[Prev][Next][Index][Thread]

(meteorobs) NAMN VISUAL SUMMARY REPORT, Nov 16/17 1997, GRALE




NAMN VISUAL SUMMARY REPORT

DATE: Nov 16/17 1997   BEGIN: 0505UT  END: 1045UT
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: Tape Recorder
-----------------------------------------------------------------------

OBSERVED SHOWERS: Use 3 letter Code; position; name
 LEO          NTA          STA          AMO
 153 +22      064 +23      062 +16      115 -06
 10:12+22     04:16+23     04:08+16     07:40-06
 Leonids      N Taurids    S Taurids    Alpha Mon

-----------------------------------------------------------------------
-----------------------------------------------------------------------
OBSERVING PERIODS:  (0 = none seen;    / = shower not watched)
PERIOD(UT)    FIELD   Teff   F      LM    LEO NTA STA AMO Spor Total
-----------------------------------------------------------------------
1 0505-0605   03h+45  0.98h  1.00   5.97  6   0   0   1   5    12
2 0605-0658   05h+45  0.88h  1.00   6.30  5   0   2   0   3    10
3 0724-0900   04h+55  1.55h  1.00   6.08  25  2   1   1   6    35
4 0930-1045   08h+55  1.20h  1.00   5.84  22  0   0   1   7    30
-----------------------------------------------------------------------
-----------------------------------------------------------------------
MAGNITUDE DISTRIBUTIONS:

SHOWER -7 -6 -5 -4 -3 -2 -1  0   +1  +2   +3   +4   +5   TOTAL
LEO       .5 1  3  5  5  3   5   6.5 14   9.5  4.5       57
NTA                          .5  .5       .5   .5        2
STA                              .5  1.5       1         3
AMO                              1        1    1         3
SPOR            1     2      2.5 .5  4    6.5  4.5       21
Total:    .5 1  4  5  7  3   8   9   19.5 17.5 11.5      86

-----------------------------------------------------------------------
-----------------------------------------------------------------------
SKY OBSCURED:
%00   FROM: 0505UT  TO: 1045UT
PERIOD 1   k = 0.000
PERIOD 2   k = 0.000
PERIOD 3   k = 0.000
PERIOD 4   k = 0.000
-----------------------------------------------------------------------
-----------------------------------------------------------------------
           Period 1    Period 2    Period 3    Period 4
DEAD TIME: 00h01m      00h01m      00h03m      00h03m
BREAKS   :             00h26m      00h30m
                       0658-0724   0900-0930
TOTAL    : 00h01m      00h27m      00h33m      00h03m

FOR ALL PERIODS:
DEAD TIME: 00h08m
BREAKS   : 00h56m
TOTAL    : 00h64m

MEAN MAGNITUDES:
Spor  = +1.81  (sample of 21 meteors)
LEO   = +0.58  (sample of 57 meteors - 2 meteors had no noted mag)
NTA   = +2.00  (sample of  2 meteors)
STA   = +2.50  (sample of  3 meteors)
AMO   = +2.67  (sample of  3 meteors)
-----------------------------------------------------------------------
-----------------------------------------------------------------------
LIMITING MAGNITUDE:
       STAR  STAR
TIME   AREA  COUNT LM     (mins in effect)
-----------------------------------------------------------------------
0505     18  12    5.9    50
0625      2  17    6.3    53
0730     17  13    6.0    21
0800      2  15    6.2    35
0800     17  13    6.0    35
0830     17  15    6.1    40
0900      3  14    6.0    15
0930      3  13    5.8    15
0930     17  14    6.1    15
1000      3  15    6.1    30
1030      3  13    5.8    20
1045      3   7    4.8    10

