We present the report of Geminids 2002 visual data totaled by the Nippon Meteor Society
We used the visual data from 4th Dec. to 18th Dec. that was contributed until 21:00 18th Dec.2001 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 2002 Activity
Daily Activity
Hourly Activity
Result per Day Time JST UT N Teff GEM HRave ZHRave Err. -------------------------------------------------------------- Dec. 5d 01:00 4d 16:00 1 65 1 0.9 1.9 1.9 Dec. 6d 01:00 5d 16:00 0 - - - - - Dec. 7d 01:00 6d 16:00 0 - - - - - Dec. 8d 01:00 7d 16:00 1 30 5 10.0 15.1 6.8 Dec. 9d 01:00 8d 16:00 0 - - - - - Dec. 10d 01:00 9d 16:00 5 240 63 15.8 19.4 2.4 Dec. 11d 01:00 10d 16:00 7 420 144 20.6 26.1 2.2 Dec. 12d 01:00 11d 16:00 6 360 146 24.3 35.8 3.0 Dec. 13d 01:00 12d 16:00 13 625 575 55.2 79.8 3.3 Dec. 14d 01:00 13d 16:00 59 2961 2667 54.0 128.0 2.5 Dec. 15d 01:00 14d 16:00 160 7564 6993 55.5 138.5 1.7
Result per Hour
Time JST UT N Teff GEM HRave ZHRave Err.
--------------------------------------------------------------
Dec.12d 23:30 12d 14:30 1 60 51 51.0 68.2 9.5
Dec.13d 0:30 12d 15:30 3 120 85 42.5 66.4 7.2
Dec.13d 1:30 12d 16:30 7 330 278 50.5 78.9 4.7
Dec.13d 2:30 12d 17:30 1 40 59 88.5 98.7 12.8
Dec.13d 3:30 12d 18:30 1 75 102 81.6 96.9 9.6
Dec.13d 22:30 13d 13:30 1 30 35 70.0 143.6 24.3
Dec.13d 23:30 13d 14:30 4 210 87 24.9 87.7 9.4
Dec.14d 0:30 13d 15:30 12 520 312 36.0 117.4 6.6
Dec.14d 1:30 13d 16:30 14 680 680 60.0 148.2 5.7
Dec.14d 2:30 13d 17:30 9 486 560 69.1 127.4 5.4
Dec.14d 3:30 13d 18:30 10 525 541 61.8 116.9 5.0
Dec.14d 4:30 13d 19:30 8 450 365 48.7 142.4 7.5
Dec.14d 5:30 13d 20:30 1 60 87 87.0 113.7 12.2
Dec.14d 20:30 14d 11:30 3 190 131 41.4 189.8 16.6
Dec.14d 21:30 14d 12:30 5 256 195 45.7 165.3 11.8
Dec.14d 22:30 14d 13:30 8 369 326 53.0 175.3 9.7
Dec.14d 23:30 14d 14:30 21 876 729 49.9 158.0 5.9
Dec.15d 0:30 14d 15:30 27 1136 1022 54.0 145.1 4.5
Dec.15d 1:30 14d 16:30 34 1564 1340 51.4 119.9 3.3
Dec.15d 2:30 14d 17:30 21 1011 1321 78.4 147.4 4.1
Dec.15d 3:30 14d 18:30 24 1227 1127 55.1 124.7 3.7
Dec.15d 4:30 14d 19:30 15 825 569 41.4 125.2 5.2
Dec.15d 5:30 14d 20:30 2 110 233 127.1 167.9 11.0
Number of Data: 252
Total Observing Time: 12,265min. (=204.42hr)
Total Observers: 10,592 meteors(Leonids)
Observers: 55 persons