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Dátum: 2004-08-18 11:13:01
Feladó: Hevesi Zoltán
Tárgy: IMO Shower Circ.: 2004 Perseids
Perseida maximum kiértékelés az IMO -tól, benne a magyar észlelésekkel.

Egész jó kis 200 közeli ZHR jött ki.

HEV



> ==============================================
>    I M O     S H O W E R     C I R C U L A R
> ==============================================
>
>    The 2004 Perseids, 4th analysis
>
> A total of 16536 Perseids is now comprised by
> 1567 individual observing periods as used for
> the analysis given below. A short-lived peak
> of activity was observed at 20h56m UT +-4 min
> on August 11, 2004. The precise moment was
> derived from various samplings of the data
> into averages, so it is not directly visible
> in the activity table below.
>
> The time predicted by Esko Lyytinen was 20h54m,
> and it cannot be excluded that observers´ pre-
> judice has ´helped´ match this forecast. The
> study of meteor timings on video recordings
> may clarify this. Any difference is most likely
> below 10 minutes though.
>
> If we assume a background activity of 80-90 during
> the peak, we can derive the full width at half
> maximum (FWHM) to be about 55 minutes (20h25m -
> 21h20m).
>
> Enhanced Perseid ZHRs were observed during the
> entire nights Aug 11/12 and 12/13. This is also
> in line with Esko´s comment that "because Jupiter
> lowers the ecliptic crossing radii in general
> this year, there may be enhanced general activity
> as well."
>
> -------------------------------------------------------
> Date (UT)   Time  Solarlong   nINT   nPER    ZHR
> -------------------------------------------------------
> Aug 9.2490  05:59   136.928      6     36     27  +-  4
> Aug 11.054  01:18   138.659     20    228     34  +-  2
> Aug 11.404  09:42   138.995     19    236     41  +-  3
> Aug 11.726  17:25   139.304     26    193     68  +-  5
> Aug 11.788  18:55   139.364     36    159     63  +-  5
> Aug 11.824  19:47   139.398     45    240     85  +-  5
> Aug 11.844  20:15   139.418     38    281    106  +-  6
> Aug 11.852  20:27   139.425     34    274    161  +- 10
> Aug 11.862  20:41   139.435     54    486    174  +-  8
> Aug 11.865  20:46   139.438     51    412    176  +-  9
> Aug 11.871  20:54   139.444     54    437    187  +-  9
> Aug 11.877  21:03   139.449     72    665    185  +-  7
> Aug 11.884  21:13   139.456     64    431    147  +-  7
> Aug 11.891  21:23   139.463     66    490    134  +-  6
> Aug 11.899  21:35   139.470     72    574    119  +-  5
> Aug 11.909  21:49   139.480    104    581     94  +-  4
> Aug 11.927  22:15   139.497     91    724     99  +-  4
> Aug 11.949  22:47   139.518     87    640     82  +-  3
> Aug 11.969  23:15   139.538     80    759     93  +-  3
> Aug 11.991  23:47   139.559     59    690    105  +-  4
> Aug 12.012  00:17   139.579     52    656    109  +-  4
> Aug 12.032  00:46   139.598     59    763    125  +-  5
> Aug 12.052  01:15   139.617     65    904    134  +-  4
> Aug 12.073  01:45   139.637     46    671    127  +-  5
> Aug 12.099  02:23   139.662     31    524    148  +-  6
> Aug 12.163  03:55   139.724     37    465     98  +-  5
> Aug 12.249  05:59   139.806     19    366     89  +-  5
> Aug 12.319  07:39   139.874     29   1066    102  +-  3
> Aug 12.390  09:22   139.942     14    562    118  +-  5
> Aug 12.510  12:14   140.057     20    241    101  +-  6
> Aug 12.726  17:25   140.264     21    294    110  +-  6
> Aug 12.836  20:04   140.370     21    212     90  +-  6
> Aug 12.876  21:01   140.408     20    344     84  +-  5
> Aug 12.943  22:38   140.473     22    491     72  +-  3
> Aug 13.120  02:53   140.643     15    230     47  +-  3
> Aug 14.015  00:22   141.503     11    156     30  +-  2
> Aug 15.417  10:00   142.850      7     55     10  +-  1
