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Leonids 2011: visual data quicklook

Introduction

This page shows automated results of the Leonids 2011, based on visual observations by volunteers astronomers collected through the report form of the International Meteor Organization (IMO). The information on this page is generated automatically; for scientific use please refer to manual analyses published in scientific journals (such as WGN). Send your feedback regarding this page to Geert Barentsen.

Page contents:

Immy Activity profile
Immy Observer statistics
Immy Data access
Immy Credits and references

Note that the data will finally go into the Visual Meteor Database (VMDB) with manual inspection and rectifications. We are curretly completing the files of 2008-2011. The VMDB is an enormous project - any help will be greatly appreciated.

Page generated: 2012 January 18 at 15:15 UTC.

Activity profile

The graph below shows the ZHR (Zenithal Hourly Rate), which is the number of meteors an observer would see under a very dark sky with the radiant of the shower in zenith.
ZHRmax = 22 based on 258 Leonids reported in 125 intervals, assuming population index r = 2.5

ZHR graph

Time (UTC)Solarlon nINT nLEO ZHR Particle density
2011-11-06 15:18 223.696 5 6 2±1 4 / 109·km3
2011-11-09 05:51 226.310 1 4 6±3 12 / 109·km3
2011-11-14 18:01 231.845 2 13 11±3 22 / 109·km3
2011-11-17 04:18 234.291 26 53 17±2 33 / 109·km3
2011-11-18 03:29 235.265 17 60 22±3 43 / 109·km3
2011-11-18 18:13 235.884 38 54 17±2 33 / 109·km3
2011-11-20 00:25 237.154 23 49 15±2 29 / 109·km3
2011-11-24 06:53 241.467 3 5 6±2 12 / 109·km3
2011-11-27 07:38 244.534 5 3 1±0 2 / 109·km3
2011-11-28 13:42 245.803 5 11 3±1 6 / 109·km3

The reported intervals are automatically added together into the bins shown above, based on the number of meteors and the distribution of the intervals. For each bin, the following parameters are computed:

Observer statistics

Data has been received from 30 observers in 15 countries. Thank you for your efforts!

Spatial distribution of observers

Note: click on the map for an interactive version.

Spatial distribution

Temporal distribution of observers

Temporal distribution

Table of observers

ObserverCountryTeffnLEO
Alexandre Amorim Brazil 2.04h 1
Zsofi Biro Hungary 4.00h 27
Students Bsu Russia 20h 43
Yuguang Chen China 1.50h 9
Apurva Chordia India 1.00h 2
Khimaram Chuadhary India 4.34h 4
William Godley United States 1.00h 2
Karoly Jonas Hungary 3.00h 6
Javor Kac Slovenia 1.74h 2
Shalmalee Kapse India 1.00h 2
Zheng Kuang China 1.67h 1
Alexandr Maidik Ukraine 0.55h 1
Qiang Ma China 1.00h 6
Pierre Martin Canada 1.12h 0
Jozsef Morvai Hungary 3.00h 12
Piraji Patil India 4.04h 3
Pramila Patil India 7.27h 9
Shalan Patil India 10.86h 20
Jurgen Rendtel Germany 25h 108
Jiangao Ruan China 1.17h 3
Jiangao Ruan China 4.42h 3
Aguirre Salvador Mexico 2.00h 6
Francisco José Sevilla Lobato Spain 0.60h 3
Richard Taibi United States 2.97h 10
Istvan Tepliczky Hungary 0.50h 2
Sonal Thorve India 1.00h 0
Michel Vandeputte Belgium 12.47h 15
Jakub Koukal Czech Republic 4.00h 29
Bingqi Tong China 1.72h 7
Shigeo Uchiyama Japan 2.00h 4
Tejaswini Varade India 10.96h 38
Kiran Wani India 2.33h 0
Kiran Wani India 2.99h 3
Weizhou Zeng China 1.47h 8

Data access

Create your own analysis. The files below can be opened using Excel:
leo2011_rate.csv (number of meteors per interval per observer)
leo2011_magn.csv (number of meteors per magnitude bin per observer)

Credits and references

The information on this page may be distributed freely provided credit is given to the International Meteor Organization (IMO) and, when possible, to the individual observers. The computer facilities to generate this page are provided by ESA/RSSD and Armagh Observatory.

References:

  1. Rendtel J. and Arlt R., editors (2009). Handbook for meteor observations; Chapter 9, Analyses and Calculations. International Meteor Organization. ISBN 978-2-87355-020-2.
  2. Koschack R., Rendtel J. (1990). Determination of spatial number density and mass index from visual meteor observations (II). WGN 18, 119-140.