Results of the IMO Video Meteor Network - April 2006
====================================================
Even though we still had some sporadic snow at some places, spring finally
prevailed in central Europe in April. Consequently the weather improved and
nights were getting warmer, but at the same time rapidly shorter.
47 years after the fall of the "Pribram" meteorite and 4 years after "Neu-
schwanstein", there was again increased attention towards possible activity
of the "Pribramids" at the beginning of the month. In addition to the regular
observers, two Czech cameras joined once more the effort towards the expected
maximum of the shower. That in connection with the good weather yielded to a
remarkable data set. In a first analysis, 42 out of the 811 meteors from the
first half of April could be classified as "Pribramids". That is about twice
as much as last year (17 out of 693), but still there are only vague hints
on the existence of this shower. An analysis of more than 5000 meteors from
the video meteor database with the Radiant software did not yield a clearly
defined radiant. Neither resulted my automatic radiant search on the same
data set in any hit near the expected position. If the number of "Pribramids"
is plotted relative to the number of sporadic meteors, the picture looks
similar for 2005 and 2006. This, however, is by far not conclusive. Further
observations are required to support the "Pribramid" hypothesis or to finally
disprove it.
1. Observers
============
Code Name Place Camera FOV LM Nights Time Meteors
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BENOR Benitez-S. Las Palmas TIMES% (0.95/50) 10 dg 3 mag 5 17.0 h 10
CASFL Castellani Monte Baldo BMH1 (0.8/6) 55 dg 3 mag 15 99.1 h 169
ELTMA Eltri Venezia MET38 (0.8/3.8) 80 dg 3 mag 3 18.9 h 88
EVAST Evans Moreton RF1 (0.8/12) 25 dg 5 mag 6 37.2 h 60
KACJA Kac Kostanjevec METKA (0.8/8) 42 dg 2 mag 11 68.1 h 64
Kamik REZIKA (0.8/6) 55 dg 3 mag 11 71.1 h 228
KOSDE Koschny Noordwijkerh. ICC3 (0.85/25) 25 dg 6 mag 5 19.3 h 29
LUNRO Lunsford Chula Vista BOCAM (1.4/50) 60 dg 6 mag 11 64.9 h 189
MOLSI Molau Seysdorf AVIS2 (1.4/50) 60 dg 6 mag 11 46.5 h 439
MINCAM1 (0.8/3.8) 80 dg 3 mag 18 83.1 h 116
SPEUL Sperberg Salzwedel AKM1 (0.85/25) 32 dg 6 mag 2 13.2 h 25
STOEN Stomeo Scorze MIN38 (0.8/3.8) 80 dg 3 mag 7 40.3 h 104
STORO Stork Kunzak KUN1 (1.4/50) 55 dg 6 mag 2 16.0 h 93
Ondrejov OND1 (1.4/50) 55 dg 6 mag 3 18.3 h 192
STRJO Strunk Leopoldshoehe MINCAM2 (0.8/6) 55 dg 3 mag 20 54.6 h 96
MINCAM3 (0.8/8) 42 dg 4 mag 3 6.6 h 18
TRIMI Triglav Velenje SRAKA (0.8/6) 55 dg 3 mag 17 110.1 h 216
YRJIL Yrjola Kuusankoski FINEXCAM (0.8/6) 55 dg 3 mag 15 62.1 h 228
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Sum 30 833.2 h 2339
2. Observing Times (h)
======================
Apr 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
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BENOR - - - 1.0 - - - 4.1 - 1.7 - - - - 5.0
CASFL - 4.3 6.1 - - 2.5 8.8 8.3 - - 8.0 8.3 8.3 5.0 -
ELTRI - - - - - - - - - - - - - - -
EVAST - - - 4.4 - - - - - - 7.8 - 6.0 - -
KACJA - 6.3 - 7.5 - - 9.2 1.1 - - - - - 8.8 -
3.2 7.4 1.2 5.0 - - 8.5 9.2 - - - - - - -
KOSDE 4.6 1.0 - 0.5 - - - - - - - - - 7.4 -
LUNRO - - - - - - 5.3 - 4.8 5.1 - 4.0 7.3 2.5 -
MOLSI - 1.9 - - - 7.6 5.9 - - - - - - - -
