Leonids 2003 Visual Observations Report by NMS

Last Update : 2003/12/07

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

Leonids 2003 report by Nippon Meteor Society (NMS)- 25th Nov. 2003

We used the visual data that was contributed until 24th ANov. 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>4.0mag. 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 = 2.2 and radiant height correction = 1/sin(RP.H) that based on the method of International Meteor Organization(IMO).

The Chart of Leonids 2003 Activity

                 Result per Day

Month  day  Nind.  Teff  LEO  HRave  ZHRave  Err.
  11  13/14   22   50    475    9.5    47.6   2.2
  11  14/15    0    0      0    -       -     -
  11  15/16    0    0      0    -       -     -
  11  16/17   12   15.1  105    7.0    42.8   4.2
  11  17/18   14   23.7  403   17.0    70.6   3.5
  11  18/19    2    1.3   19   14.6    98.3  22.6 (informal)
  11  19/20    7   15.6  338   21.7   119.0   6.5
  11  20/21    0    0      0    -       -     -
  11  21/22    5    9.0   90   10.0    24.0   2.5
  11  22/23    2    6.0  152   25.3    24.3   2.0
  11  23/24    1    4.5  121   26.9    22.9   2.1

Nind.: number of ovserber
Teff : total time of ovservation
Err. : ZHRave/sqrt(LEO)

Total Observing Time: 123.9hr
Total Observers: 1684 meteors (Leonids)

Observers: 35 persons

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