Geminids 2008: visual data quicklook

Introduction

This page shows automated results of the Geminids 2008, 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 January 2 at 4:00 UT.

Note that strong disturbance of the Moon likely led to overestimated Geminid ZHRs in 2008.

Activity profile

ZHRmax = 139 based on 1470 Geminids in 225 data intervals, assuming fixed population index r = 2.0 and zenith correction 1/sin(hR).

ZHR graph

Time (UT)SolarlonnINTnGEMZHR
2008-12-06 08:09254.460213±2
2008-12-08 03:08256.279754±2
2008-12-09 12:24257.68741210±3
2008-12-10 04:47258.3806229±2
2008-12-10 23:54259.189114914±2
2008-12-12 23:08261.190146530±4
2008-12-13 03:12261.362136256±7
2008-12-13 09:48261.641136651±6
2008-12-13 20:00262.07486966±8
2008-12-13 21:22262.132487101±11
2008-12-13 22:03262.16126192113±8
2008-12-13 22:58262.2002921498±7
2008-12-13 23:56262.24125226113±8
2008-12-14 01:02262.2871697111±11
2008-12-14 02:00262.32813115139±13
2008-12-14 02:59262.36913106132±13
2008-12-14 06:08262.503166856±7
2008-12-14 19:45263.08021336±10
2008-12-18 00:45266.344311±1

For each estimation interval: time is the middle of the interval, nINT is the number of observing periods and nGEM is the number of Geminids involved. ZHR = (1 + sum nGEM) / 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 = 192 based on 1232 Geminids in 157 data intervals, assuming fixed population index r = 2.0 and zenith correction 1/sin(hR).

ZHR graph

Time (UT)SolarlonnINTnGEMZHR
2008-12-13 18:25262.00754563±9
2008-12-13 19:46262.06454463±9
2008-12-13 20:44262.10556179±10
2008-12-13 21:31262.138354110±15
2008-12-13 21:48262.1501065107±13
2008-12-13 22:12262.16712100125±12
2008-12-13 22:33262.18210100105±10
2008-12-13 22:50262.19495894±12
2008-12-13 23:11262.20995093±13
2008-12-13 23:32262.2241187113±12
2008-12-13 23:50262.236895114±12
2008-12-14 00:07262.248648137±20
2008-12-14 00:30262.26464094±15
2008-12-14 00:54262.281743114±17
2008-12-14 01:17262.298740110±17
2008-12-14 01:43262.316642116±18
2008-12-14 02:13262.337660149±19
2008-12-14 02:33262.351448192±27
2008-12-14 02:54262.366541139±21
2008-12-14 03:23262.387740101±16
2008-12-14 04:29262.433114054±8
2008-12-14 16:13262.93053143±8

For each estimation interval: time is the middle of the interval, nINT is the number of observing periods and nGEM is the number of Geminids involved. ZHR = (1 + sum nGEM) / 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 40 observers in 17 countries. Thank you for your efforts!

Spatial distribution

Spatial distribution

Temporal distribution

Temporal distribution

Table of observers

ObserverCountryTeffnGEM
Salvador Aguirre Mexico 1.30h 3
Mina Alizadeh Iran 2.17h 41
Karl Antier France 1.00h 8
Sergey Belan Ukraine 1.10h 2
Sushrut Bhanushali India 3.00h 67
Anna Brylyakova Ukraine 1.10h 3
Sietse Dijkstra Netherlands 8.37h 206
Jaroslaw Dygos Poland 1.25h 27
Wei Ge China 1.00h 5
William Godley United States 1.25h 10
Oleg Gorlatenko Ukraine 1.10h 6
Wayne T. Hally United States 6.90h 43
Carl Johannink Netherlands 1.25h 32
Kshitija Kelkar India 1.50h 35
Jakub Koukal Czech Republic 21.75h 152
Jakub Koukal Czech Republic 4.00h 25
Sumedh Kulkarni India 3.00h 59
Marina Kychyzhyyeva Ukraine 1.10h 9
Peter Van Leuteren Netherlands 8.35h 255
Anna S. Levina Israel 1.34h 15
Minghui Liang China 2.64h 13
Jer Nan Lou Taiwan 1.05h 6
Qiang Ma China 2.00h 31
Koen Miskotte Netherlands 3.62h 117
Mohammad Nilforoushan Iran 1.00h 34
Daniel Van Os Netherlands 4.45h 183
Anna Pavlova Ukraine 1.10h 3
Ekaterina Prihod'ko Ukraine 1.10h 6
Tushar Purohit India 2.75h 58
Ella Ratz Israel 1.33h 10
Jurgen Rendtel Germany 1.50h 6
Ivan M. Sergey Belarus 2.73h 56
Alisa Shurova Ukraine 1.10h 2
Rafael Ruben Torregrosa Soler Spain 1.27h 4
Erwin Van Ballegoy Netherlands 1.33h 13
Michel Vandeputte Belgium 7.00h 61
Li Xue China 5.5h 43
Quanzhi Ye China 0.66h 9
Weizhou Zeng China 0.62h 14
Xiang Zhan China 2.29h 27

Data access

Create your own analysis!
Rate intervals:
gem2008_rate.csv (CSV-format).
Magnitude distributions: gem2008_magn.csv (CSV-format).