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