Nippon Meteor Society

Quadrantids 2003 Visual Observations Report by NMS

Last Update : 2003/02/10



We present the report of Quadrantids 2003 visual data totaled by the Nippon Meteor Society


Quadrantids 2003 report by Nippon Meteor Society (NMS)- 6th Jan. 2003

We used the visual data that was contributed until 21:00 6th Jan. 2003 to the mailing list of meteor observers and researcher in Japan (NMS-ML) and direct e-mail.

Adopted data is personal observation, radiant height >10deg, limiting magnitude>4.5mag. and clouds <40%.
Zenithal hourly rate(ZHR), which are we visible meteors on the ideal condition, is calculated from reported data by using luminous index = 2.5 and radiant height correction = 1/sin(RP.H) that based on the method of International Meteor Organization(IMO).
<Err.> on the table means ZHR division by square root of total meteor number.

The Chart of Quadrantids 2003 Activity
Daily Activity
Hourly Activity



                   Result per Day

  Time  UT        JST       N  QUA Teff   HR    ZHR  Err.
----------------------------------------------------------
Dec. 27d 18:00  28d 03:00   0    -    -    -     -    -
Dec. 28d 18:00  29d 03:00   1    2   60   2.0   3.8  2.7
Dec. 29d 18:00  30d 03:00   0    -    -    -     -    -
Dec. 30d 18:00  31d 03:00   1    4   70   3.4   7.3  3.6
Dec. 31d 18:00   1d 03:00   1    0   60   0.0   0.0   -

Jan.  1d 18:00   2d 03:00   5   27  300   5.4  10.0  1.9
Jan.  2d 18:00   3d 03:00   4   15  205   3.9  31.1  8.0
Jan.  3d 18:00   4d 03:00  16  640  808  48.0 137.1  5.4
Jan.  4d 18:00   5d 03:00  15  131  780   9.0  23.0  2.0
Jan.  5d 18:00   6d 03:00   1    5   60   5.0   6.5  2.9




                   Result per Hour

  Time  UT        JST     N   QUA  Teff   HR    ZHR   Err.
-----------------------------------------------------------
Jan. 1d 16:30  2d 01:30   1     2   60    2.0    8.9    6.3
Jan. 1d 17:30  2d 02:30   1     3   60    3.0    7.0    4.1
Jan. 1d 18:30  2d 03:30   1     6   60    6.0   10.1    4.1
Jan. 1d 19:30  2d 04:30   1     7   60    7.0   11.5    4.3
Jan. 1d 20:30  2d 05:30   1     9   60    9.0   12.4    4.1

Jan. 2d 16:30  3d 01:30   2    12  115    5.8   37.5   10.8
Jan. 2d 17:30  3d 02:30   1     2   60    2.0   41.4   29.3
Jan. 2d 18:30  3d 03:30   0    -    -      -      -     -
Jan. 2d 19:30  3d 04:30   0    -    -      -      -     -
Jan. 2d 20:30  3d 05:30   1     1   30    2.0    8.0   8.0
Jan. 2d 21:30  3d 06:30   0    -    -      -      -     -

Jan. 3d 16:30  4d 01:30   1    23   40   34.5  188.8  39.4
Jan. 3d 17:30  4d 02:30   1    42   50   50.4  170.6  26.3
Jan. 3d 18:30  4d 03:30   5   155  250   35.4  103.5   8.3
Jan. 3d 19:30  4d 04:30   4   180  238   45.4  128.8   9.6
Jan. 3d 20:30  4d 05:30   5   240  230   64.8  160.3  10.3

Jan. 4d 15:30  5d 00:30   1     4   60    4.0   23.3  11.7
Jan. 4d 16:30  5d 01:30   1     9   60    9.0   28.5   9.5
Jan. 4d 17:30  5d 02:30   3    16  120    5.7   12.5   3.1
Jan. 4d 18:30  5d 03:30   5    38  240    8.2   26.1   4.2
Jan. 4d 19:30  5d 04:30   4    46  240   11.5   25.7   3.8
Jan. 4d 20:30  5d 05:30   1    18   60   18.0   21.9   5.2



Total Observing Time: 2,343min. (=39.05hr)
Total Observers: 824 meteors (QUA)

Observers: 14 persons





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