Results of the IMO Video Meteor Network - June 2009
===================================================
June presented to the observers not only short nights, but often also poor
weather. The start o Summer wasn't really noticeable in many parts of Europe,
and our American observers suffered from unusually poor weather, too. So it
comes as no surprise, that just three cameras managed to observe in 20 nights
or more. That's a pity, because June has become the month with least data.
Still, thanks to the more than 3,000 meteors of 2009, the total number of
June meteors in the IMO Video Meteor Database has increased to 18,000. That's
about a quarter of the meteor number from the best month (October).
Furthermore, June marks finally the end of the spring meteor activity minimum.
According to the long-term statistics, the hourly meteor rate recorded by our
cameras increases from 2.4 on average in May to 3.0 in June. It will
further increase to 4.7 in July and finally reach the annual maximum of 7.2
meteors per hour thanks to the Perseids in August.
In the past few months, Juergen Rendtel and me have spend numerous hours on a
new analysis of the video meteor database. The results of this analysis based
on 450,000 will be presented soon in WGN. As the tables are not yet finalized,
we will come once more here to results from the last analysis in fall 2008.
Looking at the IMO shower list, there is no shower beside the June-Bootids,
anyway. These are only occasionally active and were not recognized as an
independent shower. Looking at radiant lists from individual solar longitudes,
they show up only sometimes. On the other hand, the N Apex is a remarkably
prominent sporadic source in June. The radiant can be tracked from June 18
till July 30, when it moves from Pegasus to Triangulum (figure 1). The
scatter of the radiant position is stronger than for a usual shower, which
should not surprise. After all, that's not a real meteor shower with a well
defined radiant, but only a diffuse radiation area.
Figure 1: Radiant position of the N Apex source in June/July obtained from
data of the IMO Video Meteor Database.
The high velocity of 68 km/s on average is typical for an Apex source. The
activity profile (figure 2) is relatively flat with a rate of four. Thus, the
N Apex source in June is clearly more active than some of the minor shower
in the IMO working list!
Figure 2: Long-term activity profile of the N Apex source in June/Juli.
1. Observers
============
Code Name Place Camera FOV LM Nights Time Meteors
--------------------------------------------------------------------------------
BENOR Benitez-S. Las Palmas TIMES5 (0.95/50) 10 dg 3 mag 8 28.9 h 47
BRIBE Brinkmann Herne HERMINE (0.8/6) 55 dg 3 mag 15 40.2 h 119
CASFL Castellani Monte Baldo BMH1 (0.8/6) 55 dg 3 mag 16 43.4 h 109
BMH2 (0.8/6) 55 dg 3 mag 16 39.8 h 79
