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(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)
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