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(meteorobs) NAMN VISUAL SUMMARY REPORT, Dec 13/14 1997, GRALE
NAMN VISUAL SUMMARY REPORT
DATE: Dec 13/14 1997 BEGIN: 0535UT END: 0653UT
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: Tape Recorder
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OBSERVED SHOWERS: Use 3 letter Code; position; name
COM GEM XOR HYD MON
171 +26 111 +33 092 +23 128 +02 102 +08
11:24 +26 07:24 +33 06:08 +23 08:32 +02 06:48 +08
Coma Berens Geminids Chi Orionids Sigma Hydrids Monocerotids
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OBSERVING PERIODS: (0 = none seen; / = shower not watched)
PERIOD(UT) FIELD Teff F LM COM GEM XOR HYD MON Spor
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0535-0653 05h+45 1.00h 1.11 4.66 0 11 1 0 2 6
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MAGNITUDE DISTRIBUTIONS:
SHOWER -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 TOTAL
GEM 1 1 1 1.5 4.5 2 11
MON 1 1 2
XOR 0.5 0.5 1
Spor 2.5 3.5 6
Total: 1 1 1 1.5 8.5 7 20
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SKY OBSCURED:
%10 FROM: 0535UT TO: 0653UT (Ground obstructions)
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DEAD TIME: 00h02m
BREAKS : 00h16m
0606-0622
TOTAL : 00h18m
MEAN MAGNITUDES:
Spor = +2.58 (sample of 6 meteors)
GEM = +1.14 (sample of 11 meteors)
MON = +2.50 (sample of 2 meteors)
XOR = +2.50 (sample of 1 meteor)
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LIMITING MAGNITUDE:
STAR STAR
TIME AREA COUNT LM (mins in effect)
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0535 2 6 5.0 15
0535 17 8 4.6 15
0535 20 4 4.7 15
0606 2 6 5.0 16
0606 17 8 4.6 16
0622 2 6 5.0 16
0622 17 7 4.2 16
0653 17 6 4.2 15
MEAN LIMITING MAGNITUDE: 4.66
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METEOR DATA
# TIME(UT) MAG SPEED COLOR SHOWER TRAIN DCV (*)
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1 0536 0 3 yellow-orange GEM 5.0 sec 10o
2 0536 2 3 GEM 20o
3 0539 1 3 yellow GEM + 20o
4 0539 2 3 GEM 10o
5 0539 2 3 GEM 0o
6 0546 1.5 3 yellow GEM 0.5 sec 30o
7 0548 2 4 Spor 1.5 sec 30o
8 0550 3 3 GEM 10o
9 0552 2.5 2 XOR 10o
10 0552 2 3 GEM 30o
11 0555 3 3.5 GEM 10o
12 0557 3 2 Spor /
13 0603 3 3 Spor 10o
14 0604 2 4 MON 0o
15 0625 3 4.5 Spor 0o
16 063216 -3 3 yellow-blue GEM + 40o *
17 0634 2 3 Spor 10o
18 0636 -1 3 orange GEM 1.0 sec 40o
19 0636 2.5 2.5 Spor 10o
20 0646 3 4 MON 0o
## 0653 ENDED SESSION DUE TO WORSENING HAZE (AND HEALTH)
(*) - Meteors marked by asterisks have additional data under Remarks
[A "+" under the TRAIN column indicates a wake.]
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VELOCITY SCALE (SPEED):
0 = Stationary
1 = Very Slow
2 = Slow
3 = Medium
4 = Fast
5 = Very Fast
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REMARKS: Seeing throughout session Average (5 of 10).
Observations hampered by bright moonlight in field of vision.
Dead time of 5 seconds was deducted per recorded meteor.
Temperature at start of session 34oF, rel humidity 53%.
Temperature at end of session 31oF, rel humidity 50%.
Winds 0-5 kts from the E.
Meteor #15 was a strange color combination: intense yellow AND blue.
GEMs with trains: 45%
Non-GEMs with trains: 11%
Meteors with trains: 30%
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<END OF REPORT>