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Geminids 2009: visual data quicklook

Introduction

This page shows automated results of the Geminids 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 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 13-14 December in detail (NEW)
Immy Observer statistics
Immy Data access
Immy Credits and references

Page generated: 2010 April 19 at 18:20 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 = 120 based on 13530 Geminids reported in 1393 intervals, assuming population index r = 2.0

ZHR graph

Time (UTC)Solarlon nINT nGEM ZHR Number density
2009-12-06 21:30 254.763 2 2 4±2 6 / 109·km3
2009-12-08 07:47 256.213 5 10 7±2 11 / 109·km3
2009-12-09 03:10 257.034 4 11 6±2 10 / 109·km3
2009-12-10 09:37 258.322 6 14 7±2 11 / 109·km3
2009-12-11 13:05 259.485 17 18 8±2 13 / 109·km3
2009-12-12 15:21 260.598 70 255 23±1 37 / 109·km3
2009-12-12 23:32 260.945 40 260 72±4 115 / 109·km3
2009-12-13 01:45 261.039 19 258 80±5 127 / 109·km3
2009-12-13 02:39 261.077 33 340 66±4 105 / 109·km3
2009-12-13 04:09 261.141 33 257 67±4 107 / 109·km3
2009-12-13 09:20 261.360 38 261 65±4 104 / 109·km3
2009-12-13 16:23 261.659 23 259 120±7 191 / 109·km3
2009-12-13 17:47 261.718 34 360 103±5 164 / 109·km3
2009-12-13 18:49 261.762 29 292 107±6 170 / 109·km3
2009-12-13 19:42 261.800 85 620 105±4 167 / 109·km3
2009-12-13 20:43 261.843 69 571 91±4 145 / 109·km3
2009-12-13 21:45 261.886 77 833 106±4 169 / 109·km3
2009-12-13 22:43 261.928 66 717 104±4 166 / 109·km3
2009-12-13 23:44 261.971 65 824 106±4 169 / 109·km3
2009-12-14 00:44 262.013 75 1117 113±3 180 / 109·km3
2009-12-14 01:40 262.052 67 1033 115±4 183 / 109·km3
2009-12-14 02:43 262.097 43 674 108±4 172 / 109·km3
2009-12-14 03:46 262.142 41 561 108±5 172 / 109·km3
2009-12-14 04:44 262.183 50 714 104±4 166 / 109·km3
2009-12-14 05:43 262.224 49 531 98±4 156 / 109·km3
2009-12-14 06:45 262.268 33 261 91±6 145 / 109·km3
2009-12-14 08:08 262.327 21 257 90±6 143 / 109·km3
2009-12-14 09:06 262.368 18 256 92±6 147 / 109·km3
2009-12-14 10:50 262.441 19 258 89±6 142 / 109·km3
2009-12-14 15:52 262.655 23 250 100±6 159 / 109·km3
2009-12-14 19:02 262.789 28 259 96±6 153 / 109·km3
2009-12-14 21:12 262.881 30 251 60±4 96 / 109·km3
2009-12-14 22:51 262.950 37 257 31±2 49 / 109·km3
2009-12-15 00:10 263.006 42 250 25±2 40 / 109·km3
2009-12-15 02:22 263.100 28 267 35±2 56 / 109·km3
2009-12-15 17:45 263.752 64 165 16±1 25 / 109·km3
2009-12-16 06:07 264.276 1 3 10±5 16 / 109·km3
2009-12-20 17:46 268.843 8 4 1±0 2 / 109·km3
2009-12-21 18:07 269.876 1 0 30±30 48 / 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:

