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(meteorobs) Detailed Draconid Report from Japan (fwd)
Below is a much more detailed report from the Nippon Meteor Society on the
October Draconid activity for October 8/9. This one includes the average
numbers of shower meteors seen, in addition to the ZHR data.
The peak rate reported was an average of 55 GIA per hour, between 1300 and
1400 UTC, as averaged among their various observers active at that time.
The breakdown into 10 minute periods shows the highest rate at about 16
meteors per ten minute bin, from 1300 to 1320 UTC. Note that the average
number seen in the 10 minute bin is not reported directly, but has been
multiplied by 6 to give an hourly rate of 96/94 for those time periods,
which is then applied to the ZHR formulae.
Also note that the report lists the total number of "Perseid" meteors seen,
which is probably a typo -- Giacobinid (October Draconid) is probably
intended.
** begin forwarded message (from IMO-News) **
Date: Sun, 11 Oct 1998 19:31:00 +0900
From: =?ISO-2022-JP?B?GyRCOWJNfCEhMm0+NBsoQg==?= <QGA00120@nifty.ne.jp>
Subject: Draconids in Japan : Preliminary results
To: imo-news@imodot net, peter@max.arc.nasadot gov
Visual results in Japan (The Nippon Meteor Society).
ZHR has been computed with:
- gamma = 1.0 (correction of Radiant elevation)
- r = 2.6 (IMO Handbook for Visual Mereor Observers , Page 210)
(1) Hourly Result
- excluding:observations under unfavourable condition
(T<30m, Lm<4.0, Cl>0.4, RP-h<10deg)
----------------------------------------------------------------
UT JST N ave-HR(Dra) ZHR(Dra) SD Remarks
----------------------------------------------------------------
Oct.8, 1998
09:00-10:00 8/9 18:30 4 7 41 21
10:00-11:00 8/9 19:30 7 7 35 19
11:00-12:00 8/9 20:30 14 13 105 45
12:00-13:00 8/9 21:30 18 24 304 133
13:00-14:00 8/9 22:30 25 55 585 319
14:00-15:00 8/9 23:30 20 14 230 135
15:00-16:00 8/9 00:30 8 3 156 123
16:00-17:00 8/9 01:30 1 2 140 -
----------------------------------------------------------------
Observers (38members) :
T.Hashimoto, I.Hatsukade, Ddot ito, K.Izumi, H.Izumimoto, Y.Kawai,
S.Kaya, I.Kisanuki, W.Kobayashi, K.Kuragaki, K.Maeda, K.Mameta,
T.Maruyama, K.Nakamura, Y.Nojima, K.Nozaki, H.Okayasu, K.Osada,
M.Sakaguchi, M.Sato, T.Sato, M.Takanashi, A.Takeda, S.Takeda,
K.Tanaka, Si.Tanaka, Sy.Tanaka, K.Terakubo, Y.Tonomura, T.Torigoe,
S.Uchiyama, S.Uehara, Y.Yabu, M.Yamamoto, S.Yanagi, S.Yoshida,
H.Yoshidome, S.Yoshino
Total observations (Oct.8) : 4,636minutes (=77.27h)
Total number of Perseid meteors (Oct.8) : 1,862
(2) 10-Minutely Result (11:00-15:00 UT)
- excluding:observations under unfavourable condition
(T<5m, Lm<4.0, Cl>0.4, RP-h<10deg)
----------------------------------------------------------------
UT JST N ave-HR(Dra) ZHR(Dra) SD Remarks
----------------------------------------------------------------
11:00-11:10 8/9 20:05 3 2 13 23
11:10-11:20 8/9 20:15 4 2 12 23
11:20-11:30 8/9 20:25 5 17 147 34
11:30-11:40 8/9 20:35 5 13 126 143
11:40-11:50 8/9 20:45 5 18 165 86
11:50-12:00 8/9 20:55 5 17 211 120
12:00-12:10 8/9 21:05 8 18 218 97
12:10-12:20 8/9 21:15 8 20 248 111
12:20-12:30 8/9 21:25 8 21 265 166
12:30-12:40 8/9 21:35 8 31 412 201
12:40-12:50 8/9 21:45 12 61 530 304
12:50-13:00 8/9 21:55 14 64 614 280
13:00-13:10 8/9 22:05 13 96 943 595
13:10-13:20 8/9 22:15 15 94 904 565
13:20-13:30 8/9 22:25 15 64 616 437
13:30-13:40 8/9 22:35 16 42 483 223
13:40-13:50 8/9 22:45 15 26 307 197
13:50-14:00 8/9 22:55 13 30 371 227
14:00-14:10 8/9 23:05 10 25 325 145
14:10-14:20 8/9 23:15 11 14 196 143
14:20-14:30 8/9 23:25 9 16 230 188
14:30-14:40 8/9 23:35 4 8 90 110
14:40-14:50 8/9 23:45 2 9 224 110
14:50-15:00 8/9 23:55 2 9 239 114
---------------------------------------------------------------------
Observers (23members) :
T.Hashimoto, Ddot ito, H.Izumimoto, Y.Kawai, W.Kobayashi, K.Kuragaki,
K.Mameta, K.Nakamura, H.Okayasu, K.Osada, M.Sato, T.Sato,
M.Takanashi, A.Takeda, S.Takeda, Si.Tanaka, Sy.Tanaka, K.Terakubo,
S.Uchiyama, S.Uehara, Y.Yabu, S.Yanagi, S.Yoshino
Total observations (Oct.8) : 2,340minutes (=39.00h)
Total number of Perseid meteors (Oct.8) : 1,402
See The Nippon Meteor Society Web Page.
http://www2u.biglobe.ne.jp/~nms/index_e.html
--------------------------------------------------------------------
Masaaki Takanashi (The Nippon Meteor Society / Gotemba city, JAPAN)
E-Mail : QGA00120@nifty.ne.jp
NMS-Web Page : http://www2u.biglobe.ne.jp/~nms/index_e.html
--------------------------------------------------------------------
A
** end of forwarded message **
James Richardson
Tallahassee, Florida
Operations Manager / Radiometeor Project Coordinator
American Meteor Society (AMS)
http://www.serve.com/meteors/
References: