We present the report of 2001 Geminids visual data totaled by the Nippon Meteor Society.
Adopted data is personal observation, radiant height >10deg, limiting magnitude>4.5mag. and clouds <50%. However after twilight(4:50LT) data exclude limiting magnitude condition.
Zenithal hourly rate(ZHR), which are we visible meteors on the ideal condition, is calculated from reported data by using luminous index = 2.5 and radiant height correction = 1/sin(RP.H) that based on the method of International Meteor Organization(IMO).
<ZHR Err.> on the table is mean ZHR division by square root of total observers' number.
The Graphs of Geminids 2001
Graph of Daily result
Graph of Hourly result
|
| |||||||
| UT | JST | n | all | Time | HR | ZHR | Err. |
| 12 07d 18:00 | 12 08d 03:00 | 13 |
74
|
750
|
5.8
|
9.5
|
1.1
|
| 12 08d 18:00 | 12 09d 03:00 | 12 |
102
|
750
|
8.4
|
15.7
|
1.6
|
| 12 09d 18:00 | 12 10d 03:00 |
6
|
83
|
370
|
13.9
|
20.6
|
2.3
|
| 12 10d 18:00 | 12 11d 03:00 |
9
|
159
|
540
|
17.7
|
32.6
|
2.6
|
| 12 11d 18:00 | 12 12d 03:00 | 14 |
445
|
870
|
31.7
|
47.0
|
2.2
|
| 12 12d 18:00 | 12 13d 03:00 |
2
|
47
|
130
|
22.4
|
122.3
|
17.8
|
| 12 13d 18:00 | 12 14d 03:00 | 29 |
3277
|
1530
|
122.8
|
204.0
|
3.6
|
| 12 14d 18:00 | 12 15d 03:00 | 39 |
1673
|
1950
|
49.5
|
101.5
|
2.5
|
| 12 15d 18:00 | 12 16d 03:00 | 12 |
169
|
665
|
16.2
|
30.1
|
2.3
|
| 12 16d 18:00 | 12 17d 03:00 |
4
|
27
|
240
|
6.8
|
18.4
|
3.5
|
|
| |||||||
| UT | JST | n | all | Time | HR | ZHR | Err. |
|
| |||||||
| 12 10d 12:30 | 12 10d 21:30 | 1 | 8 | 60 | 8 | 26.0 | 9.2 |
| 12 10d 13:30 | 12 10d 22:30 | 2 | 10 | 120 | 5 | 14.1 | 4.5 |
| 12 10d 14:30 | 12 10d 23:30 | - | - | - | - | - | - |
| 12 10d 15:30 | 12 11d 00:30 | 1 | 27 | 60 | 27 | 37.0 | 7.1 |
| 12 10d 16:30 | 12 11d 01:30 | 1 | 29 | 60 | 29 | 36.6 | 6.8 |
| 12 10d 17:30 | 12 11d 02:30 | 1 | 22 | 60 | 22 | 34.5 | 7.3 |
| 12 10d 18:30 | 12 11d 03:30 | 1 | 21 | 60 | 21 | 32.5 | 7.1 |
| 12 10d 19:30 | 12 11d 04:30 | 1 | 19 | 60 | 19 | 37.1 | 8.5 |
| 12 10d 20:30 | 12 11d 05:30 | 1 | 23 | 60 | 23 | 61.7 | 12.9 |
|
| |||||||
| 12 11d 12:30 | 12 11d 21:30 | 1 | 11 | 30 | 11 | 29.0 | 8.7 |
| 12 11d 13:30 | 12 11d 22:30 | 3 | 39 | 210 | 12.4 | 23.0 | 3.7 |
| 12 11d 14:30 | 12 11d 23:30 | 2 | 62 | 120 | 31 | 43.8 | 5.6 |
| 12 11d 15:30 | 12 12d 00:30 | 2 | 69 | 120 | 34.5 | 45.5 | 5.5 |
| 12 11d 16:30 | 12 12d 01:30 | 1 | 34 | 60 | 34 | 58.6 | 10.0 |
| 12 11d 17:30 | 12 12d 02:30 | 2 | 82 | 120 | 41 | 57.2 | 6.3 |
| 12 11d 18:30 | 12 12d 03:30 | 1 | 47 | 60 | 47 | 48.1 | 7.0 |
| 12 11d 19:30 | 12 12d 04:30 | 1 | 63 | 60 | 63 | 69.3 | 8.7 |
| 12 11d 20:30 | 12 12d 05:30 | 1 | 38 | 60 | 38 | 90.5 | 14.7 |
|
| |||||||
| 12 12d 10:30 | 12 12d 19:30 | 1 | 15 | 70 | 13 | 131.0 | 33.8 |
| 12 12d 11:30 | 12 12d 20:30 | - | - | - | - | - | - |
| 12 12d 12:30 | 12 12d 21:30 | - | - | - | - | - | - |
| 12 12d 13:30 | 12 12d 22:30 | 1 | 32 | 60 | 32 | 114.0 | 20.2 |
| 12 12d 14:30 | 12 12d 23:30 | - | - | - | - | - | - |
| 12 12d 15:30 | 12 13d 00:30 | - | - | - | - | - | - |
| 12 12d 16:30 | 12 13d 01:30 | - | - | - | - | - | - |
| 12 12d 17:30 | 12 13d 02:30 | - | - | - | - | - | - |
| 12 12d 18:30 | 12 13d 03:30 | - | - | - | - | - | - |
| 12 12d 19:30 | 12 13d 04:30 | - | - | - | - | - | - |
| 12 12d 20:30 | 12 13d 05:30 | - | - | - | - | - | - |
|
| |||||||
| 12 13d 12:30 | 12 13d 21:30 | 1 | 93 | 60 | 93 | 154.0 | 16.0 |
| 12 13d 13:30 | 12 13d 22:30 | 2 | 135 | 90 | 71.5 | 98.4 | 8.5 |
| 12 13d 14:30 | 12 13d 23:30 | 2 | 224 | 120 | 112 | 163.4 | 10.9 |
| 12 13d 15:30 | 12 14d 00:30 | 2 | 274 | 120 | 137 | 154.8 | 9.4 |
| 12 13d 16:30 | 12 14d 01:30 | 5 | 483 | 240 | 108.2 | 187.5 | 8.5 |
| 12 13d 17:30 | 12 14d 02:30 | 6 | 610 | 315 | 110.5 | 207.6 | 8.4 |
| 12 13d 18:30 | 12 14d 03:30 | 5 | 653 | 285 | 134.4 | 220.9 | 8.6 |
| 12 13d 19:30 | 12 14d 04:30 | 4 | 525 | 210 | 142 | 247.1 | 10.8 |
| 12 13d 20:30 | 12 14d 05:30 | 2 | 280 | 90 | 192 | 327.1 | 19.5 |
|
| |||||||
| 12 14d 10:30 | 12 14d 19:30 | 1 | 25 | 60 | 25 | 170.6 | 34.1 |
| 12 14d 11:30 | 12 14d 20:30 | 1 | 33 | 60 | 33 | 136.9 | 23.8 |
| 12 14d 12:30 | 12 14d 21:30 | 3 | 81 | 155 | 30.2 | 107.2 | 11.9 |
| 12 14d 13:30 | 12 14d 22:30 | 4 | 178 | 205 | 50.1 | 117.4 | 8.8 |
| 12 14d 14:30 | 12 14d 23:30 | 6 | 246 | 295 | 48.8 | 102.9 | 6.6 |
| 12 14d 15:30 | 12 15d 00:30 | 7 | 299 | 335 | 50.6 | 99.3 | 5.7 |
| 12 14d 16:30 | 12 15d 01:30 | 7 | 279 | 350 | 45.4 | 75.9 | 4.5 |
| 12 14d 17:30 | 12 15d 02:30 | 5 | 232 | 240 | 56.2 | 105.5 | 6.9 |
| 12 14d 18:30 | 12 15d 03:30 | 3 | 167 | 150 | 59.3 | 86.5 | 6.7 |
| 12 14d 19:30 | 12 15d 04:30 | 1 | 81 | 60 | 81 | 97.9 | 10.9 |
| 12 14d 20:30 | 12 15d 05:30 | 1 | 52 | 40 | 78 | 130.9 | 18.2 |
|
| |||||||
| 12 15d 12:30 | 12 15d 21:30 | 2 | 25 | 90 | 17.5 | 54.0 | 10.8 |
| 12 15d 13:30 | 12 15d 22:30 | 2 | 25 | 120 | 13 | 32.2 | 6.4 |
| 12 15d 14:30 | 12 15d 23:30 | 1 | 5 | 60 | 5 | 12.7 | 5.7 |
| 12 15d 15:30 | 12 16d 00:30 | 3 | 37 | 170 | 13.9 | 25.0 | 4.1 |
| 12 15d 16:30 | 12 16d 01:30 | 3 | 57 | 190 | 18.1 | 21.4 | 2.8 |
| 12 15d 17:30 | 12 16d 02:30 | 1 | 19 | 35 | 33 | 36.3 | 8.3 |
| 12 15d 18:30 | 12 16d 03:30 | - | - | - | - | - | - |
| 12 15d 19:30 | 12 16d 04:30 | - | - | - | - | - | - |
| 12 15d 20:30 | 12 16d 05:30 | - | - | - | - | - | - |
Total Observing Time: 7,795 min. (=129.92h)
Total Observers: 6,056 meteors
Observers(15):
Shigeo UCHIYAMA, Kazuhiro OSADA, Hiroyuki KATO, Tetushi KARIYA, Koetu SATO, Tomoko SATO, Mikiya SATO Kazuhiro SUMIE, Syoichi TANAKA, Kazumi TERAKUBO, Takema HASHIMOTO, Kenichi FUSHIMI, Katuhiko MAMETA, Hidekatu MIZOGUCHI, Minoru MURAKI