Quadrantids 2009: visual data quicklook

Introduction

This page shows automated results of the Quadrantids 2009, based on visual data entered through the IMO electronic report form. Note that these automated results may not be suitable for scientific use; please refer to manual analysis results published in journal papers (e.g., WGN) when available. Send your feedback regarding this page to Geert Barentsen.

Immy Activity profile
Immy Peak profile in detail
Immy Observer statistics
Immy Data access

Page generated: 2009 April 18 at 16:45 UT.

Activity profile

ZHRmax = 146 based on 4676 Quadrantids in 586 data intervals, assuming fixed population index r = 2.1 and zenith correction 1/sin(hR).

ZHR graph

Time (UT)SolarlonnINTnQUAZHR
2008-12-28 06:07276.7592981±0
2008-12-29 08:18277.87217102±1
2008-12-30 03:39278.6941891±0
2008-12-31 07:40279.88419153±1
2009-01-02 00:10281.60462315±3
2009-01-02 21:31282.511153024±4
2009-01-02 23:49282.608187733±4
2009-01-03 00:54282.6553217042±3
2009-01-03 01:57282.6994629648±3
2009-01-03 02:55282.7407765663±2
2009-01-03 03:57282.7846474579±3
2009-01-03 04:51282.82261830100±3
2009-01-03 05:42282.85915210105±7
2009-01-03 09:04283.00214133124±11
2009-01-03 10:06283.04534356138±7
2009-01-03 11:01283.08516195141±10
2009-01-03 12:05283.13020272128±8
2009-01-03 13:02283.17021268146±9
2009-01-03 13:56283.2089118116±11
2009-01-03 17:19283.352652113±16
2009-01-03 18:20283.39574166±10
2009-01-03 19:25283.44176191±12
2009-01-03 21:37283.535113663±10
2009-01-04 00:50283.67153726±4
2009-01-04 04:52283.84314245±1
2009-01-05 10:16285.091546±3

For each estimation interval: time is the middle of the interval, nINT is the number of observing periods and nQUA is the number of Quadrantids involved. ZHR = (1 + sum nQUA) / sum(Teff/C) where Teff is the effective observing time and C is the total correction for limiting magnitude, clouds and zenith correction. The solar longitudes refer to equinox J2000.0.

Peak profile in detail

ZHRmax = 161 based on 4454 Quadrantids in 444 data intervals, assuming fixed population index r = 2.1 and zenith correction 1/sin(hR).

ZHR graph

Time (UT)SolarlonnINTnQUAZHR
2009-01-03 00:20282.63084440±6
2009-01-03 00:40282.64584251±8
2009-01-03 00:55282.65684442±6
2009-01-03 01:08282.66594444±7
2009-01-03 01:28282.67994243±7
2009-01-03 01:42282.68896249±6
2009-01-03 01:58282.7001610352±5
2009-01-03 02:13282.711117746±5
2009-01-03 02:28282.7211813660±5
2009-01-03 02:42282.7311714558±5
2009-01-03 02:57282.7421916967±5
2009-01-03 03:11282.7521814259±5
2009-01-03 03:25282.7621716870±5
2009-01-03 03:41282.7731515280±6
2009-01-03 03:56282.7841720075±5
2009-01-03 04:13282.7951617777±6
2009-01-03 04:27282.8052227395±6
2009-01-03 04:41282.81518254101±6
2009-01-03 04:55282.8251215495±8
2009-01-03 05:12282.83712202114±8
2009-01-03 05:27282.84810146105±9
2009-01-03 05:41282.858683114±12
2009-01-03 05:56282.868463105±13
2009-01-03 08:47282.989548104±15
2009-01-03 09:09283.005652154±21
2009-01-03 09:29283.019553131±18
2009-01-03 09:44283.030665137±17
2009-01-03 09:58283.040869118±14
2009-01-03 10:15283.05111146157±13
2009-01-03 10:31283.063976147±17
2009-01-03 10:49283.076680142±16
2009-01-03 11:06283.088352150±21
2009-01-03 11:23283.100543122±18
2009-01-03 11:43283.114573104±12
2009-01-03 11:58283.125572154±18
2009-01-03 12:14283.136686127±14
2009-01-03 12:29283.146441161±25
2009-01-03 12:43283.157786143±15
2009-01-03 12:57283.166583158±17
2009-01-03 13:13283.178675159±18
2009-01-03 13:34283.192544108±16
2009-01-03 13:56283.208575108±12
2009-01-03 15:36283.279443136±21
2009-01-03 17:38283.365644111±17
2009-01-03 18:34283.40564475±11
2009-01-03 19:25283.44154278±12
2009-01-03 21:28283.528124065±10

