2010 Geminids - radio results

2009 Geminids - radio results

2008 Geminids - radio results

The following provisional information is based on a sample of results taken from the contents of Radio Meteor Observatories On Line.

Radio Geminids 2008 Peak Time (UT)

Radio Geminids 2008 Peak Solar Longitude (J2000)

Enric Fraile Algeciras (Spain)

Data

Analysis

T_max = 2008 December 13, 14:31 UT + 0.7 h

Width a = 47.9 + 1.8 h

Width b = 21.8 + 1.4 h

Peak solar longitude (J2000) = 261.84° + 0.03°

Willy Camps (Belgium)

Data

Analysis

T_max = 2008 December 13, 14:30 UT + 1.2 h

Width a = 37.4 + 3.2 h

Width b = 16.1 + 1.7 h

Peak solar longitude (J2000) = 261.84° + 0.05°

David Entwistle (UK)

Data

Analysis

T_max = 2008 December 13, 15:35 UT + 0.4 h

Width a = 11.5 + 0.4 h

Width b = 11.5 + 0.4 h

Peak solar longitude (J2000) = 261.89° + 0.02°

Alfred Krohmal (Russian Federation)

Data

Analysis

T_max = 2008 December 13, 18:35 UT + 0.6 h

Width a = 29.2 + 1.2 h

Width b = 20.2 + 1.3 h

Peak solar longitude (J2000) = 262.02° + 0.03°

Edward Majden (Canada)

Data

Analysis

T_max = 2008 December 14, 00:10 UT + 1.1 h

Width a = 81.5 + 5.7 h

Width b = 19.6 + 2.7 h

Peak solar longitude (J2000) = 262.25° + 0.05°

Andy Smith (UK)

Data

Analysis

T_max = 2008 December 13, 16:06 UT + 0.6 h

Width a = 31.2 + 1.7 h

Width b = 18.8 + 1.0 h

Peak solar longitude (J2000) = 261.91° + 0.03°

Dave Swan (UK)

Data

Analysis

T_max = 2008 December 13, 13:08 UT + 0.7 h

Width a = 28.3 + 1.9 h

Width b = 21.8 + 1.4 h

Peak solar longitude (J2000) = 261.97° + 0.03°

Felix Verbelen (Belgium)

Data

Analysis

T_max = 2008 December 13, 18:07 UT + 2.4 h

Width a = 19.3 + 3.2 h

Width b = 11.5 + 1.3 h

Peak solar longitude (J2000) = 262.0° + 0.10°

2007 Geminids - radio results

The following information is based on a sample of results taken from the contents of Meteor Observation Bulletin No.173.

Radio Geminids 2007 Peak Time (UT)

Radio Geminids 2007 Peak Solar Longitude (J2000)

Willy Camps (Belgium)

Data

Analysis

T_max = 2007 December 14, 16:57 UT +1.3 h, width a = 67.2, b = 7.2

Peak solar longitude (J2000) = 262.21° + 0.06°

Cosmos Observatory (The Netherlands)

Data

Analysis

T_max = 2007 December 14, 12:30 UT +3.3 h, width a = 112.4, b = 21.8

Peak solar longitude (J2000) = 262.02° + 0.14°

Gaspard DeWilde (Belgium)

Data

Analysis

T_max = 2007 December 14, 14:39 UT +1.3 h, width a = 51.7, b = 13.4

Peak solar longitude (J2000) = 262.11° + 0.06°

David Entwistle (England)

Data

Analysis

T_max = 2007 December 14, 18:07 UT +2.1 h, width a = 98.8, b = 16.5

Peak solar longitude (J2000) = 262.26° + 0.09°

Dave Swan (England)

Data

Analysis

T_max = 2007 December 14, 14:47 UT , width a = 71.2, b = 18.6

Peak solar longitude (J2000) = 262.12° + 0.06°

Felix Verbelen (Belgium)

Data

Analysis

T_max = 2007 December 14, 16:55 UT , width a = 27.0, b = 8.5

Peak solar longitude (J2000) = 262.21° + 0.06°

2006 Geminids - Radio results

The following information is based on a small sample of results taken from the contents of Meteor Observation Bulletin No.161. 

Radio Geminids 2006 Peak Time (UT)

Radio Geminids 2006 Peak Solar Longitude (J2000)

Gaspard DeWilde (Belgium)

Data

Analysis

T_max = 2006 December 14, 11:36 UT +1.6 h , width a = 33, b = 10

Peak solar longitude (J2000) = 262.237° + 0.067°

Andy Smith (England)

Data

Analysis

T_max = 2006 December 14, 16:13 UT +1.5 h , width a = 77, b = 13

Peak solar longitude (J2000) = 262.433° + 0.062°

Felix Verbelen (Belgium)

Data

Analysis

T_max = 2006 December 14, 14:58 UT +6 h, width a = 33, b = 7.

Peak solar longitude (J2000) = 262.380° + 0.247°

2005 Geminids - Radio results

The following information is based on a small sample of results taken from the contents of Meteor Observation Bulletin No.149 and the Radio Meteor Observation in Japan bulletin No. 050.

Enric Algeciras (Spain)

Data

Analysis

T_max = 2005 December 14, 00:30 UT +?.? h , width a = 58, b = 24

Peak solar longitude (J2000) = ???.???° + ?.???7°

Towada Technical High School (Japan)

Data

Analysis

T_max = 2005 December 13, 17:19 UT +?.? h , width a = 37, b = 13

Peak solar longitude (J2000) = ???.???° + ?.???7°

Felix Verbelen (Belgium)

Data

Analysis

T_max = 2005 December 14, 09:30 UT +?.? h , width a = 26, b = 4

Peak solar longitude (J2000) = ???.???° + ?.???7°

2002

If we look at the hourly rates for the 13th and 14th of December 2002, we see two peaks each day. This is a characteristic of the radio detection system and is caused by the shower's radiant being presented at the most favourable position above the observer's horizon to reflect signals.

Acknowledgements

I am grateful to the following persons for their efforts in recording meteor counts: Enric Fraile Algeciras (Spain), Orlando Benitez Sanchez (Gran Canaria), Michael Boschat (Canada), Jeff Brower (Canada), Cosmos Observatory & F J W Kooiman (The Netherlands), Gaspard De Wilde (Belgium), David Entwistle (England), Pierre De Groote (Belgium), Patrice Guerin (France), Peter Knol (The Netherlands), Stan Nelson (USA), Sadao Okamoto (Japan), Valter Gennoro (Italy), Mike Otte (USA), Andy Smith (England), Dave Swan (England), Istvan Tepliczky (Hungary), Felix Verbelen (Belgium). I'm especially grateful to Christian Steyaert for his efforts in collecting, collating and distributing the rmobs data and to Pierre Terrier for his work in supporting this effort.

References

* 'A numerical method to aid in the combined determination of stream activity and Observability Function', by Christian Steyaert, Jeffrey Brower, and Felix Verbelen. Taken from WGN, the Journal of the IMO 34:3 (2006).