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(meteorobs) IMO Visual Meteor Report (GRALE), Night of 20-Feb-2001
Note that these reports are not NEARLY as daunting as they may at first
appear to newcomers... For one thing, there are a variety of tools that
have been developed to make meteor data entry easy, and to do the various
calculations and look-ups which appear on these reports. (I myself use an
Excel spreadsheet I first developed in 1998.)
In addition, there is complete information on all these fields available
from a wide variety of printed and on-line sources... For example, browse
the IMO Visual Observing Web site http://www.imodot net/visual for complete
details on the fields found below. Or for a Guide aimed more at the new-
comer to meteors, see the NAMN Observing Guide, on the Web at:
http://Web.InfoAvedot net/~meteorobs/guide.html
Clear skies!
Lew Gramer
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IMO METEOR SUMMARY REPORT
Observer's Name Lewis J. Gramer IMO Observer Code GRALE
EVENING Date 20-Feb-2001 IMO Showers Active that Date:
MORNING Date 21-Feb-2001 ACE,VIR,DLE,GNO
Session Start Time (UT) 4:55
Session End Time (UT) 10:55
Observing Site Location: West Summerland Key, FL, USA
IMO Location Code: (None?)
Site Latitude 24:38:58N Longitude 081:15:40W Elevation 0m
Observing Methods ("x" all that apply:)
X =Manual (pencil/paper) =Tape Recorder X =Plotting Charts
=Other - describe here:
Showers Observed (Enter all IMO 3-letter or other shower mnemonics you used):
NAME Delta Leonids Virginids Alpha Centaurids Anthelion
3LC DLE VIR ACE "ANT"
LAMBDA 164 172 225 163
DELTA +18 +06 -63 +07
WIDTH 5 10 5 15
(R.A.) 10:56 11:28 15:00 10:52
NAME Delta Velorids Omicron Centaurids Theta Centaurids Northern Apex
3LC "DVE" "OCE" "TCE" "NAX"
LAMBDA 133 181 216 238
DELTA -53 -58 -43 -05
WIDTH 5 5 5 15
(R.A.) 08:52 12:04 14:24 15:52
NAME Southern Apex Sporadics (non-shower meteors)
3LC "SAX" Spor
LAMBDA 238 (None)
DELTA -35 (None)
WIDTH 15 (None)
(R.A.) 15:52 (None)
SUMMARY of All Meteor Data for the Session
Per Start End CFV Teff LM F DLE VIR ACE Spor TOTAL
1 4:55 6:26 155+05 0.92 7.50 1.030 2 2 0 13 17
2 6:27 7:56 190+10 0.92 7.47 1.048 2 2 0 16 20
3 9:08 10:55 210+10 1.49 7.05 1.030 1 1 0 25 27
TOTALS/AVERAGES 3.33 7.29 1.035 5 5 0 54 64
Average Magnitudes 3.20 3.20 0.00 3.71 3.63
IMO Visual Meteor Report - Lewis J. Gramer (GRALE), Night of 20-Feb-2001
LIMITING MAGNITUDES CLOUDS / OBSTRUCTIONS
Time Field Count LM Start End % Obscured Duration
4:55 9 48 7.5 6:10 6:27 10% 0:17
4:55 23 23 7.5 6:28 6:45 15% 0:17
6:00 23 24 7.5 10:23 10:33 5% 0:10
6:00 9 47 7.5 10:34 10:55 10% 0:21
6:34 23 21 7.5 0:00
6:34 10 40 7.5 0:00
7:48 10 29 7.4 0:00
7:48 23 19 7.5 0:00
9:30 24 27 7.3 0:00
9:30 11 67 7.2 0:00
10:00 24 26 7.1
10:00 11 45 6.9
10:40 24 25 7.0
10:40 13 24 6.9
10:50 24 17 6.6
10:55 24 11 5.8
BREAKS
Start End Duration Breaktime
5:34 6:00 0:26 Per Period
6:45 6:53 0:08 Period 1 0:26
7:15 7:24 0:09 Period 2 0:22
7:38 7:43 0:05 Period 3 0:02
10:08 10:09 0:01
10:43 10:44 0:01
Deadtime 0:00:05 / meteor 0:00:30 / plot
Total - logs plus # Plots Per Period
Period 1 0:09:55 17
Period 2 0:11:40 20
Period 3 0:15:45 27
IMO Visual Meteor Report - Lewis J. Gramer (GRALE), Night of 20-Feb-2001
MAGNITUDE DISTRIBUTIONS
0 1 2 3 4 5 6 7 TOTAL (=Check)
DLE 0 1 1 0.5 1 1.5 0 0 5 5
VIR 0 0.5 1.5 1 1 0.5 0.5 0 5 5
ACE 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0
Spor 0 2 4 12 22.5 10.5 2 0 53 54
TOTAL 0 3.5 6.5 13.5 24.5 12.5 2.5 0 63 63
TRAIN DATA - Totals Per Shower Train Data
Meteors w/ trains 3
Percentage with 5% DLE VIR ACE Spor TOTAL
Number 0 0 0 3 3
Percent 0% 0% 6%
GENERAL COMMENTS ABOUT SESSION - Use as many lines as needed below this one
Second night plotting in a row.
