Results of the IMO Video Meteor Network - August 2007
=====================================================
Wouldn't it be time for a new record after the long dry period? But which
ingredients are required to obtain more meteors that at any time before?
- Many observers: One reason for the ongoing success of the IMO network is
the steadily increasing number of observers. There is always some fluctuation,
but in general the network is growing. In August 2007, 22 cameras were
operated by 16 observers. We could even welcome two new observers: On the one
hand there is Stefano Crivello (as you may guess from his name, Stefano is
based in Italy), whose camera had first light last month. This would have been
the first time with more Italian than German observers unless Niko Wuensche
did some testing with the new meteor camera of Archenhold Observatory in
Berlin. In these days, the camera will be finally installed at the observatory,
and in the future it shall give the visitors a better insight into meteors and
provide data to our network. By the way, at least with respect to the number
of video camera the Germans still have the clear lead. ;-)
Summary: This ingredient to a new record was not missing in August.
- Active meteor showers: In principle you may expect new records only in
August, October and December. Nobody will question August (Perdeids) and
December (Geminids), but you may ask why October and not November (Leonids)
or January (Quadrantids). The answer is simple - it's not only the meteor rate
that counts, but also the length of the nights. The Perseids provide plenty of
meteors for many nights, but the nights are quite short. October, on the other
hand, presents almost half of the Perseid activity thanks to the Orionids,
Taurids and sporadic activity, and the nights are almost twice as long. The
time of the Leonids is over, and the activity interval of the Quadrantids is
ways too short.
Summary: Also this ingredient for a new record was present, not to forget that
the Perseid maximum coincided with new moon in 2007.
- Good weather: In the end, everything depends on the weather. The most
splendid meteor shower is worth nothing if you only record "hydro meteors".
In this respect, the last month was not perfect, but ok. Many observers
collected more than 20 nights again, even if only few of these were perfectly
clear. Just in time the weather cooperated with the observers: On August 12/13,
19 cameras were in operation (one of my automatic cameras failed just that
night because of a power outage), and in the next night once more 15 cameras
(here one of my camera failed because of a software bug - Murphys law!).
Summary: Also the most important ingredient was present by August.
So all things came together for a new highscore, and already by mid-August
the meteor number grew over 10,000. By the end of the months we had collected
nearly 14,000 meteors, which falls only slightly short of the so far best
results (14,173 meteors in October 2006). However, 6 nights from REMO1 as well
as the data of KAYAK1 and ICC3 are still missing, so I'm optimistic that in the
end we may have even recorded close to 15,000 meteors!
With more than 1,500 hours of effective observing time, August presented a
respectable result, but in this category it cannot beat the autumn and winter
months (2,225 hours in October 2006).
Winner of the "beauty contest" last month were the Perseid plots from Biondani
Roberto and Bob Lunsford. Both aimed their cameras almost
directly at the radiant. Bobs camera had a smaller field of view, which is why
his meteors were recorded closer to the radiant than Biondanis.
However, not just the Perseids had drawn an interesting picture: Ilkka Yrjola
noted that the kappa-Cynids were remarkably active even at the end of their
nominal activity period (August 25). So I artificially increased the activity
period and recomputed the meteor shower assignment for all cameras. The result
is shown below:
This year, the kappa-Cygnids were indeed active well beyond August 25.
Unfortunately, data is scarse at the end of August, but it seems they could
easily keep up with the alpha-Aurigids at that time.
Last but not least I would like to point out, that detailed information about
the IMO Video Meteor Network and the Video Meteor Database including the
monthly reports can now be obtained at http://www.imonet.org.