For each estimation interval: time is the middle of the interval, nINT is the number of observing periods and nQUA is the number of Quadrantids involved. ZHR = (1 + sum nQUA) / sum(Teff/C) where Teff is the effective observing time and C is the total correction for limiting magnitude, clouds and zenith correction. The solar longitudes refer to equinox J2000.0.

Observer statistics

Data has been received from 61 observers in 21 countries. Thank you for your efforts!

Spatial distribution

Spatial distribution

Temporal distribution

Temporal distribution

Table of observers

ObserverCountryTeffnQUA
Salvador Aguirre Mexico 5.50h 197
Mina Alizadeh Iran 0.96h 4
Karl Antier France 1.10h 1
Rainer Arlt Germany 1.53h 98
Pierre Bader Germany 4.43h 107
János Bakos Hungary 2.00h 103
Stephen Bedingfield Canada 2.68h 119
José Cappelletto Venezuela 0.45h 7
Simiao Cheng China 2.36h 5
Andrew Clarke United Kingdom 1.75h 2
Tibor Csorgei Slovakia 2.00h 50
Peter Detterline United States 1.60h 21
Sietse Dijkstra Netherlands 3.39h 18
Dariusz Dorosz Poland 1.64h 73
Frank Enzlein Germany 4.33h 122
Balazs Fodor Hungary 2.00h 42
Stela Frencheva Bulgaria 1.75h 151
William Godley United States 1.25h 4
Mitja Govedic Slovenia 1.91h 9
Shy Halatzi Israel 3.84h 122
Wayne T. Hally United States 4.00h 81
Vilem Heblik Czech Republic 4.25h 57
Carl Hergenrother United States 1.53h 82
Ken Hodonsky United States 2.70h 86
Kamil Hornoch Czech Republic 3.51h 184
Antal Igaz Hungary 3.16h 123
Carl Johannink Netherlands 8.44h 172
Javor Kac Slovenia 3.81h 17
Al?b?ta Kadlecová Czech Republic 3.58h 62
Katsuyuki Kobayashi Japan 0.50h 5
Jakub Koukal Czech Republic 34.42h 268
Jens Lacorne France 1.82h 1
Marco Langbroek Netherlands 3.45h 323
Peter Van Leuteren Netherlands 6.26h 3
Anna S. Levina Israel 3.57h 115
Jer Nan Lou Taiwan 2.18h 7
Pierre Martin Canada 2.25h 197
Bruce Mccurdy Canada 3.52h 135
Mukul Mhaskey India 2.41h 20
Koen Miskotte Netherlands 4.36h 166
Sirko Molau Germany 1.03h 48
Thomas Rattei Germany 1.17h 61
Jurgen Rendtel Germany 13.38h 177
Anna Rieth Hungary 1.50h 18
Mikiya Sato Japan 0.42h 6
David Scanlan United Kingdom 2.75h 6
Alex Scholten Netherlands 0.93h 40
Hideki Seo Japan 0.50h 15
Andrzej Skoczewski Poland 1.00h 12
Ulrich Sperberg Germany 4.76h 51
Wesley Stone United States 2.63h 289
Agoston Szauer Hungary 2.00h 41
Richard Taibi United States 1.85h 79
István Tepliczky Hungary 1.50h 30
Kazumi Terakubo Japan 0.75h 15
Rushikesh Tilak India 1.00h 11
Vesa Tornqvist Finland 2.92h 96
Shigeo Uchiyama Japan 3.00h 85
Michel Vandeputte Belgium 12.17h 182
Jan Verfl Czech Republic 3.57h 68
E. Brett Waller United States 1.00h 65

Data access

Create your own analysis!
Rate intervals:
qua2009_rate.csv (CSV-format).
Magnitude distributions: qua2009_magn.csv (CSV-format).