We present the report of Geminids 2003 visual data totaled by the Nippon Meteor Society
We used the visual data from 6th Dec. to 17th Dec. that was contributed 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, 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 = 2.0 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 Geminids 2003 Activity
Daily Activity
Hourly Activity
Result per Day Month day Nind. Teff GEM HRave ZHRave Err. --------------------------------------------------- 12 6/7 3 8.3 44 5.3 12.2 1.8 12 7/8 1 4.0 25 6.3 12.5 2.5 12 8/9 3 6.3 48 7.6 19.6 2.8 12 9/10 0 0 0 - - - 12 10/11 0 0 0 - - - 12 11/12 0 0 0 - - - 12 12/13 7 15.9 301 18.9 63.8 3.7 12 13/14 34 65.4 1470 22.5 84.7 2.2 12 14/15 28 70.3 3862 54.9 174.3 2.8 12 15/16 14 19.9 354 17.8 53.2 2.8 12 16/17 1 1.0 4 4.0 15.5 7.8
Result per Hour
Month day Nind. Teff GEM HRave ZHRave Err.
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12 13 20 1 1.0 28 28.0 100.4 19.0
12 13 21 1 1.0 45 45.0 114.0 17.0
12 13 22 2 2.0 102 51.0 154.1 15.3
12 13 23 9 9.0 163 18.1 73.3 5.7
12 14 0 12 11.2 240 21.4 90.6 5.8
12 14 1 12 10.3 233 22.6 76.6 5.0
12 14 2 13 10.5 152 14.5 52.4 4.3
12 14 3 13 10.3 242 23.5 86.6 5.6
12 14 4 2 1.0 17 17.0 47.8 11.6
12 14 5 9 7.1 170 23.9 113.8 8.7
12 14 20 3 2.7 165 61.1 232.5 18.1
12 14 21 4 2.8 142 50.7 166.6 14.0
12 14 22 11 8.1 446 55.1 191.6 9.1
12 14 23 14 11.1 611 55.0 176.6 7.1
12 15 0 16 13.2 581 44.0 140.3 5.8
12 15 1 12 10.8 626 58.0 172.2 6.9
12 15 2 12 10.2 570 55.9 171.3 7.2
12 15 3 7 5.5 348 63.3 179.3 9.6
12 15 4 4 3.0 185 61.7 192.9 14.2
12 15 5 3 3.0 188 62.7 234.8 17.1
12 15 21 2 2.0 49 24.5 73.1 10.4
12 15 22 1 1.0 24 24.0 44.6 9.1
12 15 23 5 4.8 89 18.5 59.7 6.3
12 16 0 3 2.7 50 18.5 48.6 6.9
12 16 1 4 3.5 58 16.6 47.3 6.2
12 16 2 4 3.5 70 20.0 53.9 6.4
12 16 3 3 2.5 14 5.6 35.2 9.4
Total Observing Time: 191.1 hr
Total Observations: 6,108 meteors(Leonids)
Observers: 51 persons