13-14 December in detail

ZHR graph

Time (UTC)Solarlon nINT nGEM ZHR Number density
2009-12-13 00:24 260.982 12 149 83±7 132 / 109·km3
2009-12-13 01:26 261.026 9 144 82±7 131 / 109·km3
2009-12-13 02:06 261.054 14 157 78±6 124 / 109·km3
2009-12-13 02:29 261.070 16 143 66±6 105 / 109·km3
2009-12-13 02:57 261.090 13 146 64±5 102 / 109·km3
2009-12-13 03:41 261.121 19 140 69±6 110 / 109·km3
2009-12-13 04:50 261.169 19 149 62±5 99 / 109·km3
2009-12-13 07:33 261.284 24 148 57±5 91 / 109·km3
2009-12-13 15:29 261.621 16 151 105±9 167 / 109·km3
2009-12-13 16:26 261.661 14 141 119±10 190 / 109·km3
2009-12-13 17:19 261.699 11 145 108±9 172 / 109·km3
2009-12-13 17:46 261.717 19 169 106±8 169 / 109·km3
2009-12-13 18:07 261.733 14 153 101±8 161 / 109·km3
2009-12-13 18:37 261.754 14 140 109±9 174 / 109·km3
2009-12-13 19:06 261.774 15 141 113±9 180 / 109·km3
2009-12-13 19:23 261.787 28 184 95±7 151 / 109·km3
2009-12-13 19:43 261.801 31 244 107±7 170 / 109·km3
2009-12-13 20:03 261.814 25 178 111±8 177 / 109·km3
2009-12-13 20:23 261.828 24 164 88±7 140 / 109·km3
2009-12-13 20:43 261.843 22 157 77±6 123 / 109·km3
2009-12-13 21:04 261.858 23 250 107±7 170 / 109·km3
2009-12-13 21:24 261.872 22 244 99±6 158 / 109·km3
2009-12-13 21:43 261.885 29 309 113±6 180 / 109·km3
2009-12-13 22:04 261.900 26 280 104±6 166 / 109·km3
2009-12-13 22:23 261.913 23 235 99±6 158 / 109·km3
2009-12-13 22:42 261.927 18 191 101±7 161 / 109·km3
2009-12-13 23:03 261.942 25 291 112±7 178 / 109·km3
2009-12-13 23:25 261.957 21 272 104±6 166 / 109·km3
2009-12-13 23:43 261.970 20 279 117±7 186 / 109·km3
2009-12-14 00:02 261.983 24 273 100±6 159 / 109·km3
2009-12-14 00:24 261.999 26 406 99±5 158 / 109·km3
2009-12-14 00:45 262.013 23 338 113±6 180 / 109·km3
2009-12-14 01:05 262.028 26 373 133±7 212 / 109·km3
2009-12-14 01:23 262.040 29 468 123±6 196 / 109·km3
2009-12-14 01:43 262.054 20 268 112±7 178 / 109·km3
2009-12-14 02:04 262.070 18 297 106±6 169 / 109·km3
2009-12-14 02:23 262.083 13 241 139±9 221 / 109·km3
2009-12-14 02:44 262.097 18 264 99±6 158 / 109·km3
2009-12-14 03:04 262.112 12 169 95±7 151 / 109·km3
2009-12-14 03:26 262.127 15 150 82±7 131 / 109·km3
2009-12-14 03:50 262.144 14 208 118±8 188 / 109·km3
2009-12-14 04:08 262.157 15 241 122±8 194 / 109·km3
2009-12-14 04:28 262.171 17 231 95±6 151 / 109·km3
2009-12-14 04:48 262.185 16 271 114±7 182 / 109·km3
2009-12-14 05:08 262.199 17 206 105±7 167 / 109·km3
2009-12-14 05:28 262.214 19 209 85±6 135 / 109·km3
2009-12-14 05:49 262.228 16 222 125±8 199 / 109·km3
2009-12-14 06:11 262.244 19 141 84±7 134 / 109·km3
2009-12-14 06:45 262.268 21 144 88±7 140 / 109·km3
2009-12-14 07:36 262.304 14 149 86±7 137 / 109·km3
2009-12-14 08:22 262.336 10 148 95±8 151 / 109·km3
2009-12-14 08:50 262.356 10 159 103±8 164 / 109·km3
2009-12-14 09:20 262.378 11 141 86±7 137 / 109·km3
2009-12-14 10:05 262.409 11 146 81±7 129 / 109·km3
2009-12-14 12:21 262.505 11 140 108±9 172 / 109·km3
2009-12-14 15:32 262.640 12 146 92±8 147 / 109·km3
2009-12-14 17:29 262.723 19 140 103±9 164 / 109·km3
2009-12-14 19:18 262.800 14 140 121±10 193 / 109·km3
2009-12-14 20:14 262.840 12 147 87±7 139 / 109·km3
2009-12-14 21:20 262.887 17 142 54±5 86 / 109·km3
2009-12-14 22:28 262.934 26 141 28±2 45 / 109·km3
2009-12-14 23:13 262.966 17 140 33±3 53 / 109·km3
2009-12-14 23:46 262.989 17 120 29±3 46 / 109·km3

Observer statistics

Data has been received from 97 observers in 26 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

