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(meteorobs) Xi Bootids Strong 02-5/6
From: SMTP%"ksyo@pinelanddot net" 7-FEB-2000 22:24:39.27
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Subj: Observations 02-5/6-00
Message-ID: <38A034F8.ACA63583@pinelanddot net>
Date: Tue, 08 Feb 2000 10:23:37 -0500
From: "Kim S. Youmans" <ksyo@pinelanddot net>
Reply-To: ksyo@pinelanddot net
Organization: Household
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To: GSFC <GLIBA@grovx3.gsfc.nasadot gov>,
Robert Lunsford <lunro.imo.usa@prodigydot net>
Subject: Observations 02-5/6-00
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George and Bob,
Though I have tried repeatedly to post my "Bootid-peak" night's
observation to the list, it just doesn't seem to go through. I thought
you both might be interested in seeing it, however, so here is the
narrative/report.
*******************************************************************************************
Despite my reluctance to go out tonight due to another round of
sub-freezing
temps, I was rewarded nonetheless for my efforts. Had it not been for
the desire
to get consecutive night coverage of the Xi Bootids, I would have just
stayed home.
I would have missed out.
The rates remained strong and this was a bit of a surprise. The
skies were crystal clear.
In fact, I was a bit shocked to count 26 stars in Leo during one count
1st period, for a brief
LM of +6.81, the highest I have yet to record. I was at that time able
to see a faint star
near Regulus I'd never counted before. That was another surprise.
The Xi Bootids put on a most impressive performance. A whopping 10
candidates crossed
a possible radiant plotted near 14hr11min +16. The last period, with
Bootes near zenith, saw
4 candidates. This pleasing result proved to be surprise #3. I used an
area of only 6 degrees diameter to construct the radiant.
The best surprise of all, however, was a slow fireball that came
from the direction of
Virgo towards the ENE horizon at 07:58 UT, only eight minutes into my
observation. The
distinctly aqua colored meteor quickly reached a brightness of -5/-6
then ended with a burst
that was at least -7. The wake/trail was plainly visible in the glow of
the fireball. No
sounds or persistent train were noted. This has to be among the top four
most memorable
fireballs I have seen!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
OBSERVER: Kim S. Youmans (YOUKI) DATE:02-05/06-00
BEGIN: 07:50UT END11:10UT LOCATION: Treutlen Co, Ga.
82. 24' 25" W; 32. 24' 45" N METHOD: Tape
Elev 240 ft Facing South
3 periods, sky 0% obscured, No breaks
Period 1 07:50 - 09:01 UT SPO(17)
Dead time =6 min Teff = 1.08 F= 1.00
SolarLong. 316.856x
Period 2 09:01 - 10:07 UT SPO(9)VIR(1)
Dead time = 5 min Teff = 1.02 F= 1.00
SolarLong. 316.905x
Period 3 10:07 - 11:10 UT SPO(15)
Dead time = 5 min Teff = .97 F= 1.00
SolarLong. 316.950x
Limiting Magnitudes
08:11 UT (IMO 11)+6.32 (IMO 9)+6.61
08:40 UT (IMO 11)+6.38 (IMO 9)+6.81
09:10 UT (IMO 11)+6.32 (IMO 9)+6.64
09:40 UT (IMO 11)+6.38 (IMO 9)+6.61
10:10 UT (IMO 11)+6.38 (IMO 9)+6.61
10:40 UT (IMO 11)+6.38 (IMO 9)+6.52
Center FOV - Midperiod (UT)
Period 1 186x +13x
Period 2 203x +14x
Period 3 217x +18x
Showers Observed
VIR(1) 163x +14x
SPO(41)
Mag Distribution
Period 1
SPO(17) -7(1) 0(1) +1(1) +2(3) +3(2) +4(6) +5(3)
Period 2
VIR(1) +3(1)
SPO(9) 0(1) +2(2) +3(1) +4(2) +5(3)
Period 3
SPO(15) +1(1)+2(4) +3(4) +4(1) +5(5)
Meteor Data
Period 1
(Time UT, Shower, Mag, Speed, Accuracy/plot #)
01 07:51 SPO +2 2 2 DA
02 07:55 SPO +3 3 2 DB
03 07:58 SPO -7 2 3 DC See remarks
04 08:04 SPO +4 4 4 DD
05 08:08 SPO +2 1 2 DE
06 08:13 SPO +5 3 1 DF
07 08:15 SPO +4 3 N/A
08 08:16 SPO +5 3 3 DG
09 08:25 SPO +4 3 3 DH
10 08:29 SPO 0 3 1 DI XBO Long Path
11 08:38 SPO +1 3 N/A
12 08:43 SPO +4 3 2 DJ
13 08:47 SPO +3 4 2 DK XBO(?)