- 1.5 1.6 1.3 3.2 9.3 9.2 4.0 - - 6.0 - - 4.8 -
STOEN - - 7.9 2.2 - - - - - - - - 5.3 7.1 -
STORO - - - - - 7.8 8.2 - - - - - - - -
- - - - 2.8 8.6 6.9 - - - - - - - -
STRJO 4.7 0.5 1.0 7.5 0.5 0.5 - 3.8 1.2 6.0 - 1.0 0.5 7.7 -
- - - - - - - - - - - - - - -
TRIMI 4.0 8.8 8.8 5.0 - 3.8 8.7 8.7 - - - - - 8.3 -
YRJIL - - - - - - - - - - - - 2.3 5.2 3.0
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Sum 16.5 31.7 26.6 34.4 6.5 40.1 70.7 39.2 6.0 12.8 21.8 13.3 29.7 56.8 8.0
Apr 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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BENOR 5.2 - - - - - - - - - - - - - -
CASFL 2.7 - - - - 7.9 8.2 8.1 - - 7.9 - - - 4.7
ELTRI - - - - 6.2 6.6 - - 6.1 - - - - - -
EVAST 5.7 - - - - - - - - 6.6 - - - 6.7 -
KACJA 6.1 - - - - 8.4 8.0 2.3 7.2 3.2 - - - - -
- - - - - 7.6 7.9 8.3 8.2 4.6 - - - - -
KOSDE - - - - - - - - 5.8 - - - - - -
LUNRO - - 8.6 8.3 8.7 - - - 5.0 5.3 - - - - -
MOLSI - 4.3 - 4.2 5.3 0.8 3.4 6.7 3.5 - - - - - 2.9
- - 1.5 5.5 8.4 8.4 5.3 8.2 3.2 - - - - 0.9 0.8
STOEN - - - - 4.2 - - 6.7 6.9 - - - - - -
STORO - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - -
STRJO - - 1.5 1.0 - - - 5.0 3.2 - - 3.6 0.5 3.4 1.5
- - - - - - - - 3.8 - - 0.4 - - 2.4
TRIMI 7.2 2.0 - 1.0 8.2 8.2 8.2 6.1 8.1 5.0 - - - - -
YRJIL 4.0 - - 4.3 - 5.2 4.5 4.9 4.7 3.7 4.5 4.3 3.7 4.0 3.8
--------------------------------------------------------------------------------
Sum 30.9 6.3 11.6 24.3 41.0 53.1 45.5 56.3 65.7 28.4 12.4 8.3 4.2 15.0 16.1
3. Results (Meteors)
====================
Apr 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
--------------------------------------------------------------------------------
BENOR - - - 1 - - - 1 - 1 - - - - 5
CASFL - 6 15 - - 4 15 6 - - 8 21 13 7 -
ELTRI - - - - - - - - - - - - - - -
EVAST - - - 8 - - - - - - 14 - 6 - -
KACJA - 4 - 6 - 10 9 2 - - - - - 6 -
1 15 3 13 - - 25 33 - - - - - - -
KOSDE 10 1 - 1 - - - - - - - - - 11 -
LUNRO - - - - - - 26 - 18 28 - 8 13 3 -
MOLSI - 9 - - - 74 54 - - - - - - - -
- 3 4 2 4 8 9 3 - - 6 - - 13 -
STOEN - - 34 1 - - - - - - - - 15 13 -
STORO - - - - - 36 57 - - - - - - - -
- - - - 25 92 75 - - - - - - - -
STRJO 9 1 2 12 1 1 - 8 3 9 - 2 1 10 -
- - - - - - - - - - - - - - -
TRIMI 7 12 18 7 - 4 23 16 - - - - - 16 -
YRJIL - - - - - - - - - - - - 5 11 5
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Sum 27 51 76 51 30 229 293 69 21 38 28 31 53 90 10
Apr 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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BENOR 2 - - - - - - - - - - - - - -
CASFL 2 - - - - 20 21 15 - - 12 - - - 4
ELTRI - - - - 30 37 - - 21 - - - - - -
EVAST 8 - - - - - - - - 12 - - - 12 -
KACJA 5 - - - - - 11 3 7 1 - - - - -
- - - - - 36 40 28 26 8 - - - - -
KOSDE - - - - - - - - 6 - - - - - -
LUNRO - - 14 24 28 - - - 14 13 - - - - -
MOLSI - 53 - 20 30 2 41 77 36 - - - - - 43
- - 2 6 8 22 9 10 5 - - - - 1 1
STOEN - - - - 11 - - 17 13 - - - - - -
STORO - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - -
STRJO - - 6 2 - - - 6 6 - - 5 1 7 4
- - - - - - - - 8 - - 1 - - 9
TRIMI 13 3 - 1 11 17 34 12 16 6 - - - - -
YRJIL 1 22 26 33 43 23 7 12 11 4 12 13
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Sum 31 56 22 75 118 160 189 211 181 47 24 17 5 32 74
Sirko Molau, 2006/05/18