MEAN LIMITING MAGNITUDE: 6.02
-----------------------------------------------------------------------
-----------------------------------------------------------------------
METEOR DATA
#   TIME(UT)  MAG    SPEED  COLOR         SHOWER  TRAIN (seconds) (*)
-----------------------------------------------------------------------
1   0508      2.5    4                    LEO     2.5 sec
2   0515      0.5    3      yellow        Spor    +
3   0516      2      4                    LEO
4   0523      4      4                    LEO
5   0531      0      3      orange        Spor    2.0 sec
6   0532      3      4                    LEO                      *
7   0542      2      4                    LEO     3.0 sec
8   0548      4      4                    AMO
9   054853   -2      4      orange-green  LEO     1.5 sec
10  0551     -2      2.5    yellow        Spor
11  0555      4      3                    Spor
12  0556      3.5    2.5                  Spor
13  0605      4      2                    STA
14  0616      2      4                    LEO
15  063155   -3      4      pale green    LEO     4.0 sec          *
16  063345   -2      3                    Spor
17  063658   -3      4      pale green    LEO     2.0 sec          *
18  0640      2      0                    STA
19  0641      1      4      yellow-green  LEO     4.0 sec pal grn
20  0648      2      5      yellow-green  LEO     1.0 sec pal grn
21  065124   -4      2      bright orange Spor    0.5 sec
22  0654      3      3.5                  Spor
23  0727      3.5    2                    NTA
24  0727      2      2.5                  Spor
25  0727      1.5    4      pale green    LEO     0.5 sec
26  073009   -3      4      bright yellow LEO     +
27  0732      1      4                    LEO     1.5 sec
28  0733      2.5    4                    LEO
29  073526   -4.5    4      bright yellow LEO     1.5 sec white    *
30  0745      0.5    2      yellow        NTA     +
31  0745      2      4      pale yellow   LEO     3.0 sec
32  0749      3      4                    LEO
33  0754      0      4      pale orange   LEO     0.5 sec
34  0803     -1      4      yellow-orange LEO                      *
35  0806      1.5    2                    STA     0.5 sec
36  0806      2      4                    LEO     2.0 sec
37  0806      2      4      pale green    LEO     4.0 sec
38  0809      4      4                    LEO
39  080955   -2.5    4      orange        LEO     8.0 sec          *
40  081044   -4      4      yellow-orange LEO     4.5 sec orange   *
41  0815      2      4                    LEO
42  0819      2.5    3                    Spor
43  0821      0.5    4      orange-green  LEO     3.5 sec
44  0821      1      4      pale yellow   LEO     2.0 sec
45  0828      3      4                    LEO     +
46  0830      2.5    2.5                  Spor
47  0836      3.5    4                    LEO
48  084342   -3.5    4      orange-white  LEO     0.5 sec          *
49  0845      1.5    4                    LEO     3.0 sec
50  0846      2      4                    Spor    1.5 sec
51  0849      2      4                    LEO
52  0849      3      4                    LEO
53  085049    0      0      blue-white    Spor                     *
54  0850      3.5    4                    LEO
55  0855      2      4.5                  Spor
56  0855      /      4                    LEO
57  0856      1      4                    AMO                      *
58  0859     -2      4      orange        LEO     0.5 sec
59  0930      2.5    4                    LEO
60  0934      4      3                    Spor
61  0937      0      4                    LEO                      *
62  0938     -0.5    4      bright orange LEO     11.0 sec         *
63  0939      3      3                    Spor
64  0939      1      4      light green   LEO     6.0 sec
65  0941      2.5    4                    LEO
66  094319   -5.5    4      yellow-orange LEO     6.0 sec          *
67  0948     -2      4                    LEO     2.5 sec          *
68  0948      3      3                    Spor
69  0951      3      4                    AMO
70  0952      3      3                    Spor
71  0953      3.5    4                    LEO
72  095408   -4      4      blue-white    LEO     3.0 sec
73  095414   -1.5    4                    LEO     3.0 sec
74  0957      /      4                    LEO     1.5 sec
75  0958      2      4                    LEO
76  1002      4      3                    Spor
77  1009     -1      4      light blue    LEO     0.5 sec
78  1011      3      4                    Spor
79  1011      3      4                    LEO
80  1014      3.5    4                    LEO
81  1015      0      4      white-yellow  LEO     8.0 sec
82  1019      1      4      green-blue    LEO     7.0 sec
83  1020     -2      4      yellow-orange LEO     2.0 sec
84  102255   -3      4      yellow-orange LEO     30.0 sec
85  1027      4      3                    Spor
86  1029      0      4                    LEO
87  1040      3.5    4                    LEO
88  1044      2      4                    LEO
##  1045     ENDED SESSION IN BRIGHT TWILIGHT