14 08:47 SPO +2 3
15 08:49 SPO +4 2 4 DL
16 08:54 SPO +4 3 1 DM XBO
17 08:55 SPO +5 3 N/A
Period 02
(Time UT, Shower, Mag, Speed, Accuracy/plot #)
18 09:09 SPO +4 4 N/A
19 09:13 SPO +2 2 2 DN
20 09:19 SPO +5 2 1 DO
21 09:30 SPO +3 3 2 DP XBO
22 09:34 SPO +4 3 2 DQ XBO
23 09:43 VIR +3 2 2 N/A
24 09:50 SPO 0 3 2 DR XBO
25 09:50 SPO +2 2 N/A
26 10:04 SPO +5 2 1 DS
27 10:06 SPO +5 2 3 DS
Period 03
(Time UT, Shower, Mag, Speed, Accuracy/plot #)
28 10:11 SPO +5 3 N/A
29 10:24 SPO +2 2 N/A Very brief
30 10:24 SPO +4 4 2 DT Train
31 10:30 SPO +5 2 3 DU
32 10:40 SPO +1 2 N/A
33 10:40 SPO +3 4 2 DV Train
34 10:47 SPO +2 2 N/A
35 10:47 SPO +3 3 2 DW XBO Train
36 10:50 SPO +2 4 N/A Train
37 10:52 SPO +5 4 2 DX
38 10:57 SPO +3 4 1 DZ XBO
39 10:57 SPO +2 3 2 DY XBO
40 10:57 SPO +3 2 N/A
41 11:05 SPO +5 3 DDA XBO
42 11:07 SPO +5 4 N/A
Remarks: I accidentally labeled meteors 26 and 27 both "DS."
Meteor 3 was a -7 fireball, bluish green. It quickly ramped
up to a brightness of -5/-6 then had a terminal burst that made it
to at least -7. The wake was visible in the fireball's glow.
It had a path length of about 25 degrees, ans was somewhat slow,
maybe 10 degrees per second.
Xi Bootids: I have a "very good/excellent" confidence level
on all meteors plotted as XBO's, with the exception of meteors
DZ (speed of 4 near radiant) and DDA, the path length of which
MAY be a bit long, though I am not so confidant in my ability
to plot beginning and end points. DDA had the correct speed.
Accuracy scale(1-5) 1/best 2/good 3/fair 4/poor 5/worst
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<tt>George and Bob,</tt>
<br><tt> Though I have tried repeatedly to post
my "Bootid-peak" night's observation to the list, it just doesn't seem
to go through. I thought you both might be interested in seeing it, however,
so here is the narrative/report.</tt>
<br><tt>*******************************************************************************************</tt>
<br><tt> Despite my reluctance to go out tonight
due to another round of sub-freezing</tt>
<br><tt>temps, I was rewarded nonetheless for my efforts. Had it
not been for the desire</tt>
<br><tt>to get consecutive night coverage of the Xi Bootids, I would have
just stayed home.</tt>
<br><tt>I would have missed out.</tt>
<br><tt> The rates remained strong and this was
a bit of a surprise. The skies were crystal clear.</tt>
<br><tt>In fact, I was a bit shocked to count 26 stars in Leo during one
count 1st period, for a brief</tt>
<br><tt>LM of +6.81, the highest I have yet to record. I was at that
time able to see a faint star</tt>
<br><tt>near Regulus I'd never counted before. That was another surprise.</tt>