Temp 72oF, wind 10-20 mph.
Seeing 7 of 10.
At the Winter Star Party 2001.
Watched with members of Florida Keys Astronomy Club.
NON-IMO SHOWER DATA: (Radiants plotted per LUNRO Weekly Outlook)
NAME CODE TOTAL MAG 1 MAG 2 MAG 3 MAG 4 MAG 5 MAG 6 AVG MAG
Anthelion ANT 4 1 1 1.5 0.5 2.88
Delta Vel DVE 0
Omicron Cen OCE 2 1 1 3.50
Theta Cen TCE 0
North Apex NAX 2 1.5 0.5 4.25
South Apex SAX 0
Also found potential suspect radiant at 14:30+09, not far from Xi Bootis.
Only candidates speed 3 or faster considered; labeled "XIB" in Comments.
Radiant had 4 strong matches, 4 weaker one (10-20o error), distributed so:
NAME CODE TOTAL MAG 1 MAG 2 MAG 3 MAG 4 MAG 5 MAG 6 AVG MAG
Xi Boo? "XIB" 8 3 1 2.5 1.5 3.31
Original BRNO plot charts will be postal mailed to Mark Davis of NAMN.
IMO Visual Meteor Report - Lewis J. Gramer (GRALE), Night of 20-Feb-2001
METEOR DATA
Time Mag Spd Shwr Cnstl DCV Clr Trn Chart Accu Comments
4:58:00 5.5 3 Spor 10 8 I
5:01:00 5 3 Spor 10 8 I XIB?
5:04:00 4.5 3.5 Spor 20 8 II
5:05:00 4 1 Spor 20 8 I NAX? (13o long,
mag varied 4->6->4)
5:16:00 2 3 VIR 30 org 8 I ANT?
5:21:00 4 3 VIR 40 8 I ANT?
5:24:00 4.5 2 Spor 20 8 II
5:26:00 5 3 Spor 20 8 I
5:29:00 6 2.5 Spor 10 8 I
5:32:00 2 3 DLE? 40 8 II VIR?
6:04:00 4 3 Spor 10 8 I
6:08:00 3.5 5 Spor 20 8 II
6:13:00 4.5 2.5 Spor 30 5 II
6:15:00 3 3.5 Spor 30 8 II
6:19:00 4.5 3.5 DLE? 20 5 III ANT?
6:20:00 5.5 4 Spor 0 5 I
6:24:00 3 4 Spor 50 5 I
6:27:00 5.5 3 VIR 10 8 I
6:28:00 5 4 Spor 10 5 II
6:30:00 1 3.5 DLE? 60 5 II
6:33:00 4 4 Spor 20 8 I
6:35:00 4 4 Spor 30 5 I Really within 1 sec!
6:36:00 4 4 Spor 20 5 I Really within 1 sec!
6:42:00 1 2 Spor 20 yel 5 I ANT
6:43:00 3.5 4 Spor 20 8 II
6:58:00 4 4 Spor 20 5 I
7:02:00 3 3 Spor 30 5 I Mag varied 3->4->3
7:11:00 3 3 Spor 30 5 II XIB
7:14:00 3.5 4 Spor 20 5 I
7:28:00 4.5 3.5 Spor 20 5 II XIB
7:33:00 1.5 3 VIR? 30 11 II DLE?
7:34:00 2 3 Spor 20 11 I XIB?
7:45:00 3 3 Spor 30 5 I
7:46:00 5 4.5 DLE? 10 5 II
7:50:00 4 4 Spor 10 5 II NAX?
7:54:00 3 3.5 Spor 5 II
7:55:00 4 5 Spor 8 II "Very" fast!
9:14:00 2 5 Spor 20 5 II XIB?
9:16:00 4 3.5 Spor 10 5 I
9:20:00 3 4 Spor 40 9 II
9:23:00 4 4 Spor 20 5 II OCE? XIB?
9:26:00 3 4 Spor 30 5 I OCE?
9:30:00 4.5 3 Spor 20 5 II
9:31:00 5 5 Spor 0 5 II
9:41:00 4 4 Spor 10 5 I XIB
9:44:00 4 4 Spor 30 9 II
9:47:00 4 4 Spor 9 ?
9:48:00 4 4 Spor 3
9:52:00 3.5 3.5 DLE 30 5 I VIR?
9:58:00 2 5 Spor 40 0.5 3 I XIB
10:04:00 4.5 5 Spor 10 0.5 5 I
10:14:00 5 3.5 Spor 20 9 I
10:17:00 4 2.5 Spor 20 9 I
10:20:00 4.5 3 Spor 10 9 I
10:28:00 5 1 Spor 20 9 I Gorgeous slow!
10:31:00 4 5 Spor 3 I
10:34:00 ? ? Spor 5 ? Plot w/o data!
10:35:00 3 4 Spor 30 9 II
10:38:00 1 3 Spor 20 yel/org + 5 I
10:40:00 4 4 Spor 30 9 I
10:46:00 3.5 3.5 Spor 10 9 II
10:48:00 2 3 Spor 20 5 I
10:50:00 3 4 Spor 30 3 II
10:52:00 3 2.5 VIR? 10 5 I
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