May alpha-Bootids appeared on May 23, 1998.


May alpha-Bootids was observed by Hashimoto and Osada on May 23, 1998. This shower appeared on May 30, 1970 in Japan. It was appeared after 28 years. But, unfortunetly, Osada and I were enough to observe each other, because it had been just cloudy in the middle of observation, There are some usuful data as follows.

click here May alpha-Bootids appeared again on May 23, 2000.


<Observers and Observation site>
HASTA : Hashimoto Takema  (Ohtsuki, Yamanashi   N35.63 E138.97)
OSAKA : Osada Kazuhiro    (Oyama, Shizuoka      N35.37 E138.95)
SAKMI : Sakaguchi Mitsue  (Hiroshima, Hiroshima N34.50 E132.67)

<data>
                           May.
                           alpha-
DATE   JST     TIME aM Spo Bootids  Lm CL Dir Obs.   Meth.
-------------------------------------------------------------
May/1998
23 21:15-22:15  60  21 20     1     5.7 0  Z  OSAKA  V
23 22:15-23:15  60  23 16     5     5.7 1  Z  OSAKA  V
23 23:00-00:00  60   6  4     1     5.3 0 Boo HASTA  V
23 00:00-00:35  35   6  1     5     5.3 0 Boo HASTA  V
23 23:00-01:00 120  24 12     2     6.3 3  Z  SAKMI  V

<radiant point>
No.    YMD(UT)     CONST   R.A   DEC   N   d  Wt  Vel   Mag   HR  Obs.
---------------------------------------------------------------------------
 1. 1998 05 23.55  ƒżBoo   212   +16   6   5   1  vS-rS 4.1  3.0  OSAKA  V
 2. 1998 05 23.62  ƒżBoo   216   +21   6   2   2  vS-rS 3.3  3.9  HASTA  V

Time Chart of May alfa-Bootids observed by Osada and Hashimoto.
 21h                           22
 00m  10   20   30   40   50   00   10   20   30   40   50   
 +----+----+----+----+----+----+----+----+----+----+----+----+
        S                        4        5                     OSAKA
 23h                           00
 00m  10   20   30   40   50   00   10   20   30   40   50
 +----+----+----+----+----+----+----+----+----+----+----+----+
  4 5 4  3E                                                     OSAKA
S                      4       4    4    3    41 E              HASTA
S                         -1          1                       E SAKMI

Note)Numeric character is magnitude.
     S:start
     E:end

STAR CHART
No.1 : Plotted by Kazuhiro Osada. All meteors plotting.
No.2 : Plotted by Takema Hashimoto. All meteors plotting.


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