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(meteorobs) NAMN Meteor Report: Sep 10/11 (GRALE)
METEOR VISUAL OBSERVING FORM
SUMMARY REPORT
DATE: Sep 10/11 1996 BEGIN: 0334UT END: 0715UT
OBSERVER : GRALE (Lewis J. Gramer)
LOCATION : Long: 71o 06' 23" W; Lat: 42o 26' 51" N
City & State: Sheepsfold, Stoneham, MA, USA; Elevation: 165'
RECORDING METHOD: Tape Recorder and Plotting
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OBSERVED SHOWERS: Use 3 letter Codes
DAU 60 +47
SPI 357 -5
Non-IMO: (see Remarks)
"ARI" UNKNOWN (possible radiant in Aries)
"A-T" UNKNOWN (possible radiant on Ari-Tri border)
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OBSERVING PERIODS:
PERIOD(UT) FIELD LM Teff F DAU SPI SPOR
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0334-0550 00:30h+60 5.73 1.72h 1.02 3 0 16
0550-0715 00:30h+60 6.08 1.15h 1.01 5 1 11
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MAGNITUDE DISTRIBUTIONS:
SHOWER -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 TOTAL
DAU 1 1 1 4 1 8
SPI 1 1
SPOR 1 1 1 0.5 4 9 9 1.5 27
Total: 1 1 1 1 1.5 5 14 9 2.5 36
[
SPORADIC (SPOR + NON-IMO) MAGNITUDE DISTRIBUTION (see Remarks):
SHOWER -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 TOTAL
"ARI" 1 1 2
"A-T" 1 2 4.5 0.5 8
SPOR 1 1 0.5 4 6 3.5 1 17
Total: 1 1 1 0.5 4 9 9 1.5 27
]
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SKY OBSCURED:
%10 FROM: 0447UT TO: 0458UT 00h11m in period 1
%5 FROM: 0458UT TO: 0505UT 00h07m in period 1
%5 FROM: 0546UT TO: 0550UT 00h04m in period 1
%5 FROM: 0550UT TO: 0600UT 00h10m in period 2
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MEAN MAGNITUDES
DAU = +2.00 (sample of 8 meteors)
SPI = +3.00 (sample of 1 meteor)
SPOR = +2.74 (sample of 27 meteors)
[
Non-IMO:
"A-T" = +2.94 (sample of 8 meteors)
"ARI" = +3.50 (sample of 2 meteors)
SPOR = +2.56 (sample of 17 meteors)
[
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DEAD TIME:
00h14m (18 plots) in period 1
00h12m (16 plots) in period 2
BREAKS :
0414UT-0428UT 00h14m in period 1
0437UT-0442UT 00h05m in period 1
0632UT-0636UT 00h04m in period 2
TOTAL : 00h49m
00h33m in period 1
00h16m in period 2
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LIMITING MAGNITUDE:
STAR STAR
TIME AREA COUNT LM (mins in effect)
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0334 6 7 5.7 15
7 9 5.2 15
0404 7 10 5.4 25
18 12 5.9 25
0428 7 12 5.5 9
18 12 5.9 9
0450 7 11 5.4 23
18 12 5.9 23
0520 18 13 6.1 30
0550 2 11 5.7 57
18 13 6.1 57
0650 2 15 6.2 24
18 16 6.3 24
0715 2 17 6.3 15
18 16 6.3 15
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MEAN LIMITING MAGNITUDE: 5.88
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METEOR DATA
PLOT
# TIME (UT) SPEED TRAIN ACCU-
H min MAG 1-5 COLOR SHWR SEC MAP# RACY DCV NOTE
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1 0346 3.5 3 Spor 1 1 10 A-T?
2 0349 3 3.5 Spor 6 3 30
3 0404 4 3 Spor 1 2 10
4 0406 3 3 Spor 1 3 40 Ari?