1. Observers
============
Code Name Place Camera FOV LM Nights Time Meteors
--------------------------------------------------------------------------------
BRIBE Brinkmann Herne HERMINE (0.8/6) 55 dg 3 mag 8 43.4 h 344
CASFL Castellani Monte Baldo BMH1 (0.8/6) 55 dg 3 mag 25 93.4 h 439
CRIST Crivello Valbrevenna STG38 (0.8/3.8) 80 dg 3 mag 1 6.6 h 28
ELTMA Eltri Venezia MET38 (0.8/3.8) 80 dg 3 mag 13 91.7 h 642
EVAST Evans Moreton RF1 (0.8/12) 25 dg 5 mag 13 64.2 h 530
HINWO Hinz Brannenburg AKM2 (0.85/25) 32 dg 6 mag 10 57.5 h 570
KACJA Kac Kostanjevec METKA (0.8/8) 42 dg 4 mag 25 122.8 h 802
Ljubljana ORION1 (0.8/8) 42 dg 4 mag 25 129.2 h 1248
LUNRO Lunsford Chula Vista BOCAM (1.4/50) 60 dg 6 mag 6 20.7 h 978
MOLSI Molau Seysdorf AVIS2 (1.4/50) 60 dg 6 mag 19 81.9 h 1716
MINCAM1 (0.8/6) 55 dg 3 mag 24 101.5 h 683
Ketzuer REMO1 (0.8/3.8) 80 dg 3 mag 21 102.3 h 923
ROBBI Roberto Verona FIAMENE (0.8/3.8) 80 dg 3 mag 17 86.3 h 531
STOEN Stomeo Scorze MIN38 (0.8/3.8) 80 dg 3 mag 17 111.7 h 837
STORO Stork Kunzak KUN1 (1.4/50) 55 dg 6 mag 1 5.2 h 397
Ondrejov OND1 (1.4/50) 55 dg 6 mag 2 11.2 h 686
STRJO Strunk Herford MINCAM2 (0.8/6) 55 dg 3 mag 20 64.9 h 296
MINCAM3 (0.8/8) 42 dg 4 mag 11 41.5 h 137
MINCAM5 (0.8/6) 55 dg 3 mag 21 76.0 h 619
TRIMI Triglav Velenje SRAKA (0.8/6) 55 dg 3 mag 26 123.4 h 741
WUNNI Wuensche Berlin ARMEFA (0.8/6) 55 dg 3 mag 2 8.0 h 176
YRJIL Yrjola Kuusankoski FINEXCAM (0.8/6) 55 dg 3 mag 20 65.2 h 628
--------------------------------------------------------------------------------
Sum 31 1508.6 h 13951
2. Observing Times (h)
======================
Aug 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
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BRIBE 4.9 0.3 7.2 7.1 7.1 - - - - - 2.0 7.0 7.8 - -
CASFL 3.4 1.7 - 5.4 1.0 1.5 1.2 1.7 4.9 3.9 3.0 7.2 5.9 7.5 7.1
CRIST - - - - - - - - - - - - - - -
ELTMA - - - 6.7 7.2 5.6 - - 7.4 - 3.6 7.4 - 7.6 7.5
EVAST - - - 5.5 - 5.3 5.6 2.3 5.9 5.7 2.6 6.1 - - -
HINWO 6.1 - - 6.4 6.5 4.2 - - - 0.8 - 7.0 4.8 7.1 5.1
KACJA 7.1 5.1 3.8 5.0 7.3 7.1 5.2 5.6 5.2 - 5.1 7.4 3.2 7.7 7.9
7.0 5.9 3.4 6.7 7.6 7.6 3.5 3.8 - - 5.9 7.9 2.5 5.5 8.0
LUNRO - - - - - - 1.0 6.5 0.3 - 3.1 4.9 4.9 - -
MOLSI 5.7 - 2.1 6.3 6.6 5.0 - 4.8 - - - 6.3 - 4.7 -
6.9 - 1.5 5.5 7.2 5.9 0.3 1.3 - - - - 3.6 7.7 1.0
6.2 - 6.3 6.4 6.4 6.5 0.9 6.1 4.2 1.3 - 7.0 5.7 6.8 0.5
ROBBI 7.4 - - - - - - - - 3.0 7.2 7.7 6.8 7.8 -
STOEN 6.6 0.3 7.2 - 7.3 5.1 3.5 - 7.5 - 5.0 7.8 - 7.4 7.0
STORO - - - - - - - - - - - 5.2 - - -
- - - - - - - - - - - 4.8 6.4 - -
STRJO 3.0 - 4.7 5.8 5.9 2.7 - - - - 6.4 2.7 6.5 - -
3.5 0.5 5.8 5.8 - - - - - - - - - - -
3.9 0.8 4.8 5.8 5.9 3.9 - - - - 6.4 2.7 6.5 - 0.5
TRIMI 7.0 3.8 6.2 5.8 6.7 6.8 3.2 3.0 5.5 - 6.5 7.2 4.7 5.0 8.0
WUNNI - - - - - - - - - - - 4.0 4.0 - -
YRJIL - - - - - - 2.3 3.0 3.2 2.1 3.5 3.3 3.9 - 4.0
--------------------------------------------------------------------------------
