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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>