ObserverCountryTeffnGEM
Salvador Aguirre Mexico 12.25h 294
Alexandre Amorim Brazil 7.64h 72
Ankit Anand India 3.56h 87
Jure Atanackov Slovenia 4.80h 376
Sachin Bahmba India 2.45h 243
Ricardas Balciunas Lithuania 3.75h 63
Rafael G. Barrios B. Venezuela 4.50h 283
Felix Bettonvil Netherlands 1.59h 107
Gennadij Bugarevych Belarus 6.58h 266
Jose Carlos Millan Spain 1.79h 52
Simiao Cheng China 1.52h 15
Sherry Chhabra India 5.40h 104
Akhil Chopra India 2.25h 162
Tom Corstjens Belgium 2.70h 56
Orley Cruz Cuba 2.79h 137
Mayuresh Desai India 2.00h 68
Peter Detterline United States 3.88h 50
Karel Dewaele Belgium 1.69h 121
Suraj Dhiwar India 4.51h 79
Sietse Dijkstra Netherlands 13.25h 471
Onkar Dixit India 1.93h 112
Shulamit Dror Israel 1.78h 201
Sergey Dobrowsky Belarus 1.00h 6
Shlomi Eini Israel 5.38h 402
Craig Ewing United States 3.80h 172
Mario Fernández Palos Spain 1.23h 30
Christoph Gerber Germany 1.75h 54
Wei Ge China 5.00h 164
William Godley United States 3.33h 22
Jesus Guerrero Venezuela 4.50h 106
Shy Halatzi Israel 2.50h 273
Wayne T. Hally United States 4.20h 37
Vilem Heblik Czech Republic 1.25h 5
Ken Hodonsky United States 2.69h 170
Nick Horn United States 1.00h 25
Petr Horalek Czech Republic 1.32h 22
Lars Jacobs Belgium 1.44h 48
Jeremy Jefferis United States 0.25h 1
Carl Johannink Netherlands 1.98h 70
Javor Kac Slovenia 10.15h 309
Shantanu Karlekar India 2.77h 31
Roy Keeris Netherlands 11.72h 518
Lance Kelly Australia 5.00h 20
Lance Kelly Australia 0.50h 1
Roman Kostenko Ukraine 0.92h 19
Jakub Koukal Czech Republic 25.33h 933
Ashish Kumbhar India 2.72h 23
Adrian Lelyen Cuba 2.88h 84
Peter Van Leuteren Netherlands 15.08h 792
Anna S. Levina Israel 11.47h 733
Mike Linnolt United States 1.60h 13
Xin Li China 1.00h 41
Yuanjing Li China 1.41h 18
Jer Nan Lou Taiwan 0.20h 8
Qiang Ma China 1.33h 65
Adam Marsh Australia 18.98h 190
Mikhail Maslov Russia 3.75h 57
Bruce Mccurdy Canada 4.00h 116
Marco Micheli Italy 2.63h 45
Eugene Miller United States 0.72h 6
Koen Miskotte Netherlands 14.45h 943
Sirko Molau Germany 1.70h 25
Tohar Mor Israel 2.32h 107
Sargam Mulay India 5.39h 72
Francisco Ocana Gonzalez Spain 1.45h 47
Daniel Van Os Netherlands 0.50h 22
Rishikesh Pandit India 0.66h 27
Shyamal Patel India 1.00h 12
Justin Pierce United States 1.00h 3
Andrew Pignoli United States 1.17h 4
Rok Pucer Slovenia 1.85h 21
Ella Ratz Israel 5.60h 269
Jurgen Rendtel Germany 11.48h 56
Alex Scholten unknown 2.85h 89
Sanket Sen India 5.15h 88
Rohan Shewale India 2.00h 46
Phil Snelling Australia 2.5h 6
Sueli Sousa Sepetiba Brazil 1.85h 13
Sergey Stariy Ukraine 0.64h 6
Con Stoitsis Australia 2.00h 19
Wesley Stone United States 2.93h 176
Richard Taibi United States 4.33h 44
Rafael Ruben Torregrosa Soler Spain 0.50h 2
Shigeo Uchiyama Japan 3.67h 138
Daniel Van Os Netherlands 1.50h 12
Hendrik Vandenbruaene Belgium 5.34h 277
Michel Vandeputte Belgium 16.11h 1203
Daniel Verde Van Ouytsel Spain 0.58h 21
Daniel Verde Van Ouytsel Spain 2.30h 19
Jan Verfl Czech Republic 1.87h 175
Anahí Villalba Pradas Spain 1.45h 27
Bin Wang China 0.52h 23
Liyang Wang China 2.32h 51
William Watson United States 2.64h 112
Thomas Weiland Austria 3.59h 97
Xijun Wu China 4.36h 138
Oleg Yavorsky Russia 2.54h 121
Kai Yu China 0.64h 3
Weizhou Zeng China 8.49h 396
Xiang Zhan China 3.13h 164

Data access

Create your own analysis. The files below can be opened using Excel:
gem2009_rate.csv (number of meteors per interval per observer)
gem2009_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 the Urania Public Observatory in Belgium and Armagh Observatory in Northern Ireland.

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.