Sum 78.7 18.4 53.0 84.2 82.7 67.2 26.7 38.1 44.1 16.8 60.3113.6 77.2 74.8 56.6
Aug 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
-------------------------------------------------------------------------------------
BRIBE - - - - - - - - - - - - - - - -
CASFL 3.6 4.5 6.1 - - - - - 3.5 4.4 4.5 4.4 1.0 1.0 0.5 4.5
CRIST - - - - - - - - - 6.6 - - - - - -
ELTMA 7.7 - 7.7 - - - - - - 8.0 8.3 - - - - 7.0
EVAST 3.9 - - - - - - - 7.1 5.4 4.5 - - 4.3 - -
HINWO - - - - - - - 5.4 4.1 - - - - - - -
KACJA 3.5 2.2 1.4 6.1 3.5 0.9 - - - 6.2 8.9 3.9 - - - 3.5
4.7 1.1 2.3 7.1 - - 0.3 3.7 6.2 4.7 8.8 7.1 0.9 - - 7.0
LUNRO - - - - - - - - - - - - - - - -
MOLSI 6.3 2.8 1.0 1.7 - 1.6 6.5 1.2 2.5 7.0 4.9 - - - 4.9 -
7.3 3.6 8.0 3.0 - 3.1 1.0 6.8 6.8 8.4 6.4 1.0 0.7 - 4.1 0.4
- 4.8 5.4 0.7 - 3.6 6.2 1.6 7.8 7.9 - - - - - -
ROBBI - 5.7 6.0 0.9 - 3.0 - 5.3 2.4 8.5 4.5 5.2 3.8 - - 1.1
STOEN 7.9 - - - - - - 7.9 7.7 8.3 7.9 - - - - 7.3
STORO - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - -
STRJO 3.0 5.0 2.7 2.3 0.5 - - - 3.5 4.0 1.0 0.5 2.1 1.8 0.8 -
- - - 4.2 1.6 - - - 3.7 3.4 2.7 - 4.5 5.8 - -
5.0 4.5 6.4 3.0 1.6 - 0.8 - 5.1 4.0 1.0 - 0.5 2.9 - -
TRIMI 4.3 2.1 - 3.1 1.8 1.8 1.5 5.8 5.9 5.2 6.6 2.4 - - - 3.5
WUNNI - - - - - - - - - - - - - - - -
YRJIL 0.1 - - 4.7 5.0 2.1 4.0 2.8 4.6 5.4 3.1 0.2 - - 2.5 5.4
-------------------------------------------------------------------------------------
Sum 57.3 36.3 47.0 36.8 14.0 16.1 20.3 40.5 70.9 97.4 73.1 24.7 13.5 15.8 12.8 39.7
3. Results (Meteors)
====================
August 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
--------------------------------------------------------------------------------
BRIBE 2 10 - - - - 16 - 2 9 - - 25 23 13
CASFL - 4 9 11 20 14 14 - - - 5 17 12 15 13
EVAST - - - - - 5 15 - - - - - - - -
HINWO - 1 - - - 1 3 - - - - - 34 26 39
KACJA 14 4 - - - 23 15 - - 4 20 24 35 38 35
11 5 3 1 16 - - 17 2 8 35 24 34 34 42
KOSDE 2 - - - - - - - - - - - 24 15 11
LUNRO - - - - - - - - - 1 - 43 52 - -
MOLSI - 35 - - - 42 15 - - 10 - - 74 100 75
- 11 - 2 - 13 6 2 1 4 - 1 30 29 18
4 - 4 - - 2 8 15 - 3 - 1 20 11 29
STOEN 15 3 - 24 31 32 - 2 17 - 44 26 25 29 27
STRJO - - 1 - - - 9 - - - - - 9 - 6
- - - - - - 3 - - - - - 17 - -
- - - - - - 14 - - - - - - - 12
TRIMI 13 4 - 7 14 16 17 13 - 10 19 15 25 15 27
--------------------------------------------------------------------------------
Sum 61 77 17 45 81 148 135 49 22 49 123 151 416 335 347
August 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
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BRIBE 3 28 16 9 9 1 27 9 2 21 - - 1 26 7 34
CASFL 13 19 17 17 13 19 - 14 17 24 27 23 16 19 7 13
EVAST - - - - - - - - - - - 29 - 34 24 31
HINWO 35 14 - - - 1 - - - 49 20 15 4 - 6 -
KACJA 37 31 21 28 19 22 36 36 - 35 38 19 - - 27 33
51 38 30 48 - - - 26 26 82 79 60 - 20 22 102
KOSDE - 2 27 18 4 9 44 - - - - - - - - -