> -------------------------------------------------------
> r = 2.0; solar longitudes refer to J2000.0
>
> If you have not yet submitted your observing report,
> it is still worth doing so as a final analysis will
> be done in early September.
>
> If you have submitted preliminary data, please send
> your final report also very soon. Note that a break-
> down into small observing periods (5-min around the
> peak) is appreciated. Magnitude distributions of
> the Perseids should also be broken down into small
> periods, because short-lived features in the mass
> distribution of Perseid particles may be detected.
>
> The current activity profile is based on the data
> by the following observers, to whom we are most
> grateful:
>
> Maxim Andreev (Russia)
> Rainer Arlt (Germany)
> Joseph D. Assmus (USA)
> Morteza Azizi (Iran)
> Roberto Bacci (Italy)
> Lukas Bolz (Germany)
> Michael Boschat (Canada)
> Dustin Brown (USA)
> Andreas Buchmann (Switzerland)
> Jens Th. Carlsen (Denmark)
> Gu Chan (China)
> Danijela Cuic (Serbia)
> Zolfaqar Daneshi (Iran)
> Luigi D´Argliano (Italy)
> Sietse Dijkstra (the Netherlands)
> Dariusz Dorosz (Poland)
> Audrius Dubietis (Lithuania)
> Garry Dymond (Canada)
> Shlomi Eini (Israel)
> Frank Enzlein (Germany)
> Li Feng (China)
> Marek Fretala (Poland)
> Martin Galea de Giovanni (Malta)
> George W. Gliba (USA)
> Roberto Gorelli (Italy)
> Daniel Grun (Germany)
> Laszlo Gyarmati (Hungary)
> Amir Hasanzadeh (Iran)
> Takema Hashimoto (Japan)
> Jan Hattenbach (Germany)
> Roberto Haver (Italy)
> Davood Hemati (Iran)
> Veli-Pekka Hentunen (Finland)
> Zoltan Hevesi (Hungary)
> Kamil Hornoch (Czech Republic)
> Yandong Hu (China)
> Kaca Jankovic (Serbia)
> Carl Johannink (the Netherlands)
> Wojciech Jonderko (Poland)
> Paul Jones (USA)
> Piotr Kedzierski (Poland)
> Roy Keeris (the Netherlands)
> Soheil Khoshbinfar (Iran)
> Andre Knofel (Germany)
> Lukasz Kowalski (Poland)
> Dovile Kraulaidiene (Lithuania)
> Ralf Kuschnik (Germany)
> Dominika Lacheta (Poland)
> Marco Langbroek (the Netherlands)
> Anna Lemiecha (Poland)
> Peter van Leuteren (the Netherlands)
> Anna Levina (Israel)
> Mike Linnolt (USA)
> Shangfei Liu (China)
> Robert Lunsford (USA)
> Vladimir Lukic (USA)
> Hartwig Luthen (Germany)
> Christophe Marlot (France)
> Pierre Martin (Canada)
> Antonio Martinez (Venezuela)
> Felix A. Martinez (USA)
> Mikhail Maslov (Russia)
> Bert G. Matous (USA)
> Alastair McBeath (UK)
> Bruce McCurdy (Canada)
> Huan Meng (China)
> Koen Miskotte (the Netherlands)
> Sirko Molau (Germany)
> Robert Morgan (USA)
> Thom Morgan (USA)
> Norman W. McLeod (USA)
> Arash Nabizadeh Haghighi (Iran)
> Sven Nather (Germany)
> Arkadiusz Olech (Poland)
> Daniel van Os (the Netherlands)
> Anna Palasz (Poland)
> Bruce Patterson (Canada)
> Cedric Peinado (France)
> Karolina Pyrek (Poland)
> Hamid Rakooy (Iran)
> Jose Afonso dos Reis Martins (Portugal)
> Jurgen Rendtel (Germany)
> Petra Rendtel (Germany)
> Antonio Sasanski (Macedonia)
> Branislav Savic (Serbia)
> Maziar Seyed-Nezhad (Iran)
> Andrzej Skoczewski (Poland)
> Izabela Spaleniak (Poland)
> David Stine (USA)
> Enrico Stomeo (Italy)
> Wesley Stone (USA)
> Boris Stromar (Croatia)
> Cristina Tinta-Vass (Romania)
> Marko Toivonen (Finland)
> Shigeo Uchiyama (Japan)
> Michel Vandeputte (Belgium)
> Wei Wang (China)
> William W. Watson (USA)
> Oliver Wusk (Germany)
> Jiaqing Yang (China)
> Joseph Zammit (Malta)
> Ewa Zegler (Poland)
> Xu Zhang (China)
> Hao Zheng (China)
> Wen Zhou (China)
> Jurga Zieniute (Lithuania)
> Vladimir Znojil (Czech Republic)
>
>
> The input is still going on; it is possible that
> your name will appear in a later phase of analysis.
>
>
>
> Rainer Arlt, 2004 August 18, 10h UT
> -----------------------------------
>
>
>
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