CRIST Crivello Valbrevenna C3P8 (0.8/3.8) 80 dg 3 mag 18 65.6 h 186
STG38 (0.8/3.8) 80 dg 3 mag 1 4.1 h 14
ELTMA Eltri Venezia MET38 (0.8/3.8) 80 dg 3 mag 6 28.0 h 66
GONRU Goncalves Tomar TEMPLAR1 (0.8/6) 55 dg 3 mag 19 103.3 h 334
TEMPLAR2 (0.8/6) 55 dg 3 mag 21 77.8 h 171
GOVMI Govedic Sredisce ORION2 (0.8/8) 42 dg 4 mag 19 87.4 h 277
HERCA Hergenroth. Tucson SALSA (1.2/4) 80 dg 3 mag 22 72.6 h 97
SALSA2 (1.2/4) 80 dg 3 mag 18 64.5 h 93
HINWO Hinz Brannenburg AKM2 (0.85/25) 32 dg 6 mag 8 15.8 h 42
IGAAN Igaz Hodmezova. HUHOD (0.8/3.8) 80 dg 3 mag 14 64.9 h 104
JOBKL Jobse Oostkapelle BETSY2 (1.2/85) 25 dg 7 mag 11 39.2 h 167
KACJA Kac Kostanjevec METKA (0.8/8) 42 dg 4 mag 13 51.6 h 74
Ljubljana ORION1 (0.8/8) 42 dg 4 mag 20 55.0 h 85
Kamnik REZIKA (0.8/6) 55 dg 3 mag 9 33.3 h 94
STEFKA (0.8/3.8) 80 dg 3 mag 6 15.6 h 24
KOSDE Koschny Noordwijkerh. TEC1 (1.4/12) 30 dg 4 mag 6 21.0 h 36
LUNRO Lunsford Chula Vista BOCAM (1.4/50) 60 dg 6 mag 5 19,4 h 83
MOLSI Molau Seysdorf AVIS2 (1.4/50) 60 dg 6 mag 9 23.5 h 218
MINCAM1 (0.8/6) 55 dg 3 mag 17 49.5 h 85
Ketzuer REMO1 (0.8/3.8) 80 dg 3 mag 11 21.3 h 46
REMO2 (0.8/3.8) 80 dg 3 mag 12 24.9 h 73
OCHPA Ochner Albiano ALBIANO (1.2/4.5) 68 dg 3 mag 3 13.3 h 37
PRZDA Przewozny Berlin ARMEFA (0.8/6) 55 dg 3 mag 6 17.7 h 48
SLAST Slavec Ljubljana KAYAK1 (1.8/28) 50 dg 4 mag 14 34.9 h 63
STOEN Stomeo Scorze MIN38 (0.8/3.8) 80 dg 3 mag 17 71.9 h 247
NOA38 (0.8/3.8) 80 dg 3 mag 15 51.1 h 104
SCO38 (0.8/3.8) 80 dg 3 mag 15 70.4 h 211
STRJO Strunk Herford MINCAM2 (0.8/6) 55 dg 3 mag 15 24.2 h 44
MINCAM3 (0.8/8) 42 dg 4 mag 8 14.2 h 30
MINCAM5 (0.8/6) 55 dg 3 mag 13 32.8 h 103
--------------------------------------------------------------------------------
Overall 30 1421.1 h 3610
2. Observing Times (h)
======================
June 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
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BENOR 0.8 - - - - 2.0 2.5 - - - - - - - -
BRIBE 3.9 3.2 - - 6.0 - 0.3 - 0.5 - 3.5 4.6 2.1 - -
CASFL - - - - - - - - - - 2.2 3.5 2.5 0.5 1.3
- - 3.2 - - - - - - - - 4.4 4.0 2.3 -
CRIST 1.6 5.0 - - 1.0 - - - - - 6.0 - 6.2 4.1 3.1
- - - - - - - - - - - - 4.1 - -
ELTMA - - - - - - - - - 5.1 3.1 4.4 3.3 6.1 6.0
GONRU 4.3 4.0 - 5.1 - 4.4 - 3.2 - - 7.1 5.2 - - -
2.9 1.2 - 3.1 - 4.4 - 1.2 - - 4.1 2.8 - - -
GOVMI - - 4.9 6.6 0.5 5.2 6.5 6.1 6.1 6.1 1.1 2.3 6.4 4.3 6.1
HERCA 5.6 6.0 8.0 4.9 - - 4.4 3.9 - - 6.2 4.2 0.4 5.2 4.4
- - - - - - - - - - - 6.2 2.4 1.3 6.4
HINWO 4.1 - - 3.8 - - - - - 0.9 0.8 - 1.2 - -
IGAAN - 3.3 7.3 6.3 - - 5.3 6.3 5.3 - 1.8 1.5 6.8 - 4.8
JOBKL 3.8 4.3 - - - - - - - - - 3.2 - - -
KACJA - - - - - - 6.5 3.5 3.8 6.3 3.2 2.1 5.3 2.2 3.2
3.4 1.8 0.6 0.6 - 0.6 1.2 2.8 3.2 3.7 1.2 1.8 4.2 5.2 4.3
- - - - - - - - - 6.0 2.4 3.3 4.7 5.9 2.1
- - - - - - - - - 3.0 - 0.6 4.8 2.0 1.1
KOSDE - - - - - - 3.0 - - - - 5.3 - - -
