[Prev][Next][Index][Thread]

(meteorobs) HALWA 2001 NOV 16/17



Here's my full report on the night before the peak. The weather was 
disappointing, but the Leonids were not. It threatened to be clear, but 
this cirrus kept moving in and out, finally forcing me to take a break and 
shift my field of view. The Leonids all occurred after 0848 (0348 local 
time). Hourly rate was 5.7/Hr for last 1.23 hours; I was only expecting 4 
or so considering the lousy skies. However, there were two -4 Fireballs, a 
-3 , and a 0. Average magnitude was sub zero -0.38.

Wayne



NAMN METEOR REPORT

DATE 2001 NOV 16/17
Time (UT) Start 0700 End 1032
OBSERVER: Wayne T Hally (HALWA)
LOCATION: NJAA OBSERVATORY, HIGH BRIDGE, NJ USA (25186)
COORDINATES: 74d 53' 54" West   40d 40' 52" North
ELEVATION: 830 feet (253 Meters)

Recording Method- Tape recorder
Non Leonids plotted, actual plot time derived from tape; appx 45 sec/plot

TIME CALCULATIONS

TOTAL TIME 3:32
Break Time 0:16  0900-0916
Dead  Time 0:10.75
Net   Time 3:05.25
---------------
Teff  Hours 3.09

SKY OBSCURED- none (there were thin cirrus clouds, but they only reduced 
LM, did not obstruct the sky- Note highly variable LM's)

OBSERVED SHOWERS Radiant Diameters for plotting per IMO Handbook
----------------
IMO Showers
Shr  RA  Dec
LEO 153 +22
AMO 114 +02
NTA 064 +23
STA 062 +16

METEORS OBSERVED Small Bins, Early and Late, Total
Time         FOV  Teff    F   LM    LEO AMO NTA STA SPO Total
0700-0800 109 +26 0.924 1.00 +5.38   0   1   2   0   3   6
0800-0830 120 +25 0.467 1.00 +5.35   0   0   0   0   3   3
0830-0900 128 +25 0.467 1.00 +5.15   1   0   0   1   2   4
0916-0930 088 +31 0.233 1.00 +5.15   0   0   0   0   0   0
0930-0945 091 +30 0.250 1.00 +5.05   3   0   0   0   0   3
0945-1000 095 +30 0.250 1.00 +4.88   1   0   0   0   0   1
1000-1016 099 +31 0.242 1.00 +4.93   1   1   0   0   2   4
1016-1032 103 +30 0.253 1.00 +4.90   2   0   0   0   0   2
-----------------------------------------------------------
0700-0900 119 +25 1.857 1.00 +5.31   1   1   2   1   8   13
0916-1032 095 +30 1.228 1.00 +5.00   7   1   0   0   2   10
-----------------------------------------------------------
0700-1032 107 +27 3.09  1.00 +5.23   8   2   2   1  10   23

FOV 0700-0900 156 @ 70 ; 0916-1032 260 @ 60

MAGNITUDE DISTRIBUTIONS- Since there was no trend in magnitudes, combined 
meteors from all periods. If needed, details in meteor data below.

Mag -4   -3   -2   -1    0   +1   +2   +3   +4   +5   N   Avg
LEO  2    1    0    0   1.5   1   1.5   0    1    0   8   -0.38
AMO  0    0    0    0    0    0    0    0    2    0   2   +4
TAU  0    0    0    0    1    1    0    0   0.5  0.5  3   +1.8
SPO  0    0    0    0   1.5   1   3.5   3    1    0   10  +2.10
---------------------------------------------------------------
TOT  2    1    0    0    4    3    5    3   4.5  0.5  23  +1.85

LIMITING MAGNITUDE
LM Summary
Time LM
0700 +5.30
0730 +5.45
0800 +5.40
0830 +5.30
0900 +5.00  LM reduced by thin clouds
0915 +5.20
0945 +5.00  LM reduced by thin clouds
1015 +4.90  LM reduced by thin clouds

LM Data
Time Area Cnt LM  Time Area Cnt LM   Time Area Cnt LM   Time Area Cnt LM
0700  8   8  5.3  0700  4   6+  5.2  0700  17  9+  5.4  0700  22  8+  5.3
0730  8   9  5.4  0730  4   7   5.4  0730  17 10+  5.5  0730  22  9   5.5
0800  8  10  5.5  0800  4   7+  5.5  0800  17 10+  5.5  0800  22  8   5.1
0830  8   9  5.4  0830  4   7   5.3  0830  17  9+  5.4  0830   9  7   5.1
0900  8   M  M.M  0900  4   6   5.2  0900  17  9-  5.2  0900   9  6   4.6
0915  8   8  5.3  0915  4   7   5.3  0915  17  8+  5.0
0945  8   5  4.9  0945  4   6   5.2  0945  17  8   4.9
1015  8   5  4.9  1015  4   6   5.1  1015  17  8   4.7

METEOR DATA
Num Time Mag Spd Train Shwr Map Acc Notes
----------------------------------0700
1  0706  +1   10   -   NTA   4   1
2  0716  +4   15   -   AMO   4   1
3  0719   0   15   -   SPO   4   1
4  0729  +3   12   -   SPO   4   1
5  0750 +0.5  15  Wk   SPO   4   1
6  0753 +4.5  15   -   NTA   4   1
-----------------------------------0800
7  0809  +4   15   -   SPO   4   1
8  0819  +3   20   -   SPO   2   1
9  0823  +2   18   -   SPO   4   1  Possible iota-Aurigid
-----------------------------------0830
10 0838   0   10   -   STA   2   2
11 0849  -3   25  4.0  LEO   NP
12 0853  +3   20   -   SPO   2   1
13 0857  +2   20   -   SPO   NP
----------------------------------BREAK  0900 TO 0916
----------------------------------0930
14 0933 +1.5  25   -   LEO   NP
15 0941 +0.5  25   -   LEO   NP
16 0941  -4   25  5.0  LEO   NP  09:40:20 +/- 15 SECONDS
----------------------------------0945
17 0958   0   25  3.0  LEO   NP
----------------------------------1000
18 1000  +2   28   -   LEO   NP
19 1005 +1.5  20   -   SPO   2   1
20 1014  +4   20   -   AMO   4   1
----------------------------------1016
21 1016  +2   20   -   SPO   4   1
22 1023  +4   25   -   LEO   NP
23 1032  -4   25  2.0  LEO   NP
----------------------------------1032 END	


SESSION NOTES

General Notes
1. All Times UT
2. Speed in degrees per second
3. Train is measured in seconds; Wk=Wake (<0.5sec) (4 of 8 LEO's had 
trains)
4. Plot Accuracy 1=very accurate 2=medium 3=poor
5. In notes Column, 3 or 4 letter codes are for Non-IMO associations.
6. Meteor 9 only possible iota Aurigid.
7. Of note was the unexpected brightness of the Leonids. Although clouds 
were reducing LM, the bright ones would have been hard to miss!!!
8 ending temp 40F (5C)

The archive and Web site for our list is at http://www.meteorobs.org
If you are interested in complete links on the upcoming LEONIDS, see:
http://www.meteorobs.org/storms.html
To stop getting email from the 'meteorobs' list, use the Web form at:
http://www.meteorobs.org/subscribe.html