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Perseids 2011: visual data quicklook

Introduction

This page shows automated results of the Perseids 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 11-13 August in detail (NEW)
Immy Observer statistics
Immy Data access
Immy Credits and references

Page generated: 2011 October 6 at 23:44 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 = 58 based on 6711 Perseids reported in 1510 intervals, assuming population index r = 2.0

ZHR graph

Time (UTC)Solarlon nINT nPER ZHR Particle density
2011-07-20 21:59 117.683 2 0 8±8 8 / 109·km3
2011-07-22 23:02 119.633 6 3 8±4 8 / 109·km3
2011-07-23 23:12 120.595 5 2 3±2 3 / 109·km3
2011-07-24 22:16 121.513 2 2 5±3 5 / 109·km3
2011-07-25 23:53 122.532 10 20 7±2 7 / 109·km3
2011-07-27 03:24 123.628 17 26 6±1 6 / 109·km3
2011-07-27 22:21 124.383 8 20 7±2 7 / 109·km3
2011-07-28 21:03 125.286 9 16 10±2 9 / 109·km3
2011-07-30 00:08 126.366 50 83 6±1 6 / 109·km3
2011-07-30 23:46 127.308 50 194 9±1 9 / 109·km3
2011-08-01 00:42 128.301 31 49 7±1 7 / 109·km3
2011-08-01 22:57 129.188 62 200 12±1 11 / 109·km3
2011-08-02 03:53 129.385 18 85 10±1 9 / 109·km3
2011-08-02 22:50 130.141 59 202 10±1 9 / 109·km3
2011-08-03 01:01 130.228 32 118 11±1 10 / 109·km3
2011-08-03 22:03 131.067 55 206 13±1 12 / 109·km3
2011-08-04 00:50 131.178 48 200 11±1 10 / 109·km3
2011-08-04 16:04 131.786 19 93 15±2 14 / 109·km3
2011-08-04 23:01 132.063 40 205 15±1 14 / 109·km3
2011-08-05 01:36 132.166 43 189 14±1 13 / 109·km3
2011-08-05 21:53 132.975 51 204 15±1 14 / 109·km3
2011-08-05 23:31 133.040 41 200 14±1 13 / 109·km3
2011-08-06 02:04 133.142 34 121 11±1 10 / 109·km3
2011-08-06 22:31 133.959 46 201 15±1 14 / 109·km3
2011-08-07 00:33 134.040 40 201 15±1 14 / 109·km3
2011-08-07 02:11 134.105 26 140 19±2 18 / 109·km3
2011-08-07 23:31 134.956 41 204 18±1 17 / 109·km3
2011-08-08 01:38 135.041 19 121 21±2 20 / 109·km3
2011-08-09 01:26 135.991 36 151 17±1 16 / 109·km3
2011-08-10 00:49 136.925 25 201 31±2 29 / 109·km3
2011-08-10 09:42 137.279 15 53 17±2 16 / 109·km3
2011-08-10 23:09 137.817 28 215 22±1 21 / 109·km3
2011-08-11 00:58 137.889 21 201 38±3 36 / 109·km3
2011-08-11 02:56 137.968 30 169 26±2 25 / 109·km3
2011-08-11 22:09 138.736 67 205 25±2 24 / 109·km3
2011-08-12 00:04 138.813 49 202 27±2 26 / 109·km3
2011-08-12 01:06 138.854 38 235 34±2 32 / 109·km3
2011-08-12 02:13 138.898 32 205 36±3 34 / 109·km3
2011-08-12 14:30 139.389 43 201 57±4 54 / 109·km3
2011-08-12 22:13 139.698 58 200 45±3 43 / 109·km3
2011-08-12 23:58 139.768 36 203 54±4 51 / 109·km3
2011-08-13 01:34 139.832 34 252 53±3 50 / 109·km3
2011-08-13 04:37 139.953 31 201 58±4 55 / 109·km3
2011-08-13 19:08 140.534 39 207 51±4 48 / 109·km3
2011-08-14 01:58 140.807 21 119 34±3 32 / 109·km3
2011-08-14 23:04 141.651 13 54 26±4 25 / 109·km3
2011-08-16 20:10 143.456 1 2 11±6 10 / 109·km3
2011-08-16 22:05 143.532 9 42 17±3 16 / 109·km3
2011-08-17 22:00 144.490 5 28 18±3 17 / 109·km3
2011-08-18 22:10 145.458 9 31 9±2 9 / 109·km3
2011-08-19 21:14 146.383 6 29 10±2 9 / 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:

11-13 August in detail

ZHR graph

Time (UTC)Solarlon nINT nPER ZHR Particle density
2011-08-11 20:45 138.680 5 17 32±8 30 / 109·km3
2011-08-11 21:23 138.705 11 45 28±4 26 / 109·km3
2011-08-11 21:51 138.724 14 40 32±5 30 / 109·km3
2011-08-11 22:19 138.742 18 42 21±3 20 / 109·km3
2011-08-11 22:58 138.768 15 49 25±4 24 / 109·km3
2011-08-11 23:26 138.787 13 40 22±3 21 / 109·km3
2011-08-11 23:50 138.803 10 43 38±6 36 / 109·km3
2011-08-12 00:07 138.815 13 41 17±3 16 / 109·km3
2011-08-12 00:19 138.823 7 40 37±6 35 / 109·km3
2011-08-12 00:36 138.834 11 53 31±4 29 / 109·km3
2011-08-12 00:50 138.843 14 94 37±4 35 / 109·km3
2011-08-12 01:06 138.854 10 55 32±4 30 / 109·km3
2011-08-12 01:21 138.864 9 49 30±4 28 / 109·km3
2011-08-12 01:37 138.874 6 41 34±5 32 / 109·km3
2011-08-12 01:52 138.885 11 77 40±5 38 / 109·km3
2011-08-12 02:08 138.895 7 54 35±5 33 / 109·km3
2011-08-12 02:25 138.906 7 45 38±6 36 / 109·km3
2011-08-12 03:09 138.936 6 29 33±6 31 / 109·km3
2011-08-12 05:05 139.013 1 8 44±15 42 / 109·km3
2011-08-12 06:57 139.088 9 34 30±5 28 / 109·km3
2011-08-12 08:27 139.148 5 31 47±8 44 / 109·km3
2011-08-12 17:04 139.492 1 3 48±24 45 / 109·km3
2011-08-12 17:47 139.521 10 40 93±15 88 / 109·km3
2011-08-12 19:11 139.576 8 43 108±16 102 / 109·km3
2011-08-12 20:15 139.619 10 43 64±10 60 / 109·km3
2011-08-12 21:26 139.666 12 41 52±8 49 / 109·km3
2011-08-12 22:08 139.694 19 45 41±6 39 / 109·km3
2011-08-12 22:32 139.710 10 47 45±6 43 / 109·km3
2011-08-12 22:50 139.722 9 42 51±8 48 / 109·km3
2011-08-12 23:11 139.736 10 49 82±12 77 / 109·km3
2011-08-12 23:35 139.752 11 40 41±6 39 / 109·km3
2011-08-12 23:54 139.765 7 42 64±10 60 / 109·km3
2011-08-13 00:14 139.779 5 42 80±12 76 / 109·km3
2011-08-13 00:36 139.793 8 43 41±6 39 / 109·km3
2011-08-13 01:09 139.815 6 44 63±9 60 / 109·km3
2011-08-13 01:22 139.824 12 90 50±5 47 / 109·km3
2011-08-13 01:41 139.836 9 70 63±7 60 / 109·km3
2011-08-13 01:57 139.847 8 52 41±6 39 / 109·km3
2011-08-13 02:17 139.860 9 83 62±7 59 / 109·km3
2011-08-13 02:34 139.872 6 43 60±9 57 / 109·km3
2011-08-13 03:01 139.890 3 3 25±12 24 / 109·km3
2011-08-13 05:02 139.970 1 14 70±18 66 / 109·km3
2011-08-13 06:30 140.029 6 12 77±21 73 / 109·km3
2011-08-13 08:52 140.123 5 43 56±8 53 / 109·km3
2011-08-13 10:08 140.174 7 47 81±12 77 / 109·km3
2011-08-13 11:26 140.226 4 21 48±10 45 / 109·km3
2011-08-13 18:30 140.508 2 17 116±27 110 / 109·km3
2011-08-13 20:26 140.586 6 28 64±12 60 / 109·km3
2011-08-13 22:10 140.656 10 42 49±7 46 / 109·km3
2011-08-13 23:21 140.703 10 41 30±5 28 / 109·km3
2011-08-14 00:32 140.750 5 40 43±7 41 / 109·km3
2011-08-14 01:15 140.779 9 44 29±4 27 / 109·km3
2011-08-14 02:04 140.811 6 36 42±7 40 / 109·km3
2011-08-14 07:35 141.032 2 13 34±9 32 / 109·km3

