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Lyrids 2011: visual data quicklook

Introduction

This page shows automated results of the Lyrids 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 Peak in detail
Immy Observer statistics
Immy Data access
Immy Credits and references

Page generated: 2011 July 25 at 22:30 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 = 20 based on 951 Lyrids reported in 431 intervals, assuming population index r = 2.1

ZHR graph

Time (UTC)Solarlon nINT nLYR ZHR Particle density
2011-04-10 00:56 19.670 6 2 1±1 1 / 109·km3
2011-04-13 11:07 23.030 1 1 3±2 4 / 109·km3
2011-04-15 22:58 25.473 27 33 6±1 9 / 109·km3
2011-04-18 00:47 27.502 8 3 4±2 6 / 109·km3
2011-04-19 23:32 29.405 1 0 9±9 13 / 109·km3
2011-04-20 16:06 30.079 23 9 2±1 3 / 109·km3
2011-04-21 16:12 31.059 29 41 7±1 10 / 109·km3
2011-04-21 23:03 31.338 18 40 7±1 10 / 109·km3
2011-04-22 09:35 31.766 19 41 9±1 13 / 109·km3
2011-04-22 21:00 32.229 25 59 13±2 19 / 109·km3
2011-04-22 21:44 32.259 48 158 17±1 24 / 109·km3
2011-04-22 22:28 32.289 38 117 15±1 21 / 109·km3
2011-04-22 23:09 32.317 27 118 20±2 29 / 109·km3
2011-04-22 23:59 32.351 24 98 18±2 26 / 109·km3
2011-04-23 00:49 32.385 12 49 14±2 20 / 109·km3
2011-04-23 16:49 33.034 27 40 7±1 10 / 109·km3
2011-04-23 22:32 33.267 29 40 6±1 9 / 109·km3
2011-04-24 00:00 33.326 21 40 7±1 10 / 109·km3
2011-04-24 10:06 33.736 22 41 5±1 7 / 109·km3
2011-04-25 01:05 34.344 13 15 2±0 3 / 109·km3
2011-04-26 00:28 35.293 4 3 1±0 1 / 109·km3
2011-04-27 18:30 36.998 4 1 3±2 4 / 109·km3
2011-04-29 18:28 38.942 5 2 5±3 7 / 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:

Peak in detail

ZHR graph

Time (UTC)Solarlon nINT nLYR ZHR Particle density
2011-04-21 21:15 31.265 25 41 7±1 10 / 109·km3
2011-04-21 23:24 31.352 17 41 7±1 10 / 109·km3
2011-04-22 12:07 31.869 20 42 9±1 13 / 109·km3
2011-04-22 20:58 32.228 15 40 17±3 24 / 109·km3
2011-04-22 21:21 32.244 18 47 16±2 23 / 109·km3
2011-04-22 21:45 32.260 24 77 16±2 23 / 109·km3
2011-04-22 22:01 32.271 18 62 17±2 24 / 109·km3
2011-04-22 22:21 32.285 18 61 16±2 23 / 109·km3
2011-04-22 22:43 32.299 18 50 14±2 20 / 109·km3
2011-04-22 23:01 32.312 13 52 18±2 26 / 109·km3
2011-04-22 23:22 32.326 11 57 24±3 34 / 109·km3
2011-04-22 23:48 32.343 14 41 14±2 20 / 109·km3
2011-04-23 00:14 32.361 9 55 24±3 34 / 109·km3
2011-04-23 00:47 32.383 13 51 14±2 20 / 109·km3
2011-04-23 16:49 33.034 27 40 7±1 10 / 109·km3
2011-04-23 22:32 33.267 29 40 6±1 9 / 109·km3
2011-04-24 00:00 33.326 21 40 7±1 10 / 109·km3
2011-04-24 01:14 33.376 12 27 7±1 10 / 109·km3

Observer statistics

Data has been received from 70 observers in 22 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

ObserverCountryTeffnLYR
Anastasia Abdolvand Germany 6.31h 21
Tomasz Adam Poland 1.80h 16
Salvador Aguirre Mexico 2.00h 2
Rainer Arlt Germany 7.07h 27
Jure Atanackov Slovenia 4.05h 56
Pierre Bader Germany 9.00h 25
Kinga Bobrowska Poland 1.97h 3
Jens Briesemeister Germany 0.58h 6
Todor Dimitrov Bulgaria 2.66h 11
Dariusz Dorosz Poland 4.00h 21
Audrius Dubietis Lithuania 2.95h 6
Patryk Duchnowski Poland 1.97h 2
Urszula Dzikowicz Poland 1.97h 3
Frank Enzlein Germany 7.53h 38
Balazs Fodor Hungary 5.4h 40
Stela Frencheva Bulgaria 3.67h 16
Sylvie Gorkova Czech Republic 5.00h 8
Mitja Govedic Slovenia 2.57h 18
Lew Gramer United States 1.51h 8
Przemek Grabarczyk Poland 1.97h 2
Wayne T. Hally United States 1.00h 1
Kinga Jagielska Poland 1.97h 3
Milada Jakubecova Slovakia 3.47h 14
Paul Jones United States 1.50h 5
Paul Jones United States 1.00h 2
Javor Kac Slovenia 8.64h 54
Szabolcs Kiss Hungary 2.43h 9
Daria Kokoszka Poland 1.97h 2
Zdenek Komarek Slovakia 2.00h 9
Janusz W. Kosinski Poland 2.35h 28
Roman Kostenko Ukraine 3.81h 24
Jakub Koukal Czech Republic 25.50h 95
Roman Kovalyk Italy 10.55h 11
Patrycja Kr?zel Poland 1.97h 3
Jixia Lee China 1.89h 6
Peter Van Leuteren Netherlands 1.75h 3
Santosh Mahato India 5h 5
Alexandr Maidik Ukraine 12.10h 24
Qiang Ma China 3.25h 10
Adam Marsh Australia 4.04h 3
Pierre Martin Canada 0.98h 4
Paul Mei├čner Germany 5.53h 24
Vasilis Metallinos Greece 1.83h 13
Katarzyna Mielczarek Poland 1.97h 2
Magdalena Mi?ek Poland 1.97h 3
Koen Miskotte Netherlands 9.62h 6
Sirko Molau Germany 1.71h 4
Marian Mraz Slovakia 2.00h 4
Sven Nather Germany 14.84h 30
Karolina Paprocka Poland 0.98h 1
Dominika P?czek Poland 1.97h 1
Sasha Prokofyev Russia 1.00h 2
Jurgen Rendtel Germany 11.31h 48
Branislav Savic Serbia 6.15h 26
Christian Schmiel Germany 4.97h 31
Sergei Schmalz Germany 20.15h 16
Ivan M. Sergey Belarus 2.73h 14
Dariusz Sitek Poland 1.97h 3
Natalia Smus Poland 1.97h 3
Michal Stefancik Slovakia 2.00h 5
David Strachan United Kingdom 2.63h 0
Richard Taibi United States 2.62h 0
Csilla Tepliczky Hungary 5.39h 27
Istvan Tepliczky Hungary 0.52h 1
Michel Vandeputte Belgium 4.50h 30
Thomas Weiland Austria 11.79h 54
Adam Wroci?ski Poland 1.97h 2
Oliver Wusk Germany 2.27h 17
Weizhou Zeng China 0.50h 1
Bo Zhou China 2.00h 8

Data access

Create your own analysis. The files below can be opened using Excel:
lyr2011_rate.csv (number of meteors per interval per observer)
lyr2011_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.