LUNRO - - 0.7 - - - - - - - - - - - 1.4
MOLSI - - - - - - - - - - 2.9 4.9 1.7 - -
3.9 5.9 1.8 0.8 - 0.7 - 0.8 0.7 2.1 3.6 3.6 4.5 - -
4.7 1.2 0.7 1.1 1.5 - 0.5 0.5 2.5 2.4 1.9 - 4.3 - -
4.7 1.2 0.2 1.0 3.5 - 0.5 0.5 1.4 2.9 4.4 0.3 4.3 - -
OCHPA 6.2 3.0 4.1 - - - - - - - - - - - -
PRZDA - - - - - - - - - - - - - - -
SLAST 3.7 1.1 - - - - - - 2.4 1.0 - 2.4 2.1 3.6 2.0
STOEN - 4.1 4.0 - 0.9 2.9 4.5 - 4.1 6.0 6.1 6.0 6.0 5.9 6.0
- 4.1 1.4 - - 2.5 3.4 - 1.6 4.0 4.1 2.6 5.0 5.9 4.0
- 6.3 3.0 - - 4.5 4.5 - 4.0 6.1 5.0 5.0 6.0 5.8 5.9
STRJO - 2.4 - - 2.6 - 0.5 0.8 - - - 1.7 1.7 - 0.6
1.6 1.0 - - - - - - - - - - 3.3 - -
3.5 2.6 1.0 2.4 - - - - - - - 3.5 3.3 1.6 -
--------------------------------------------------------------------------------
Sum 58.7 61.7 40.9 35.7 16.0 27.2 43.6 29.6 35.6 55.6 70.7 85.4100.6 61.9 62.7
June 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
--------------------------------------------------------------------------------
BENOR - 4.0 - 4.9 - - - - - - - 5.9 4.9 3.9 -
BRIBE - - - - - - 4.2 4.0 3.9 - 1.2 0.3 1.3 - 1.2
CASFL 1.0 5.9 2.0 - - 4.9 - 1.8 3.8 - 3.6 3.8 2.0 1.3 3.3
- 4.9 3.0 0.5 0.8 4.9 - - 2.3 0.5 2.5 2.0 1.5 0.5 2.5
CRIST - 4.0 5.2 - - 5.1 3.2 2.9 3.0 - 1.0 4.2 3.0 1.7 5.3
- - - - - - - - - - - - - - -
ELTMA - - - - - - - - - - - - - - -
GONRU 7.1 7.0 6.7 6.3 7.0 6.6 5.9 3.8 4.3 7.0 7.0 1.3 - - -
5.1 4.5 5.7 6.3 7.0 3.9 4.4 2.9 3.3 3.1 4.9 0.8 - 5.1 1.1
GOVMI - 6.1 4.5 1.7 - 3.1 - - - 3.8 - - - 6.0 -
HERCA 3.5 2.7 - 2.3 1.2 - - 1.3 1.9 0.7 - 1.9 1.0 1.4 1.5
5.5 7.3 - 5.0 3.4 6.9 2.7 1.8 6.9 1.0 1.9 1.9 1.0 1.4 1.5
HINWO - 1.2 0.6 - - - - - - - - - - - 3.2
IGAAN - 4.2 3.8 3.9 - - - 4.3 - - - - - - -
JOBKL 4.0 - - - - 4.2 3.6 3.5 0.9 - 3.5 - - 4.1 4.1
KACJA - 6.3 6.3 1.9 - - - - - - - - - - 1.0
- 6.2 5.2 - - 2.3 - - - 1.1 - - - 3.3 2.3
- - 6.0 1.2 1.7 - - - - - - - - - -
- - 4.1 - - - - - - - - - - - -
KOSDE 3.0 - - - - - - 2.9 - 4.0 - - - 2.8 -
LUNRO - 7.3 - - - - - - - - - 4.0 - - 6.0
MOLSI 1.6 3.0 2.4 - - - - - - - - - 2.4 1.0 3.6
5.4 4.0 2.5 - 2.5 - - - - - - - 1.1 - 5.6
- - - - - - - - - - - - - - -
- - - - - - - - - - - - - - -
OCHPA - - - - - - - - - - - - - - -
PRZDA - - - - 4.1 - 4.1 4.1 - - - 2.1 - 2.2 1.1
SLAST - 4.9 4.9 - - 0.8 - - - 2.2 - - - 0.6 3.2
STOEN - 4.9 3.4 - - - - - 1.1 - 1.0 - - - 5.0
- 5.9 3.4 - - - - - 1.2 - - - - - 2.0
- 5.9 3.4 - - - - - - - 1.0 - - - 4.0
STRJO 3.2 - - 0.8 - 0.7 0.7 2.3 2.2 - - - - 0.6 3.4
3.6 - - 2.1 - - - 0.9 0.7 - 1.0 - - - -
3.5 - - 3.5 - - 1.0 2.6 2.8 - 1.5 - - - -
--------------------------------------------------------------------------------
Sum 46.5100.2 73.1 40.4 27.7 43.4 29.8 39.1 38.3 23.4 30.1 28.2 18.2 35.9 60.9
3. Results (Meteors)
====================
June 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
--------------------------------------------------------------------------------
