Report of The Giacobinids 1998 (by FAS)

We tried to observe the meteor shower of Giacobinids (draconids) at Oct.8/9.
We observed the meteor shower peak at 13h00m-13h30m(UT). This hourly rate(HR) was 88 (44 meteors per 30 minutes).
And, our members of Fukuoka sub-group observed also this meteor shower.

Report of visual observations

Oct./1998
UT   min   Ls      h    Lm  Cl All Gia   HR  CHR  ZHR   Obs.               Rec.
-----+--+-------+-----+----+--+---+---+----+----+-----+-------------------+-----------------
8.39  30  194.91  59.7  4.1  0   5   3    6   19   23   Hiroki Izumoto     Kiyohide Nakamura
8.41  30  194.93  55.7  5.2  0   9   5   10   18   25   Mikiya Sato        Kazumi Terakubo
8.43  30  194.96  51.5  5.3  1   8   7   14   27   39   Kiyohide Nakamura  Shizuka Tanaka
8.45  30  194.98  47.2  5.0  2   7   4    8   20   32   Tomoko Sato        Hiroki Izumoto
8.47  30  195.00  42.9  5.0  1   4   4    8   18   32   Kazumi Terakubo    Souji Yoshino
8.49  30  195.02  38.6  4.7  0  12  10   20   47   95   Hiroki Izumoto     Mikiya Sato
8.51  30  195.04  34.4  4.7  1  13  11   22   57  134   Shizuka Tanaka     Tomoko Sato
8.53  30  195.06  30.3  4.7  2  28  27   54  157  440   Souji Yoshino      Kazumi Terakubo
8.55  30  195.08  26.3  5.1  2  *1  44   88  212  721   Mikiya Sato        Hiroki Izumoto
8.57  30  195.10  22.5  5.1  3  11   9   18   50  210   Kiyohide Nakamura  Hideki Kondo
8.59  30  195.12  18.8  4.7  6   6   4    8   47  254   Kazumi Terakubo    Tomoko Sato

*1:Count only Giacobinids.
Place:Narusawa village (Yamanashi pref. Japan)
      138d 44.7'E, 35d 26.4'N


Oct./1998
UT   min   Ls      h    Lm  Cl All Gia   HR  CHR  ZHR   Obs.               Rec.
-----+--+-------+-----+----+--+---+---+----+----+-----+-------------------+-----------------
8.53  30  195.06  33.1  5.5  0  25  18   36   58  143   Noriaki Kadota     Masakuni Yamazaki
8.57  30  195.10  24.9  5.5  0  14   9   18   29  106   Masakuni Yamazaki  Noriaki Kadota
8.61  30  195.14  17.3  4.7  0   6   5   10   23  144   Noriaki Kadota     Masakuni Yamazaki
8.66  30  195.18  10.6  4.8  0   2   1    2    4   56   Masakuni Yamazaki  Noriaki Kadota

Place:Hoshino village (Fukuoka pref. Japan)
      130d 44.2'E, 33d 16.0'N


CHR = HR*Fa*Fb,  Fa = 1.6^(6.5-Lm),  Fb = 10/(10-Cl)
ZHR = CHR/(sin h)^1.5

Report of video observations (with image intensifier)

Following images are composed of several flames.
Note: These images are mirrored. 
Copyright: Hideki Kondo.
Place:Narusawa village (Yamanashi pref. Japan)
      138d 44.7'E, 35d 26.4'N

Radiant from video images

The radiant was alpha = 270 deg, delta = +57deg, radius about 1 deg (Oct. 08.52 UT).
This result is from folowing two images; No.1, No.2.
Note: These images are not mirrored. Radiant elevation was about 30 degrees.

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