.00 6.80 4 0 0 2 7
01.00-01.30 0.50 1.00 6.80 3 0 2 0 11
01.30-02.00 0.50 1.00 6.80 6 0 0 1 6
15' intervals (02.00-03.30UT)
02.00-02.15 0.25 1.00 6.80 2 0 0 0 5
02.15-02.30 0.25 1.00 6.80 5 0 0 1 1
02.30-02.45 0.25 1.00 6.80 3 0 0 1 2
02.45-03.00 0.25 1.00 6.80 6 0 0 0 4
03.00-03.15 0.25 1.00 6.80 6 0 0 0 4
03.15-03.30 0.25 1.00 6.80 9 0 0 0 1
5' intervals (03.30-05.30UT)
03.30-03.35 0.083 1.00 6.80 3 0 0 0 3
03.35-03.40 0.083 1.00 6.80 4 0 0 0 1
03.40-03.45 0.083 1.00 6.80 8 0 0 1 1
03.45-03.50 0.083 1.00 6.80 5 0 0 0 1
03.50-03.55 0.083 1.00 6.80 3 0 0 0 0
03.55-04.00 0.083 1.00 6.80 3 0 0 1 2
04.00-04.05 0.083 1.00 6.80 3 0 0 0 1
04.05-04.10 0.083 1.00 6.80 5 0 0 0 1
04.10-04.15 0.083 1.00 6.80 10 0 0 0 1
04.15-04.20 0.083 1.00 6.80 7 0 0 0 0
04.20-04.25 0.083 1.00 6.80 6 0 0 0 2
04.25-04.30 0.083 1.00 6.80 10 0 0 0 1
04.30-04.35 0.083 1.00 6.80 9 0 0 1 2
04.35-04.40 0.083 1.00 6.80 11 0 0 0 1
04.40-04.45 0.083 1.00 6.80 11 0 0 0 2
04.45-04.50 0.083 1.00 6.80 11 0 0 0 3
04.50-04.55 0.083 1.00 6.80 6 0 0 0 2
04.55-05.00 0.083 1.00 6.80 8 0 0 0 1
05.00-05.05 0.083 1.00 6.80 8 0 0 0 0
05.05-05.10 0.083 1.00 6.80 7 0 0 0 2
05.10-05.15 0.083 1.00 6.80 4 0 0 0 2
05.15-05.20 0.083 1.00 6.70 6 0 0 0 2
05.20-05.25 0.083 1.00 6.70 4 0 0 0 1
05.25-05.30 0.083 1.00 6.70 3 0 0 0 3
23.30-05.30 6.00 201 2 4 8 94 = 309 meteors.
For information:
Hourly Leonid counts
23.30-00.30 2
00.30-01.30 7
01.30-02.30 13
02.30-03.30 24
03.30-04.30 67
04.30-05.30 88
1/4 hour Leonid countings
02.00-02.15 2
02.15-02.30 5
02.30-02.45 3
02.45-03.00 6
03.00-03.15 6
03.15-03.30 9
03.30-03.45 15
03.45-04.00 11
04.00-04.15 18
04.15-04.30 23
04.30-04.45 31
04.45-05.00 25
05.00-05.15 19
05.15-05.30 13
Magnitude distributions Leonids
00.00-00.30 +4(2) N 2 Mean 4.00
00.30-01.00 +2(1)+4(2)+5(1) N 4 Mean 3.75
01.00-01.30 +2(1)+4(1)+5(1) N 3 Mean 3.67
01.30-02.00 +1(1)+2(1)+4(3)+5(1) N 6 Mean 3.33
02.00-02.30 +4(4)+5(3) N 7 Mean 4.43
02.30-03.00 +0(1)+2(2)+3(2)+4(1)+5(3) N 9 Mean 3.22
03.00-03.30 -2(1)+2(1)+3(4)+4(7)+5(2) N 15 Mean 3.33
03.30-04.00 -2(1)-1(1)+1(1)+2(2)+3(5)+4(12)+5(4) N26 Mean 3.27
04.00-04.30 -2(1)+0(1)+1(2)+2(2)+3(8)+4(18)+5(9) N 41 Mean 3.54
04.30-05.00 +0(3)+1(2)+2(5)+3(8)+4(31)+5(7) N 56 Mean 3.48
05.00-05.30 -1(1)+1(1)+2(4)+3(11)+4(12)+5(3)
Total Leonid magnitude distribution
LEO -2(3)-1(2)+0(5)+1(7)+2(19)+3(38)+4(93)+5(34) N 201 Mean 3.45 N~: 54
Other showers:
NTA +3(1)+4(1) N 2 Mean 3.50
STA +1(1)+2(1)+3(2) N 4 Mean 2.25
TAU +2(5)+3(2)+4(1) N 8 Mean 2.50
SPOR +0(1)+1(1)+2(8)+3(21)+4(46)+5(17) N 94 Mean 3.71 N~: 5
Remarks:
Second clear night in a row from Orgiva, Spain. There was a little treat for this night in form of the formation of high cirrus above the Iberian island. In fact; during the day of November 18th there were lots of high clouds but they totally disappeared during the first part of the night. The conditions were almost as great as November 17-18. Koen Miskotte, Carl Johanninck and I were doing visual observations. Peter Bus and Jaap van 't Leven were doing some photographic work, even Peter observed some fainter Leonids through his binocular. Peter Jenniskens was busy with video and spectroscopic observations, simultaneously with a second station near Baza. This station was formed by Casper Ter Kuile and Robert Haas from the Dutch Meteor Society. Visual observations started at 23.30UT, video observations at 00.30UT. Between 23.30-01.30UT, Leonid activity remains normal. We observed many weak Leonids in order of magnitude +4 and +5. After 1.30UT we've got the first indications of a slowly increasing Leonid activity. Leonid rates became higher as the hourly activity during 17-18/11. After 4 UT Leonid activity picked up dramatically! The Earth was encountering the 2 REV dust trail! I hold minute countings between 4 and 5.30UT. There were minutes without any Leonid, but also bursts of 4-5 Leonids / minute. I even saw a flurry of meteors in Ursa Major, a bit the same as the famous 1997 burst, but not so impressive. It was a bunch of at least 3-4 Leonids of magnitude +4. Highest Leonid counts were observed between the period 04.35-04.50 UT. Every minute we saw at least two Leonids on average, even 3-4 Leonids wasn't an exception. This really was impressive! There were also some bright ones up to magnitude -2. But mostly; the average Leonids were weak in order of magnitude +4. A dark sky was necessarily for observing this peak. After this peak, activity changed dramatically again..but in negative sense. Just in time: twilight was approaching and from the west there were clouds moving in.we were very lucky!! The session was ended by a bright transit of the ISS and an Irridium flare creating an impressive halo of light on the cirrus clouds.
Conclusion; we saw a short but impressive Leonid outburst! I find it amazing how earth encounters such a dust trail and how quickly everything is over.this is really a big wonder of nature!!
Long trains,
Michel.
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