BENOR 2 - - - - 3 3 - - - - - - - -
BRIBE 8 14 - - 13 - 1 - 2 - 7 10 6 - -
CASFL - - - - - - - - - - 6 5 7 2 4
- - 5 - - - - - - - - 8 7 6 -
CRIST 6 19 - - 1 - - - - - 15 - 22 9 6
- - - - - - - - - - - - 14 - -
ELTMA - - - - - - - - - 10 6 7 11 17 15
GONRU 11 4 - 13 - 9 - 9 - - 23 11 - - -
5 5 - 5 - 8 - 1 - - 11 5 - - -
GOVMI - - 4 21 2 10 12 19 17 24 3 3 20 8 25
HERCA 8 5 14 6 - - 3 4 - - 13 3 1 5 5
- - - - - - - - - - - 8 4 5 8
HINWO 8 - - 12 - - - - - 3 1 - 2 - -
IGAAN - 7 13 9 - - 6 10 8 - 6 2 10 - 9
JOBKL 13 8 - - - - - - - - - 19 - - -
KACJA - - - - - - 8 4 5 6 4 4 8 2 6
6 3 1 1 - 2 4 3 8 7 4 2 9 6 5
- - - - - - - - - 23 3 5 20 9 4
- - - - - - - - - 3 - 2 8 4 1
KOSDE - - - - - - 4 - - - - 10 - - -
LUNRO - - 1 - - - - - - - - - - - 2
MOLSI - - - - - - - - - - 8 40 13 - -
3 10 2 2 - 2 - 1 1 3 5 4 9 - -
11 2 1 2 2 - 1 1 4 4 7 - 11 - -
16 3 2 4 11 - 1 2 5 8 6 2 13 - -
OCHPA 17 7 13 - - - - - - - - - - - -
PRZDA - - - - - - - - - - - - - - -
SLAST 11 1 - - - - - - 4 2 - 4 3 8 2
STOEN - 9 6 - 1 7 18 - 5 18 25 20 26 20 25
- 6 4 - - 4 7 - 3 7 11 5 16 11 7
- 20 8 - - 11 18 - 6 22 16 11 23 17 10
STRJO - 5 - - 7 - 1 2 - - - 3 2 - 1
2 1 - - - - - - - - - - 8 - -
9 6 2 17 - - - - - - - 11 6 4 -
--------------------------------------------------------------------------------
Sum 136 135 76 92 37 56 87 56 68 140 180 204 279 133 135
June 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
--------------------------------------------------------------------------------
BENOR - 5 - 12 - - - - - - - 9 6 7 -
BRIBE - - - - - - 13 20 10 - 4 1 4 - 6
CASFL 2 18 6 - - 13 - 4 10 - 6 11 6 4 5
- 10 5 1 1 8 - - 4 3 3 6 4 4 4
CRIST - 16 13 - - 19 4 8 9 - 2 16 6 6 9
- - - - - - - - - - - - - - -
ELTMA - - - - - - - - - - - - - - -
GONRU 27 23 29 17 32 17 26 19 12 22 28 2 - - -
15 11 11 12 14 9 10 4 8 10 10 1 - 15 1
GOVMI - 36 21 8 - 13 - - - 15 - - - 16 -
HERCA 7 5 - 2 1 - - 3 3 1 - 2 1 1 4
10 10 - 3 6 8 5 5 7 2 2 7 1 1 1
HINWO - 5 2 - - - - - - - - - - - 9
IGAAN - 7 5 6 - - - 6 - - - - - - -
JOBKL 22 - - - - 14 20 18 6 - 19 - - 11 17
KACJA - 11 11 3 - - - - - - - - - - 2
- 8 6 - - 3 - - - 1 - - - 4 2
- - 27 1 2 - - - - - - - - - -
- - 6 - - - - - - - - - - - -
KOSDE 4 - - - - - - 8 - 5 - - - 5 -
LUNRO - 11 - - - - - - - - - 59 - - 10
MOLSI 27 33 16 - - - - - - - - - 23 17 41
13 8 2 - 9 - - - - - - - 3 - 8
- - - - - - - - - - - - - - -
- - - - - - - - - - - - - - -
OCHPA - - - - - - - - - - - - - - -
PRZDA - - - - 12 - 15 7 - - - 4 - 6 4
SLAST - 13 7 - - 1 - - - 2 - - - 1 4
STOEN - 23 20 - - - - - 2 - 1 - - - 21
- 13 7 - - - - - 1 - - - - - 2
- 21 11 - - - - - - - 2 - - - 15
STRJO 5 - - 1 - 1 1 5 2 - - - - 2 6
9 - - 5 - - - 2 1 - 2 - - - -
15 - - 10 - - 2 8 8 - 5 - - - -
--------------------------------------------------------------------------------
Sum 156 287 205 81 77 106 96 117 83 61 84 118 54 100 171
Sirko Molau, 2009/07/28