(*) - Meteors marked by asterisks have additional data under Remarks
[A "+" under the TRAIN column indicates a wake.]
-----------------------------------------------------------------------
-----------------------------------------------------------------------
VELOCITY SCALE (SPEED):
0 = Stationary
1 = Very Slow
2 = Slow
3 = Medium
4 = Fast
5 = Very Fast
-----------------------------------------------------------------------
-----------------------------------------------------------------------
REMARKS: Seeing throughout session Medium Good (6 of 10).

Dead time of 5 seconds was deducted per recorded meteor.

LEOs with trains:     59%
Non-LEOs with trains: 29%
Meteors with trains:  47%

Temperature at start of session 21oF, rel humidity 34%.
Temperature at end of session 16oF, rel humidity 20%.

Meteor #6 was 30 degrees long.
Meteor #15 started 10o from Polaris toward Capella, ended approx 4o
  toward Alpha Cas from Omicron Cep.
Meteor #17 started 10o due W of alpha Cep, went 20o toward Tau Cyg.
Meteor #29 went from very near Eta Per to very near Ups Psc.
Meteor #34 had an elevation of 8o.
Meteor #39 began at mag 1, flashed to -2.5, and ended at -1, with an
  apparent burst in the center, and train fragmentation.
Meteor #40 began at mag 0, flashed to -2, back to -1, up to -4, before
  ending at mag -3. Trail began in Cam and ended in eastern Cas.
Meteor #48 began at mag 0, paled to 1, before exploding to -3.5. Trail
  uncertain, but began in W UMa, and ended near Alpha UMi.
Meteor #53 was a point meteor, observed at RA 15:30, Dec +80.
Meteor #57 was noted as an AMO based on path aligment and match in
  speed, despite being 20o long and beginning only 30o from radiant.
Meteor #61 had an elevation of 10o.
Meteor #62 showed NO appreciable train movement during its 11 secs!
Meteor #66 varied primarily between mag -2 and -3, with single flash to
  -5. Trail uncertain, but may have traveled length-wise through Lynx.
Meteor #67 had an elevation of 10o, azimuth approximately 100o (E).

Distance to Central Vision and Constellation Seen were not recorded
in (false) anticipation of greatly enhanced rates this night.

--------------------------------------------------
Leonid Interval Analysis:
Time (UT)   LEOs  LEO magnitudes
0505-0520   2     2, 2.5
0520-0535   2     3, 4
0535-0550   2     -2, 2
0550-0605   0
0605-0620   1     2
0620-0635   1     -3
0635-0650   3     -3, 1, 2

0725-0740   5     -4.5, -3, 1, 1.5, 2.5
0740-0755   3     0, 2, 3
0755-0810   5     -2.5, -1, 2, 2, 4
0810-0825   4     -4, 0.5, 1, 2
0825-0840   2     3, 3.5
0840-0855   6     -3.5, 1.5, 2, 3, 3.5, unknown

0930-0945   6     -5.5, -0.5, 0, 1, 2.5, 2.5
0945-1000   6     -4, -2, -1.5, 2, 3.5, unknown
1000-1015   4     -1, 0, 3, 3.5
1015-1030   4     -3, -2, 0, 1
1030-1045   2     2, 3.5
--------------------------------------------------

Additional fireballs observed in heavy twilight after session ended:
 Time(UT)  Mag Color         Shwr Train   Trail Position(s)
 104820    -4  electric-blue LEO          Azim 90o (due E), elev 15o
 104833    -3  white         LEO          Azim 150o (SE), elev 30o
 105458    -3  electric-blue LEO  1.0 sec Start 12:25+25, end 13:35+20
 105610    -3                LEO

 (FIDAC reports for all fireballs will follow Real Soon Now.)
-----------------------------------------------------------------------
<END OF REPORT>



Follow-Ups: