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Lyrids - radio results

The mean Solar longitude of the Lyrid shower maximum activity, derived from the analysis of radio results, was as follows:

2007    32.351
2006    32.389

2007 Lyrids - Radio results

The following information is based on the contents of Meteor Observation Bulletin No.165. 

Although the analysis is not without its problems the results support a Lyrid peak, much as expected, between 2007 April 22 12:00 UT (31.890) and 2007 April 23 12:00 UT (32.865). There's a fair spread in the individual observer's results, but the consensus does not contradict the expected visual peak at 2007 April 22 22:30 UT (32.32). 

There also seems to be good evidence for a brief burst of brighter meteors, with longer trains. This was noted by Gaspard De Wilde, Willy Camps and Jeff Brower. This occurred during the hour between 2007 April 23 07:00 UT and 2007 April 23 08:00 UT. The peak of this brighter activity was centred on solar longitude 32.682

Radio Lyrid 2007 Peak Time (UT)

Radio Lyrid 2007 Peak Solar Longitude (J2000)

Enric Fraile Algeciras (Spain)

Data

Analysis

Tmax = 2007 April 22, 17:06 UT +6 h , width a = 14, b = 33

Peak solar longitude (J2000) = 32.095 + 0.252

David Entwistle (England)

Data

Analysis

 

Tmax = 2007 April 22, 21:45 UT +16 h , width a = 37, b = 39.

Peak solar longitude (J2000) = 32.284 + 0.673

Jean-Louis Rault (France)

Tmax = 2007 April 23, 00:22 UT +6 h , width a = 15, b = 28.

Peak solar longitude (J2000) = 32.391 + 0.256

Dave Swan (England)

Tmax = 2007 April 23, 03:33 UT + 4 h, width a = 9, b = 21.

Peak solar longitude (J2000) = 32.520 + 0.182

Felix Verbelen (Belgium)

Tmax = 2007 April 23,  02:09 UT + 5 h, width a = 10, b = 12.

Peak solar longitude (J2000) = 32.463 + 0.207

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), Willy Camps (Belgium), Maurice De Meyere (Belgium), Gaspard De Wilde (Belgium), David Entwistle (England), Pierre De Groote (Belgium), Patrice Guerin (France), Szabolcs Kiss (Hungary), Peter Knol (The Netherlands), Stan Nelson (USA), Sadao Okamoto (Japan), Mike Otte (USA), Jean-Louis Rault (France), 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).

2006 Lyrids - radio results

The following information is based on the contents of Meteor Observation Bulletin No.153.

Radio Lyrid 2006 Peak Time (UT)

Radio Lyrid 2006 Peak Solar Longitude (J2000)

Pierre De Groote (Belgium)

Manual width minimization.

Tmax = 2006 April 22, 12:51 UT +5h, width a = 9, b = 17.

Gaspard De Wilde (Belgium)

Tmax = 2006 April 22, 23:52 UT +12 h, width a = 23, b = 35.

David Entwistle (England)

Tmax = 2006 April 22, 06:24 UT +10h, width a = 22, b = 35.

Dave Swan (England)

Tmax = 2006 April 22, 21:28 UT +6 h, width a = 35, b = 16.

Felix Verbelen (Belgium)

Note: four hour's missing counts interpolated 2006 April 21, hours 9 to 12 inclusive.

Tmax = 2006 April 23, 02:39 UT +11 h, width a = 25, b = 17.

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), Maurice De Meyere (Belgium), Gaspard De Wilde (Belgium), David Entwistle (England), Pierre De Groote (Belgium), Patrice Guerin (France), Szabolcs Kiss (Hungary), Peter Knol (The Netherlands), Stan Nelson (USA), Sadao Okamoto (Japan), 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).