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(meteorobs) NAMN VISUAL SUMMARY REPORT, Nov 12/13 1997, GRALE
[Reports from two previous plotting sessions during this lunation
will follow later this week. Plots to follow to Mark Davis via
postal mail. By the way, if any newcomers are curious about the
contents or format of these report forms, be sure to drop a note
to the list! Clear skies everybody. -Lew]
NAMN VISUAL SUMMARY REPORT
DATE: Nov 12/13 1997 BEGIN: 0520UT END: 0735UT
OBSERVER : GRALE (Lewis J. Gramer)
LOCATION : Long: 71o 30' 30" W; Lat: 42o 37' 10" N; Elev: 146m
City & State: MIT Haystack Observatory, Westford, MA
RECORDING METHOD: Plotting and Manual
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OBSERVED SHOWERS: Use 3 letter Code; position; name
NTA STA ORI AMO LEO
060 +23 058 +15 110 +18 111 -04 148 +24
04:00+23 03:52+15 07:20+18 07:24-04 09:52+24
N Taurids S Taurids Orionids Alpha Mon Leonids
(Non-IMO: Andromedids 026+37 3, Alpha Pegasids 340+23 ?)
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OBSERVING PERIODS: (0 = none seen; / = shower not watched)
PERIOD(UT) FIELD Teff F LM NTA STA ORI AMO LEO SPOR
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0520-0735 07h+40 1.83h 1.01 5.85 2 1 4 2 2 9
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MAGNITUDE DISTRIBUTIONS:
SHOWER -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 TOTAL
NTA 1 1 2
STA 0.5 0.5 1
ORI 0.5 2.5 1 4
AMO 0.5 1.5 2
LEO 1.5 0.5 2
SPOR 2 1 4 2 9
Total: 1 2 2 6.5 7 1.5 20
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SKY OBSCURED:
PERIOD 1 k = 0.007
%05 FROM: 0623UT TO: 0640UT
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DEAD TIME: 00h20m MEAN MAGNITUDES
BREAKS : 00h05m SPOR = +1.67 (sample of 9 meteors)
(0615-0620) NTA = -0.50 (sample of 2 meteors)
TOTAL : 00h25m STA = +3.50 (sample of 1 meteor)
ORI = +3.13 (sample of 4 meteors)
AMO = +2.75 (sample of 2 meteors)
LEO = +2.25 (sample of 2 meteors)
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LIMITING MAGNITUDE:
STAR STAR
TIME AREA COUNT LM (mins in effect)
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0520 4 8 5.3 15
0520 17 10 5.5 15
0550 4 10 5.7 30
0550 17 13 6.0 30
0620 4 10 5.7 30
0620 17 14 6.1 30
0650 3 12 5.7 37
0650 4 12 6.1 37
0735 3 13 5.8 23
0735 4 13 6.2 23
MEAN LIMITING MAGNITUDE: 5.85
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METEOR DATA
# TIME (UT) MAG SPEED COLOR SHWR TRAIN MAP# ACCU DCV (*)
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1 0524 0 4.5 org Spor + 4 2 40
2 0532 2.5 3 ORI 8 1 30
3 0540 3 4 ORI 4 1 10
4 0553 2 2.5 Spor 1 1 20 *
5 0610 3 3 Spor 2 1 10
6 0611 1.5 3.5 pal grn Spor 3.0 sec 2 1 30
7 0623 3 4 AMO 2 1 10
8 0636 3 4 ORI 2 1 20
9 0640 1.5 3.5 yel Spor + 2 1 20
10 0646 2.5 4 AMO 4 1 10
11 0646 3 0 Spor 4 1 0 *
12 0654 1 2 yel-grn NTA 2.0 sec 4 1 40
13 0657 2.5 4 LEO 8 2 30
14 0707 4 4 ORI 2 1 10
15 0711 2 4.5 LEO 1.5 sec 1 1 20
16 0716 0 3 Spor 2.0 sec 2 1 20 *
17 0716 2 3 Spor + 2 1 30 *
18 0719 3.5 2 STA 2 1 0
19 0728 2 2.5 Spor 1 2 30
20 0729 -2 3 blu-whi NTA 4 2 10 *
## 0735 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 Medium Good (6 of 10).
Dead time of 60 seconds was deducted per recorded meteor.
(High dead time deducted due to cold + recent inactivity.)
Temperature throughout session was 19oF, rel humidity 15%.
Meteors #4, #16, and #17 were all noted as sharing a common inter-
section point and estimated speed, with path lengths to match.
Meteor #11 was observed as a point meteor - no definite endpoints
were noted. Nonetheless, an IMPRESSION of direction was seen!
Meteor #20 was noted as accuracy "2", despite a DCV of only 10o,
because it was observed at the edge of an obstruction.
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<END OF REPORT>