[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: