Results of the AKM Video Meteor Network - June 2001
===================================================
The first few June nights were a complete loss for the European observers.
A few cloud gap observations followed, but only after the solstitium the
picture really improved. Temperatures increased and there was a longer spell
of clear skies which was used by most observers.
In June we had first light for one of the two new AKM video meteor cameras.
It was operated by me in parallel to my own camera AVIS from Aachen. Even
though AKM2 has a smaller field of view and only a little better limiting
magnitude, it recorded more meteors that AVIS in all nights. This shows how
powerful the new cameras are.
Juergen Rendtel worked for two weeks at the observatory on Teneriffe, where
he operated the camera of Luis Bellot. Skies at the observatory were not only
clear all the time, but due to the low geographic latitude the nights were
also twice as long as in Germany. The really dark skies did the the rest of
the job. In the end Juergen recorded on average more than a hundred meteors
per night.
However, this should not discourage other observers with less perfect
observing sites. The hourly rate at the observatory was 15. That's "only" a
factor 4..5 more than what other cameras recorded at the bright June skies.
In the presence of moon this difference decreases significantly, and so many
clear nights are the exception, anyway. So we need the data from all cameras!
No need to add that the "drought time" for the northern hemisphere observers
is almost over. The nights are getting longer again and meteor activity is
increasing significantly. In 2000 80% of all meteors were recorded in the
second half of the year!
By the end of June most observers recorded a few June-Bootids. However, an
outburst as in 1998 was not observed, which is also confirmed by visual
observations. Even Rob McNaught could catch a few JBOs down under. He gained
from the large zenithal attraction caused by the low encounter velocity of
the meteoroids of that stream. The nominal radiant never climbs higher than
10 deg over the Coonabarabran horizon.
Rob also proved that he is always good for a new record: On June 16 he recorded
more than 500 meteors - that's almost twice as much as we recorded in the
whole of June 2000!
1. Observers
============
Code Name Place Camera FOV LM Nights Time Meteors
----------------------------------------------------------------------------------
BENOR Benitez S. Maspalomas TIMES4 (1.4/50) 20 dg 8 mag 5 27.5 h 123
EVAST Evans Little Thurlow EMILY (1.8/28) 36 dg 5 mag 2 5.5 h 11
KOSDE Koschny Noordwijkerhout ICC4 (0.85/25) 25 dg 6 mag 5 18.9 h 44
KNOAN Knoefel Duesseldorf VIDEOMET (0.75/50) 20 dg 7 mag 1 3.5 h 7
MCNRO McNaught Coonabarabran SSO1 (1.2/85) 13 dg 9 mag 18 161.18 h 4173
SSO-WAT1 (0.85/25) 9 dg 7 mag 5 43.6 h 128
MOLSI Molau Aachen AVIS (2.0/35) 40 dg 5 mag 14 42.6 h 152
AKM2 (0.85/25) 32 dg 6 mag 4 13.0 h 73
RENJU Rendtel Marquardt CARMEN (1.8/28) 28 dg 5 mag 1 2.0 h 4
Izana TIMES1 (1.4/50) 20 dg 7 mag 12 95.2 h 1599
STRJO Strunk Leopoldshoehe FAMOS (2.0/28) 45 dg 5 mag 7 25.7 h 49
----------------------------------------------------------------------------------
Overall 29 438.0 h 6363
2. Observing Times (h)
======================
Jun 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
--------------------------------------------------------------------------------
BENOR - - - - - - - - 6.2 5.7 6.1 - - - -
EVAST - - - - - - - 3.0 - - - - - - -
KOSDE - - - - - - - 2.8 - 4.3 - - - - -
KNOAN - - - - - - - - - - - - - - -
MCNRO 2.4 9.7 3.4 - - - - - - - 8.1 - - 7.3 3.2
- 2.0 - 7.3 11.1 11.7 - - - 11.5 - - - - -
MOLSI - - - - - - - - - - 1.0 4.6 1.7 1.0 -
- - - - - - - - - - - - - - -
RENJU - - - - - - - - - - - 2.0 - - -
- - - - - - - - - - - - - - -
STRJO - - - - - - - - - 3.0 - - - - -
--------------------------------------------------------------------------------
Sum 2.4 11.7 3.4 7.3 11.1 11.7 - 5.8 6.2 24.5 15.2 6.6 1.7 8.3 3.2
Jun 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
--------------------------------------------------------------------------------
BENOR 5.5 - - - - - 4.0 - - - - - - - -
EVAST - - - - - - 2.5 - - - - - - - -
KOSDE - - - - - - - 3.6 4.1 4.1 - - - - -
KNOAN - - - - - - - - - - 3.5 - - - -
MCNRO 10.9 10.1 11.4 9.7 11.1 - 10.3 10.9 - 5.1 9.7 10.9 8.4 7.2 11.3
- - - - - - - - - - - - - - -
MOLSI - - - 4.4 2.6 4.0 4.1 4.6 2.9 4.6 4.0 - - 0.3 2.8
- - - - - 3.1 - - 2.5 3.9 3.5 - - - -
RENJU - - - - - - - - - - - - - - -
8.0 7.7 8.1 5.1 8.0 7.7 7.3 7.8 8.1 7.8 5.3 8.1 6.2 - -
STRJO - - - 3.6 - - - 3.7 3.6 3.8 3.8 - - 3.6 -
--------------------------------------------------------------------------------
Sum 24.4 17.8 19.5 22.8 21.7 14.8 28.2 30.6 21.2 29.3 29.6 19.0 14.6 11.1 14.1
3. Results (Meteors)
====================
Jun 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
-------------------------------------------------------------------------------
BENOR - - - - - - - - 15 21 22 - - - -
EVAST - - - - - - - 4 - - - - - - -
KOSDE - - - - - - - 10 - 2 - - - - -
KNOAN - - - - - - - - - - - - - - -
MCNRO 190 270 35 - - - - - - - 141 - - 148 24
- 6 - 30 40 25 - - - 27 - - - - -
MOLSI - - - - - - - - - - 2 9 3 1 -
- - - - - - - - - - - - - - -
RENJU - - - - - - - - - - - 4 - - -
- - - - - - - - - - - - - - -
STRJO - - - - - - - - - 3 - - - - -
-------------------------------------------------------------------------------
Sum 190 276 35 30 40 25 - 14 15 53 165 13 3 149 24
Jun 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
--------------------------------------------------------------------------------
BENOR 49 - - - - - 16 - - - - - - - -
EVAST - - - - - - 7 - - - - - - - -
KOSDE - - - - - - - 6 18 8 - - - - -
KNOAN - - - - - - - - - - 7 - - - -
MCNRO 508 286 349 291 327 - 298 248 - 93 276 265 138 146 140
- - - - - - - - - - - - - - -
MOLSI - - - 13 10 19 18 32 9 15 12 - - 1 8
- - - - - 22 - - 11 22 18 - - - -
RENJU - - - - - - - - - - - - - - -
98 90 122 105 161 132 117 157 101 93 79 153 191 - -
STRJO - - - 11 - - - 7 7 8 7 - - 6 -
--------------------------------------------------------------------------------
Sum 655 376 471 420 498 173 456 450 146 239 399 418 329 153 148
Sirko Molau, 2001/07/12