Observer statistics

Data has been received from 139 observers in 31 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

ObserverCountryTeffnPER
Ioan Agavriloaiei Romania 4.15h 59
Salvador Aguirre Mexico 0.25h 0
Mina Alizadah Iran 1.00h 2
Sima Alizadeh Iran 0.83h 1
Hamed Altafi Iran 1.00h 1
Rainer Arlt Germany 0.50h 0
Pierre Bader Germany 12.15h 85
Thierry Barrault France 1.32h 7
Ivana Belic Serbia 4.42h 41
Zora Beljic Yugoslavia 1.32h 3
Miroslav Blaho Slovakia 17.88h 169
Steven Brown United Kingdom 1.00h 4
Philippe Bury France 5.25h 8
Rafael Campillos Ladero Spain 5.71h 28
Matej Ciganj Croatia 3.30h 37
Daniel Cosovanu Romania 3.20h 8
Magdalena Cosovanu Romania 3.77h 26
Ilie Cosovanu Romania 1.73h 16
Anderson Dantas Brazil 6.97h 28
Natasja Delbar Belgium 3.87h 37
Jose Vicente Diaz Martinez Spain 0.92h 3
Olenici Dimitrie Romania 2.80h 21
Todor Dimitrov Bulgaria 11.24h 22
Balazs Fodor Hungary 1.97h 18
Stefan Fuks Serbia 29.74h 255
Adam Gaca Poland 1.52h 16
Christoph Gerber Germany 5.25h 8
Maria Gimova Slovakia 1.47h 16
William Godley United States 2.67h 19
Stevan Golubovic Serbia 8.08h 82
Sylvie Gorkova Czech Republic 20h 82
Mitja Govedic Slovenia 14.47h 150
Milan Gredelji Croatia 1.20h 9
Milan Gredelji Croatia 2.11h 16
Ludovic Grossard France 2.78h 3
Wayne T Hally United States 3.00h 22
Wayne T. Hally United States 5.67h 27
Vilem Heblik Czech Republic 3.65h 23
Serge Hemon France 1.89h 5
Barr Herrnstadt Israel 5.02h 9
Leo Holmberg Finland 2.97h 15
Dilyan Hristov Bulgaria 7.35h 11
Dominika Jackowska Poland 9.00h 31
Lars Jacobs Belgium 4.54h 52
Carl Johannink Netherlands 31.61h 28
Karoly Jonas Hungary 10.90h 63
Javor Kac Slovenia 29.06h 423
Jozef Karlik Slovakia 1.45h 6
Zdenek Komarek Slovakia 7.81h 47
Janez Kos Slovenia 8.08h 153
Andrija Kostic Serbia 29.66h 318
Milana Kostic Serbia 5.23h 39
Jakub Koukal Czech Republic 56h 502
Roman Kovalyk Italy 43.70h 149
Jan Lembregts Belgium 7.42h 53
Greet Lembregts Belgium 4.81h 37
Anna Levin Israel 3.25h 11
Anna S. Levina Israel 7.39h 39
Mike Linnolt United States 0.33h 2
Robert Lunsford United States 8.41h 41
Alexandr Maidik Ukraine 1.70h 32
Boris Maji? Serbia 2.57h 63
Boris Majic Serbia 9.01h 92
Pierre Martin Canada 24.75h 140
Mikhail Maslov Russia 4.86h 67
Marko Matijevic Yugoslavia 1.50h 15
Bruce Mccurdy Canada 4.25h 63
Samuel Michalansky Slovakia 1.55h 20
Vladislava Milic Yugoslavia 1.32h 17
