Orionids 2009: visual data quicklook

Introduction

This page shows automated results of the Orionids 2009, 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 fully 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

Page generated: 2009 November 30 at 0:58 UTC.

Activity profile

ZHRmax = 45 based on 3688 reported Orionids, assuming population index r = 2.0.
ZHR (Zenithal Hourly Rate) is the number of meteors an observer would see under a dark sky with the radiant of the shower in zenith.

ZHR graph

Time (UTC)SolarlonnINTnORIZHR
2009-10-13 01:03199.7001011±11
2009-10-14 03:19200.78419244±1
2009-10-15 08:09201.9746103±1
2009-10-17 20:50204.483398911±1
2009-10-19 03:19205.745159816±2
2009-10-19 15:14206.239178621±2
2009-10-20 00:57206.6412621936±2
2009-10-20 03:14206.7362924637±2
2009-10-20 11:32207.079158825±3
2009-10-20 18:05207.3511011538±4
2009-10-20 22:30207.534148635±4
2009-10-21 00:54207.6334238036±2
2009-10-21 03:17207.7321112739±3
2009-10-21 08:16207.9392314127±2
2009-10-21 10:41208.0391915432±3
2009-10-21 14:41208.20588929±3
2009-10-21 17:56208.34069144±5
2009-10-21 21:37208.4921514734±3
2009-10-22 00:14208.6011917232±2
2009-10-22 03:08208.72178845±5
2009-10-22 08:11208.931178732±3
2009-10-22 11:13209.0561820038±3
2009-10-22 18:54209.374108637±4
2009-10-23 00:49209.6212728343±3
2009-10-23 11:38210.06989143±4
2009-10-24 02:28210.685208526±3
2009-10-24 23:42211.566119225±3
2009-10-25 03:34211.7272010418±2
2009-10-25 15:42212.230129120±2
2009-10-26 17:50213.317158913±1
2009-10-28 00:33214.594255±2
2009-10-30 15:34217.21642510±2

Time is the middle of the interval in Universal Time (UTC), Solarlon is the position of the earth relative to the sun (equinox J2000.0), nINT is the number of reported observing periods and nORI is the reported number of Orionids.
ZHR = (1 + sum nORI) / sum(Teff/C) where Teff is the effective observing time and C is the total correction for limiting magnitude, clouds and zenith correction 1/sin(hR).

Observer statistics

Data has been received from 63 observers in 23 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

ObserverCountryTeffnORI
Salvador Aguirre Mexico 17.06h 226
Plamena Alexandrova Bulgaria 6.73h 28
Jure Atanackov Slovenia 2.92h 138
Pierre Bader Germany 8.00h 87
Manca Behric Slovenia 2.44h 76
Yi Cao China 1.88h 28
Simiao Cheng China 3.66h 40
Filip Colakovic Serbia 0.83h 9
Paul Craft Australia 5.47h 56
Tibor Csorgei Slovakia 3.33h 48
Mark Davis United States 2.50h 36
Mayuresh Desai India 2.50h 33
Sietse Dijkstra Netherlands 6.18h 39
Todor Dimitrov Bulgaria 4.02h 64
Ling Feng China 3.00h 25
Christoph Gerber Germany 4.86h 20
William Godley United States 5.00h 25
Michal Goraus Poland 2.00h 16
Mitja Govedic Slovenia 2.06h 63
Wayne T. Hally United States 9.00h 75
Otto Hanyecz Hungary 1.22h 11
Vilem Heblik Czech Republic 5.33h 30
Carl Hergenrother United States 1.21h 20
Jeremy Jefferis United States 1.72h 6
Carl Johannink Netherlands 4.42h 31
Javor Kac Slovenia 9.42h 292
Lance Kelly Australia 2.00h 15
Jakub Koukal Czech Republic 21.52h 305
Peter Van Leuteren Netherlands 6.39h 15
Anna S. Levina Israel 2.25h 35
Mike Linnolt United States 2.10h 53
Yanzhe Liu United States 3.34h 51
Xin Li China 1.42h 39
Jer Nan Lou Taiwan 2.43h 26
Robert Lunsford United States 9.67h 250
Qiang Ma China 1.17h 12
Adam Marsh Australia 4.66h 37
Grigoris Maravelias Greece 6.13h 105
Pierre Martin Canada 1.63h 26
Mikhail Maslov Russia 1.90h 1
Koen Miskotte Netherlands 10.22h 99
Sirko Molau Germany 1.75h 33
Filip ?olakovi? Serbia 0.83h 9
Du?an Pavlovi? Serbia 0.66h 5
Rok Pucer Slovenia 4.94h 129
Ella Ratz Israel 1.33h 14
Jurgen Rendtel Germany 13.23h 146
Mikiya Sato Japan 3.33h 81
Tomoko Sato Japan 3h 83
Rohan Shewale India 2.50h 26
Tadeusz Sobczak Poland 1.00h 5
Ulrich Sperberg Germany 1.59h 15
Wesley Stone United States 1.67h 44
Pavel Svozil Czech Republic 0.50h 11
Richard Taibi United States 2.38h 11
Kazumi Terakubo Japan 1.50h 25
Michel Vandeputte Belgium 13.62h 64
Shigeo Uchiyama Japan 4.00h 51
Michel Vandeputte Belgium 8.13h 63
Valentin Velkov Bulgaria 7.02h 168
William Watson United States 5.75h 32
Thomas Weiland Austria 6.95h 76
Quanzhi Ye China 0.45h 5
Xiang Zhan China 0.82h 25

Data access

Create your own analysis!
Rate intervals:
ori2009_rate.csv (CSV-format).
Magnitude distributions: ori2009_magn.csv (CSV-format).

Credits

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 the Urania Public Observatory in Belgium.