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(meteorobs) IMO-NEWS: Perseids 1997 in Japan


------- Forwarded Message
Subject: Perseids 1997 in Japan
From: IE3M-KSK@j.asahi-net.or.jp (Koseki Masahiro)
Sender: IE3M-KSK@j.asahi-net.or.jp
Date: 16 Aug 1997 09:57:11 +0900
To: imo-news@imodot net

Mr.Takanashi posted summary report of 1997 Perseids to the NMS-Mailing List

- ----------Forwarded message
From:97/ 8/15 22:32  Masaaki Takanashi <XTJ97731@biglobe.ne.jp>
Title: [nms 3882] 08/15 Perseids
To: nms@iijnet.or.jp
- ---

Weather condition was poor in Japan but some meteor enthusiasts observed 
Perseids
on high mountains, such as Mt.Fuji, or at places where weather forecast
suggested.  Following results from 24 observers were based on data from limited
district, because many observers tended to concentrate in small area.

Results indicate that the peak occurred at Aug.12(14h UT) and coincide with
Arlt's estimation (IMO-News, Aug.15).  Japanese results show smooth connection
with IMO's on following graph though each population index is different(IMO;2.0,
NMS;1.6). See more details showing at:
     http://www2j.meshnet.or.jp/~mton/

Data used here are:
     Received till Aug.15(15 o'clock, JST)
     Rejected observations: cloudiness>=40%, Teff<30min.
Calculation basis:
     Population index of r=1.6
     Zenithal correction coefficient has only two significant figures.

- ----------------------------------------------------------------------------
DATE&TIME DATE&TIME  #Obs T.eff  #Per AVERAGE  S.D. ( Max. : Median: Min. )
  (JST)       (UT)        (min)         ZHR
- ----------------------------------------------------------------------------
10/11d 00h  10d 15h    3    118   20    22.9   12.8 ( 37.6 :  16.9 :  14.1)
10/11d 01h  10d 16h    3    214   57    29.8   14.3 ( 42.7 :  32.4 :  14.4)

11/12d 22h  11d 13h    1     33    2    24.6     -  ( 24.6 :  24.6 :  24.6)
11/12d 23h  11d 14h    4    236   59    49.6   32.0 ( 93.8 :  41.8 :  21.0)
11/12d 00h  11d 15h    1     50   11    32.7     -  ( 32.7 :  32.7 :  32.7)
11/12d 01h  11d 16h    2    120   25    38.0   14.0 ( 47.9 :  38.0 :  28.1)
11/12d 02h  11d 17h    7    360  122    42.4   19.8 ( 65.3 :  32.8 :  18.1)
11/12d 03h  11d 18h    9    411  186    43.1   18.9 ( 85.8 :  37.4 :  24.0)

12/13d 20h  12d 11h    1     64    1    17.9     -  ( 17.9 :  17.9 :  17.9)
12/13d 21h  12d 12h    4    212   37   119.2  103.2 (257.4 : 102.9 :  13.5)
12/13d 22h  12d 13h    7    354  112   122.4  100.9 (282.5 : 118.4 :   9.4)
12/13d 23h  12d 14h    9    495  301   134.7   72.9 (271.0 : 142.8 :  47.0)
12/13d 00h  12d 15h   11    560  393   116.2   52.0 (242.6 : 115.2 :  32.2)
12/13d 01h  12d 16h   11    599  518   102.2   56.1 (216.5 : 103.0 :   4.7)
12/13d 02h  12d 17h   12    696  698   104.2   37.9 (177.8 :  99.9 :  21.9)
12/13d 03h  12d 18h    1     40   19    68.4     -  ( 68.4 :  68.4 :  68.4)

13/14d 21h  13d 12h    1     75    9    85.8     -  ( 85.8 :  85.8 :  85.8)
- ----------------------------------------------------------------------------
Observer     : K.Osada,T.Hashimoto,M.Oka,K.Izumi,H.Nose,K.Mameta,Hiramatsu,
(24observers)  Morioka,Ohnishi,K.Satou,Ddot itou,M.Suzuki,F.Hayashi,Tomari,
               H.Takiguchi,S.Nakayama,N.Fukuda,N.Ishiwatari,W.Murakami,
               M.Toda,Ma.Takanashi,Mi.Takanashi,T.Satomi,S.Yoshida
Total T.eff  : 4637min. (=77.28h)
#Perseids    : 2570
TIME(UT) NMS-ML  IMONews  0        50       100       150       200
- -------  ---*--- ---o---  +---------+---------+---------+---------+
11d 13h    25             |    *
11d 14h    50             |         *
11d 15h    33             |      *
11d 16h    38             |       *
11d 17h    42             |       *
11d 18h    43             |        *
11d 19h                   |
11d 20h                   |
11d 21h            60     |           o
11d 22h            58     |           o
11d 23h            62     |           o
12d 00h            67     |            o
12d 01h            74     |              o
12d 02h                   |
12d 03h                   |
12d 04h                   |
12d 05h            54     |          o
12d 06h                   |
12d 07h            70     |             o
12d 08h           128     |                         o
12d 09h           116     |                      o
12d 10h                   |
12d 11h    18      96     |   *              o
12d 12h   119             |                       *
12d 13h   122             |                       *
12d 14h   135             |                          *
12d 15h   116             |                      *
12d 16h   102             |                   *
12d 17h   104             |                    *
12d 18h    68             |             *
12d 19h                   |
12d 20h                   |
12d 21h            66     |            o
12d 22h                   |
12d 23h            73     |              o
13d 00h            89     |                 o
13d 01h            83     |                o
13d 02h                   |
13d 03h                   |
13d 04h                   |
13d 05h                   |
13d 06h                   |
13d 07h                   |
13d 08h                   |
13d 09h                   |
13d 10h            79     |               o
13d 11h                   |
13d 12h    86             |                *


*==-- *==-- *==-- *==--   Masaaki Takanashi (NMS, Japan) *==--
- --==* --==* --==* --==*  QGA00120@niftyserve.or.jp / XTJ97731@biglobe.ne.jp

------- End of Forwarded Message