<br><tt> The Xi Bootids put on a most impressive
performance. A whopping 10 candidates crossed</tt>
<br><tt>a possible radiant plotted near 14hr11min +16. The last period,
with Bootes near zenith, saw</tt>
<br><tt>4 candidates. This pleasing result proved to be surprise
#3. I used an area of only 6 degrees diameter to construct the radiant.</tt>
<br><tt> The best surprise of all, however, was
a slow fireball that came from the direction of</tt>
<br><tt>Virgo towards the ENE horizon at 07:58 UT, only eight minutes into
my observation. The</tt>
<br><tt>distinctly aqua colored meteor quickly reached a brightness of
-5/-6 then ended with a burst</tt>
<br><tt>that was at least -7. The wake/trail was plainly visible
in the glow of the fireball. No</tt>
<br><tt>sounds or persistent train were noted. This has to be among the
top four most memorable</tt>
<br><tt>fireballs I have seen!</tt>
<br><tt>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!</tt>
<br><tt>OBSERVER: Kim S. Youmans (YOUKI) DATE:02-05/06-00</tt>
<br><tt>BEGIN: 07:50UT END11:10UT LOCATION: Treutlen
Co, Ga.</tt>
<br><tt>82. 24' 25" W; 32. 24' 45" N METHOD: Tape</tt>
<br><tt>Elev 240 ft Facing South</tt>
<br><tt>3 periods, sky 0% obscured, No breaks</tt><tt></tt>
<p><tt>Period 1 07:50 - 09:01 UT SPO(17)</tt>
<br><tt>Dead time =6 min Teff = 1.08 F= 1.00</tt>
<br><tt>SolarLong. 316.856x</tt><tt></tt>
<p><tt>Period 2 09:01 - 10:07 UT SPO(9)VIR(1)</tt>
<br><tt>Dead time = 5 min Teff = 1.02 F= 1.00</tt>
<br><tt>SolarLong. 316.905x</tt><tt></tt>
<p><tt>Period 3 10:07 - 11:10 UT SPO(15)</tt>
<br><tt>Dead time = 5 min Teff = .97 F= 1.00</tt>
<br><tt>SolarLong. 316.950x</tt><tt></tt>
<p><tt>Limiting Magnitudes</tt>
<br><tt>08:11 UT (IMO 11)+6.32 (IMO 9)+6.61</tt>
<br><tt>08:40 UT (IMO 11)+6.38 (IMO 9)+6.81</tt>
<br><tt>09:10 UT (IMO 11)+6.32 (IMO 9)+6.64</tt>
<br><tt>09:40 UT (IMO 11)+6.38 (IMO 9)+6.61</tt>
<br><tt>10:10 UT (IMO 11)+6.38 (IMO 9)+6.61</tt>
<br><tt>10:40 UT (IMO 11)+6.38 (IMO 9)+6.52</tt>
<br><tt> </tt><tt></tt>
<p><tt>Center FOV - Midperiod (UT)</tt>
<br><tt>Period 1 186x +13x</tt>
<br><tt>Period 2 203x +14x</tt>
<br><tt>Period 3 217x +18x</tt><tt></tt>
<p><tt>Showers Observed</tt>
<br><tt>VIR(1) 163x +14x</tt>
<br><tt>SPO(41)</tt><tt></tt>
<p><tt>Mag Distribution</tt>
<br><tt>Period 1</tt>
<br><tt>SPO(17) -7(1) 0(1) +1(1) +2(3) +3(2) +4(6) +5(3)</tt><tt></tt>
<p><tt>Period 2</tt>
<br><tt>VIR(1)
+3(1)</tt>
<br><tt>SPO(9) 0(1)
+2(2) +3(1) +4(2) +5(3)</tt><tt></tt>
<p><tt>Period 3</tt>
<br><tt>SPO(15)
+1(1)+2(4) +3(4) +4(1) +5(5)</tt><tt></tt>
<p><tt>Meteor Data</tt>
<br><tt>Period 1</tt>
<br><tt>(Time UT, Shower, Mag, Speed, Accuracy/plot #)</tt>
<br><tt>01 07:51 SPO +2
2 2 DA</tt>
<br><tt>02 07:55 SPO +3
3 2 DB</tt>
<br><tt>03 07:58 SPO -7
2 3 DC
See remarks</tt>
<br><tt>04 08:04 SPO +4
4 4 DD</tt>
<br><tt>05 08:08 SPO +2
1 2 DE</tt>
<br><tt>06 08:13 SPO +5
3 1 DF</tt>
<br><tt>07 08:15 SPO +4
3 N/A</tt>
<br><tt>08 08:16 SPO +5
3 3 DG</tt>
<br><tt>09 08:25 SPO +4
3 3 DH</tt>
<br><tt>10 08:29 SPO 0
3 1 DI XBO
Long Path</tt>
<br><tt>11 08:38 SPO +1
3 N/A</tt>
<br><tt>12 08:43 SPO +4
3 2 DJ</tt>
<br><tt>13 08:47 SPO +3
4 2 DK XBO(?)</tt>
<br><tt>14 08:47 SPO +2
3</tt>
<br><tt>15 08:49 SPO +4
2 4 DL</tt>
<br><tt>16 08:54 SPO +4
3 1 DM XBO</tt>
<br><tt>17 08:55 SPO +5
3 N/A</tt><tt></tt>
<p><tt>Period 02</tt>
<br><tt>(Time UT, Shower, Mag, Speed, Accuracy/plot #)</tt>
<br><tt>18 09:09 SPO +4
4 N/A</tt>
<br><tt>19 09:13 SPO +2
2 2 DN</tt>
<br><tt>20 09:19 SPO +5
2 1 DO</tt>
<br><tt>21 09:30 SPO +3
3 2 DP
XBO</tt>
<br><tt>22 09:34 SPO +4
3 2 DQ
XBO</tt>
<br><tt>23 09:43 VIR +3
2 2 N/A</tt>
<br><tt>24 09:50 SPO 0
3 2 DR
XBO</tt>
<br><tt>25 09:50 SPO +2
2 N/A</tt>
<br><tt>26 10:04 SPO +5
2 1 DS</tt>
<br><tt>27 10:06 SPO +5
2 3 DS</tt><tt></tt>
<p><tt>Period 03</tt>
<br><tt>(Time UT, Shower, Mag, Speed, Accuracy/plot #)</tt>
<br><tt>28 10:11 SPO +5
3 N/A</tt>
<br><tt>29 10:24 SPO +2
2 N/A
Very brief</tt>
<br><tt>30 10:24 SPO +4
4 2 DT
Train</tt>
<br><tt>31 10:30 SPO +5
2 3 DU</tt>
<br><tt>32 10:40 SPO +1
2 N/A</tt>
<br><tt>33 10:40 SPO +3
4 2 DV
Train</tt>
<br><tt>34 10:47 SPO +2
2 N/A</tt>
<br><tt>35 10:47 SPO +3
3 2 DW
XBO Train</tt>
<br><tt>36 10:50 SPO +2
4 N/A
Train</tt>
<br><tt>37 10:52 SPO +5
4 2 DX</tt>
<br><tt>38 10:57 SPO +3
4 1 DZ
XBO</tt>
<br><tt>39 10:57 SPO +2
3 2 DY
XBO</tt>
<br><tt>40 10:57 SPO +3
2 N/A</tt>
<br><tt>41 11:05 SPO +5
3
DDA XBO</tt>
<br><tt>42 11:07 SPO +5
4 N/A</tt>
<br><tt> </tt><tt></tt>
<p><tt>Remarks: I accidentally labeled meteors 26 and 27 both "DS."</tt><tt></tt>
<p><tt>Meteor 3 was a -7 fireball, bluish green. It quickly ramped</tt>
<br><tt>up to a brightness of -5/-6 then had a terminal burst that made
it</tt>
<br><tt>to at least -7. The wake was visible in the fireball's glow.</tt>
<br><tt>It had a path length of about 25 degrees, ans was somewhat slow,</tt>
<br><tt>maybe 10 degrees per second.</tt><tt></tt>
<p><tt>Xi Bootids: I have a "very good/excellent" confidence level</tt>
<br><tt>on all meteors plotted as XBO's, with the exception of meteors</tt>
<br><tt>DZ (speed of 4 near radiant) and DDA, the path length of which</tt>
<br><tt>MAY be a bit long, though I am not so confidant in my ability</tt>
<br><tt>to plot beginning and end points. DDA had the correct speed.</tt><tt></tt>
<p><tt>Accuracy scale(1-5) 1/best 2/good 3/fair 4/poor 5/worst</tt></html>
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