We present the report of Perseids 2003 visual data totaled by the Nippon Meteor Society
We used the visual data that was contributed until 18th Aug. 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 >15deg, limiting magnitude>4.1mag. and clouds <30%.
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 Perseids 2003 Activity
Daily Activity
Result per Day DATE JST Nind Teff PER HRave ZHRave Err. ---------------------------------------------------- Aug. 2 01:00 2 6.8 28 4.1 11.7 2.2 Aug. 3 01:00 7 14.2 96 6.8 13.5 1.4 Aug. 4 01:00 2 6.3 53 8.5 23.4 3.2 Aug. 5 01:00 2 9.0 89 9.9 22.7 2.4 Aug. 6 01:00 1 5.0 66 13.2 29.8 3.7 Aug. 7 01:00 3 6.6 101 15.3 29.3 2.9 Aug. 8 01:00 2 2.3 11 4.9 35.6 10.7 Aug. 9 01:00 0 - - - - - Aug. 10 01:00 7 13.2 205 15.6 34.6 2.4 Aug. 11 01:00 5 6.7 18 2.7 17.7 4.2 Aug. 12 01:00 0 - - - - - Aug. 13 01:00 3 9.1 522 57.5 178.2 7.8 Aug. 14 01:00 0 - - - - - Aug. 15 01:00 0 - - - - - Aug. 16 01:00 1 1.8 39 22.3 63.5 10.2
Total Observing Time: 69.9hr
Total Observers: 1189 meteors (Perseids)
Observers: 19 persons