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(meteorobs) NAMN VISUAL SUMMARY REPORT, Nov 24/25 1997, GRALE (Lew Gramer)
NAMN VISUAL SUMMARY REPORT
DATE: Nov 24/25 1997 BEGIN: 0540UT END: 0809UT
OBSERVER : GRALE (Lewis J. Gramer)
LOCATION : Long: 71o 06' 24" W; Lat: 42o 25' 06" N; Elev: 5m
City & State: Medford, MA, USA
RECORDING METHOD: Plotting and Manual
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OBSERVED SHOWERS: Use 3 letter Code; position; name
NTA STA XOR AMO MON
071 +24 068 +17 074 +23 120 -07 086 +08
04:44 +24 04:32 +17 04:56 +23 08:00 -07 05:44 +08
N Taurids S Taurids Chi Orionids Alpha Mon Monocerotids
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OBSERVING PERIODS: (0 = none seen; / = shower not watched)
PERIOD(UT) FIELD Teff F LM NTA STA XOR AMO MON Spor Total
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0540-0656 04h+35 1.00h 1.11 5.88 0 1 0 0 1 7 9
0656-0809 05h+35 1.00h 1.11 6.01 0 1 2 0 0 10 13
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MAGNITUDE DISTRIBUTIONS:
SHOWER -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 TOTAL
NTA 0
STA 1 1 2
XOR 0.5 1 0.5 2
AMO 0
MON 0.5 0.5 1
Spor 1 1 4 9.5 1.5 17
Total: 1 1 2 0.5 5 10.5 2 22
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SKY OBSCURED:
%10 FROM: 0715UT TO: 0825UT (Sky obstructed by buildings)
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Period 1 Period 2
DEAD TIME: 00h09m 00h13m
BREAKS : 00h07m
0557-0604
TOTAL : 00h16m 00h13m
FOR ALL PERIODS:
DEAD TIME: 00h22m
BREAKS : 00h07m
TOTAL : 00h29m
MEAN MAGNITUDES:
Spor = +2.32 (sample of 17 meteors)
STA = -0.50 (sample of 2 meteors)
MON = +3.50 (sample of 1 meteor)
XOR = +2.00 (sample of 2 meteors)
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LIMITING MAGNITUDE:
STAR STAR
TIME AREA COUNT LM (mins in effect)
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0540 2 9 5.4 17
0540 8 10 5.9 17
0620 2 12 5.8 34
0620 8 13 6.1 34
0656 2 12 5.8 33
0656 8 13 6.1 33
0726 17 14 6.1 30
0809 4 11 5.9 28
0809 17 14 6.1 28
MEAN LIMITING MAGNITUDE: 5.94
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METEOR DATA
# TIME (UT) MAG SPEED COLOR SHWR TRAIN MAP# ACCU DCV (*)
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1 0547 3.5 3 Spor 1 1 10
2 0605 2.5 1.5 Spor 1 1 20
3 0612 2 2.5 Spor 7 1 10
4 0624 2.5 4 whi Spor 1.0 sec 1 1 30
5 0628 2 3.5 Spor 1 1 30
6 062810 -1 2.5 whi STA 1 1 20
7 063315 -3 3 yel Spor 4.0 sec 1 1 20
8 0644 3 3 Spor 1 1 10 *
9 0653 3.5 3.5 MON 1 1 20 **
10 0658 3 3 Spor 1 2 20 *
11 0707 3 3 Spor 1 1 10 *
12 0711 3 3.5 Spor 4 1 10
13 0717 2.5 2 XOR 4 1 0
14 0718 0 3 whi Spor 4 2 40 *
15 0731 3 4 Spor 2 1 20
16 0738 2.5 3 Spor 4 1 20
17 0746 3 2.5 Spor 4 1 10
18 0752 0 2 brt grn STA? 1.0 sec 1 1 30 *
19 0759 3 2 Spor 4 1 20
20 075953 1.5 0 XOR +? 4 1 0 *
21 0803 4 4 Spor 1 1 /
22 0807 2.5 5 Spor 4 1 0 *
## 0809 ENDED SESSION
(*) - Meteors marked by asterisks have additional data under Remarks
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VELOCITY SCALE (SPEED): PLOTTING ACCURACY (ACCU):
0 = Stationary 1 = Begin and end points well seen
1 = Very Slow 2 = Less certain of meteor path
2 = Slow 3 = Very uncertain plot: general direction
3 = Medium
4 = Fast
5 = Very Fast
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REMARKS: Seeing throughout session Extremely Good (2 of 10).
Dead time of 60 seconds was deducted per recorded meteor.
(Measured average dead-time this session 47 seconds.)
Temperature throughout session 26oF, wind variable 5-17 kts.
Meteors #8, #9, #10, and #11 were all noted as sharing a common in-
tersection point and estimated speed, with path lengths to match.
Meteor #9 was actually also noted as a possible (albeit short) MON.
Meteor #14 was noted as slightly too fast for either XOR or NTA.
Meteor #18 was noted as a possible STA, though its path is too long.
Meteor #20 was seen as a definite point meteor - third this month!
Meteor #22 was one of the fastest meteors I've ever seen - definitely
seen (with Distance to Center of Vision only 0 degrees), but still
only an impression of a meteor.
Plotting charts will be postal-mailed to Mark Davis of NAMN.
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<END OF REPORT>