An?elka Milovanovi? Serbia 1.33h 29
Barbara Milovanovi? Serbia 1.25h 15
Jakub Mirocha Poland 17.45h 58
Koen Miskotte Namibia 41.65h 27
Tohar Mor Israel 5.02h 15
Konstantin Morozov Belarus 5.98h 36
Maria Mraz Slovakia 3.32h 28
Marian Mraz Slovakia 4.49h 19
Maciej Myszkiewicz Poland 27.22h 147
Vitaly Nikolaev Russia 2.24h 52
Markku Nissinen Finland 1.10h 8
Dimitrie Olenici Romania 2.00h 19
Michal Palo Slovakia 4.49h 12
Ivana Papazyan Serbia 5.41h 57
Lovro Pavletic Croatia 2.20h 30
Aleksandar Pavlovic Serbia 4.91h 14
Francis Petit-coulaud France 4.51h 17
Patricija Pevec Slovenia 3.35h 24
Leonardo Pierobon Croatia 1.25h 8
Martin Pierre Canada 0.95h 14
Krzysztof Pieszczoch Poland 20.41h 72
Jelena Proki? Serbia 0.75h 6
Rok Pucer Slovenia 1.50h 12
Ella Ratz Israel 2.95h 8
Jurgen Rendtel Germany 22.39h 133
Bohus Rosko Slovakia 1.93h 24
Boris Rosko Slovakia 2.03h 33
Agnieszka Ruminska Poland 8.83h 36
Mikiya Sato Japan 0.50h 11
Branislav Savic Serbia 23.35h 276
Sergei Schmalz Germany 12.90h 27
Sandi Segota Croatia 1.25h 5
Ivan Sergey Belarus 2.38h 24
Ivan M. Sergey Belarus 11.73h 56
Anastasiya Simoshina Ukraine 0.22h 1
Urmas Sisask Estonia 4.00h 67
Marcin Skalski Poland 9.25h 70
Andrzej Skoczewski Poland 5.75h 58
Dasa Spaspjevic Serbia 13.80h 92
Sergey Stariy Ukraine 1.10h 18
Michal Stefancik Slovakia 3.70h 12
Anton Stipec Croatia 2.55h 22
Nikola Stojanovic Serbia 28.29h 262
Olivera Stojanovic Croatia 17.98h 142
Wesley Stone United States 5.45h 80
Martina Supak Croatia 4.48h 34
Hanjie Tan China 1.33h 3
Israel Tejera Falcón Spain 2.20h 12
Csilla Tepliczky Hungary 19.88h 147
Istvan Tepliczky Hungary 1.55h 20
Kazumi Terakubo Japan 0.50h 6
Miroslav Tirpák Slovakia 1.95h 30
Rafael Ruben Torregrosa Soler Spain 0.16h 1
Vanesa Ujcic Ozbolt Croatia 2.32h 22
Michel Vampouille France 0.49h 0
Wienie Van Der Oord Israel 12.91h 65
Peter Van Leuteren Netherlands 48.01h 32
Denis Vida Croatia 1.25h 6
Martin Vincencik Slovakia 1.47h 8
Marina Vlajnic Serbia 14.77h 180
Sabine Wächter Germany 1.16h 5
William Watson United States 20.15h 113
Xiaofan Wei China 1.70h 0
Oliver Wusk Germany 7.60h 55
Ilkka Yrjölä Finland 1.08h 10
Tjasa Zaletelj Slovenia 6.33h 66
Weizhou Zeng China 3.24h 27

Data access

Create your own analysis. The files below can be opened using Excel:
per2011_rate.csv (number of meteors per interval per observer)
per2011_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.