LUNRO - - - - - - - - 5 58 - - - 7 3 -
MOLSI 50 - - - - - 48 - - 104 50 3 - - - -
23 5 3 1 - - 15 - - 32 26 2 10 - 60 63
- 23 8 - 15 - 12 - 8 22 3 15 19 - 59 37
STOEN 25 28 25 34 - - 36 29 39 39 46 42 - 1 - -
STRJO 2 - 5 1 4 - 13 4 7 9 - 2 1 2 - 16
- 4 - - - - 13 - - 8 - - - - - 16
- 5 12 - - - 27 - - 13 - - - - - 19
TRIMI 19 16 15 24 23 18 22 30 26 43 35 31 - 2 3 44
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Sum 258 213 179 180 87 70 293 148 130 539 324 241 51 111 218 408
Aug 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
--------------------------------------------------------------------------------
BRIBE 14 1 29 37 45 - - - - - 9 155 54 - -
CASFL 13 2 - 27 3 7 2 7 33 13 28 62 43 48 27
CRIST - - - - - - - - - - - - - - -
ELTMA - - - 19 53 31 - - 81 - 51 136 - 53 59
EVAST - - - 39 - 39 49 8 34 56 27 128 - - -
HINWO 54 - - 34 56 30 - - - 6 - 144 66 100 20
KACJA 35 23 12 26 46 49 41 37 26 - 30 154 16 70 72
78 57 18 64 81 88 31 53 - - 46 238 9 84 102
LUNRO - - - - - - 2 45 2 - 174 347 408 - -
MOLSI 78 - 11 89 138 98 - 106 - - - 340 - 135 -
46 - 3 51 60 58 1 3 - - - - 43 113 6
38 - 65 41 78 34 5 56 36 4 - 108 139 79 2
ROBBI 25 - - - - - - - - 8 53 115 65 76 -
STOEN 47 2 62 - 66 27 15 - 85 - 50 135 - 64 52
STORO - - - - - - - - - - - 397 - - -
- - - - - - - - - - - 258 428 - -
STRJO 8 - 16 25 34 9 - - - - 60 8 53 - -
19 1 17 28 - - - - - - - - - - -
21 2 17 41 56 14 - - - - 148 18 126 - 1
TRIMI 35 19 27 27 43 66 26 23 37 - 37 64 26 52 72
WUNNI - - - - - - - - - - - 111 65 - -
YRJIL - - - - - - 24 43 44 20 54 51 79 - 56
--------------------------------------------------------------------------------
Sum 511 107 277 548 759 550 196 381 378 107 767 2969 1620 874 469
Aug 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
-------------------------------------------------------------------------------------
BRIBE - - - - - - - - - - - - - - - -
CASFL 9 22 25 - - - - - 9 14 13 14 4 2 1 11
CRIST - - - - - - - - - 28 - - - - - -
ELTMA 42 - 34 - - - - - - 34 25 - - - - 24
EVAST 29 - - - - - - - 57 23 25 - - 16 - -
HINWO - - - - - - - 48 12 - - - - - - -
KACJA 11 7 3 24 24 7 - - - 32 32 13 - - - 12
30 3 5 23 - - 2 20 50 33 60 41 1 - - 31
LUNRO - - - - - - - - - - - - - - - -
MOLSI 195 72 26 11 - 31 153 5 36 100 57 - - - 35 -
- 17 54 11 - 14 4 53 32 49 28 8 2 - 25 2
76 36 39 3 - 10 29 4 24 17 - - - - - -
ROBBI - 37 33 2 - 14 - 29 7 26 11 18 8 - - 4
STOEN 37 - - - - - - 47 38 48 31 - - - - 31
STORO - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - -
STRJO 11 16 8 9 2 - - - 9 8 3 2 6 6 3 -
- - - 19 3 - - - 9 8 4 - 13 16 - -
21 42 33 17 5 - 2 - 23 13 4 - 1 14 - -
TRIMI 16 10 - 8 11 3 5 25 33 21 29 7 - - - 19
WUNNI - - - - - - - - - - - - - - - -
YRJIL 1 - - 45 28 7 29 6 24 39 25 1 - - 14 38
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Sum 478 262 260 172 73 86 224 237 363 493 347 104 35 54 78 172
Sirko Molau, 2007/09/18