5 0432 -2 3 Spor 30.0 (No Plot) 50 *
6 0444 2 4 Spor + 1 1 20
7 0448 3 3 Spor 3 1 30
8 0455 3 3 Spor 1 1 30 A-T?
9 0459 4.5 3 Spor 1 1 20 A-T?
10 0501 4 3 Spor 1 1 20 A-T?
11 0508 3.5 3 Spor 1 1 20
12 0502 3.5 3 Spor 3 1 10
13 0518 3 3 Spor 1 1 20
14 0520 4 3 Spor 1 1 10 A-T?
15 0524 3.5 3.5 Spor 1 1 20 Tau?
16 0528 1.5 4 Spor 1 1 30
17 0536 3 4 DAU? 1 2 40 *
18 0538 2 4 DAU 1 1 30
19 0543 3 4 DAU? 2 2 20 *
20 0552 3.5 3 Spor 1 1 30 A-T?
21 0606 3 4.5 DAU 1 1 10
22 0608 5 4 DAU? 1 1 0 *
23 0614 3 4 DAU? 2 1 30 *
24 0620 2 4 Spor 1 3 30
25 0623 4 3 Spor 1 1 20 Ari?
26 0625 4 3.5 Spor 1 1 10
27 0627 0 2.5 Yel Spor + 1 2 -
28 0638 3 3.5 Spor 1 1 20
29 0645 4 3 Spor 1 1 10 A-T?
30 0650 -4 4 Org-Yel DAU? 0.5 1 1 10 *
31 0652 3 2 SPI? 1 1 0 *
32 0655 1 4 Yel DAU? 1.0 1 1 20 *
33 0659 5 3 Spor 1 1 0
34 0700 2.5 2 Spor 1 1 20
35 0704 -3 3 Spor 2.0 6 3 60 A-T? (haze)
36 0708 2 3 Spor 3 1 40
## 0715 ENDED SESSION
* - Meteors marked by asterisks have additional data in the Remarks.
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VELOCITY SCALE: PLOT ACCURACY:
0 = Stationary 1 = Accurate Plot
1 = Very Slow 2 = Normal Plot
2 = Slow 3 = Generalized Direction
3 = Medium
4 = Fast
5 = Very Fast
TRAIN: "+" - indicates a wake of less than 0.5 seconds duration.
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REMARKS: Seeing throughout session was medium to medium-good.
Haze and fog were noted interfering with observations up until 0530.
Thin Cirrus and Cirrostratus interfered with observations after 0600.
Dead time of 45 seconds was deducted per plotted meteor.
Meteors annotated as "A-T" were noted as possibly originating from a
new radiant near the border of Aries and Triangulum (non-IMO shower).
Expected speed for this activity was "Medium" (3), but path matches
with "radiant" will have to await cross-observer analysis.
Meteors annotated as "Ari" were noted as possibly originating from a
new radiant in Aries, probably related to the A-T "radiant" above
(non-IMO shower). Expected speed for this activity was "Medium" (3),
but path matches with "radiant" must await cross-observer analysis.
Meteor #5 was originally noted at near the edge of FOV. and could
not plotted in spite of a beautiful, VERY long-lasting train, due
to obscuring clouds in that region. However, meteor travelled from
North to South over 12o, throught omicron Herculis about 7o along.
Meteor #15, with note "Tau?", was a very weak match to a possible
activity noted by other observers in Tau.
Meteors #17, #30, #32 were all noted as likely DAUs (Delta Aur)
due to speed, length and NEAR (but imperfect) radiant alignment.
Meteors #19, #22, #23 were all noted as possible DAUs (Delta Aur)
due to speed, length and weak (very imperfect) radiant alignment.
Meteors #31 was noted as a possible SPIs (Sept Piscid), due to
speed and radiant alignment. Path length however was questionable.
Meteor #35 was seen in Cirrus haze, thin enough to allow plotting,
but which probably shortened measurable train duration.