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(meteorobs) Leonids Peak in NJ
Good day all,
Due to exhaustion produced by extremely cold weather it took me a
while to process my Leonid data for the 16/17. Here is a flash analysis.
Summary info will be forwarded to NAMN Coordinator immediatly following
this. Full report will follow ASAP for Nov 14/15 15/16 and 16/17.
OVERVIEW OF LEONIDS
Date Time (UT) Teff LM Met LEO M/H L/H MagL MagO
MagSpor
NOV 14/15 0815-1033 1.62 5.1 20 6 12.3 3.7 +1.67
+3.40 +3.11
NOV 15/16 0909-1039 1.50 5.23 28 15 18.7 10.0 +1.60 none
+3.08
NOV 16/17 0530-1040 4.87 5.35 132 88 27.1 18.1 +0.23 +2.00
+2.97
M/H=meteors per hour, L/H is Leonids/hr MagL=Leonid Magnitude O=Others
(NTA,STA,AMO)
Highlights of the Evening
Outburst near 0900...15 meteors in 15 minutes
At 8:48:13 a spectacular -7(estimated) Leonid fireball occurred. I did not
see the meteor, but estimated it's brightness by observing the trees being
lit up and my own shadow. When I turned the train was still glowing below
Cassiopea. I observed the smoke trail for approximatly 7 minutes and 30
second as the *top* was blown the west.
Other Fireballs (-4) occurred at 7:12:19 (2.5 sec train), 09:58:?? (24
second train), and 10:16:27 (46 second train)
88 Leonids were observed of 132 total meteors in 4.87 Teff hours. LM
started at only 5.5 and deteriorated...at the outburst time it was 5.2.
75% of the Leonids produced wakes or trains, 59% had trains of 1.0 second
or greater.The 3 listed above were the only ones greater than 5 seconds.
Fine structure of rates.
The following was observed.All times listed are the center of the period
specified.
There appeared to be an early peak. I started observing at 0530 UT, with
the radiant just rising, yet the quarter hour centered at 0553 had 8 (32/hr
rate), the half hour centered at 0546 12 (24/hr) and the hour centered at
0604 had 15.
A minimum occurred next with 0 in a quarter hour (0608), 2 in a half hour
(4/hr) at 0615, and 7 for the hour at 0630.
A short quarter hour burst occurred at 0705 with 8 counted (32/hr)
A more substantial peak was noted at 0800-0805 (8 in q hr/32 rate), 13 in
1/2 hour (0756 25/hr rate), and 22 counted in the hour near 0740.
A dead spot occurred with no Leonids for 20 minutes centered at 0820, only
4 in that half hour, while that hour logged 15 from eaither side of the
null.
The peak observed rate occurred around 0900. This included the -7 fireball,
as well as numerous negative magnitude meteors.The 1/4 hour centered at
0857 had 15 (60/hr rate), the half hour at 0906 had 19 (38/hr rate), and
the hour centered at 0910 was the highest hourly count of 29.
Another dead spot occurred at 0948 with only 1 in the 1/4 hour (4/hr), and
6 (12/hr) in the 1/2 hour.
Finally as twilight arose, rate appeared to be climbing yet again. 8 in the
last 1/4 hour (32/hr), and 11 in the half hour (22/hr)
Follow-Ups: