Results of the IMO Video Meteor Network - October 2009
======================================================
Whereas for our south European and American observers the good weather
continued in October, we had the typical autumn weather conditions farther
north. Hence, there were just 17 cameras last month that recorded meteors
in twenty or more nights. On the other hand, nights are getting longer in
October. So we almost reached the August and September result and collected
for the third time in a row nearly 4,000 hours of effective observing time.
With respect to meteor counts, the Orionids and Taurids were clearly
noticeable. With 21,500 meteors we did not quite reach the August result, but
recorded a few thousand meteors more than in September.
Once more, there were four non-intensified cameras (SCO38, MIN38, TEMPLAR1,
C3P8) among the five cameras with highest meteor counts - only BOCAM was
among the top performing cameras. The highest nightly counts were obtained
with image-intensified cameras (AVIS2: 338, BOCAM:234), but the better
observing conditions in Italy and Spain more than compensated for this
advantage.
Also in 2009, the Orionids (MDC: 8 ORI) were more active than in the years
before 2006. The IMO Quick Look analysis of visual observations derived ZHR
values beyond 30 between the morning of October 20 and the evening of
October 23 with maximum rates of 45 in the nights of October 21/22 and 22/23.
Overall, the observing conditions were less than perfect, so that only a few
observers obtained longer observing series. The same happened to the video
observers - beside SALSA there was not a single camera with clear skies in
the full maximum period. Thus, the analysis of the 2009 data was based on
averaging the data over all cameras again. For each night, the number of
Orionids (7,238 in total) and sporadic meteors (9,746 in total) was
determined. The ratio between both figures is a rough measure of the Orionid
activity (figure 1). The Orionids show the typical symmetric profile,
whereby the maximum between October 21/22 and 23/24 lasted somewhat longer
than in the visual data. The long-term video rate profile of the Orionids
obtained in the latest meteor shower analysis is given for comparison.
Both profiles agree well.
Figure 1: Activity profile of the Orionids 2009. The red line represents
the long-term activity profile from the last comprehensive meteor shower
analysis in autumn 2009.
Figure 2 gives the same profile for the southern (MDC: 2 STA) and northern
(MDC: 17 NTA) Taurids. Due to the smaller data set (1,537 STA, 1,297 NTA),
the scatter is larger than for the Orionids. Still, the trend observed
earlier, that the southern branch is dominating in early October, whereby
both branches become equally strong towards the end, is clearly visible in
the 2009 data as well.
Figure 2: Activity profile of the northern and southern Taurids in 2009.
The October Ursae Majorids (named tau Ursa Majorids - TUM - in previous
analyses, now MDC: 333 OCU) were discovered by Japanese observers around
S. Uehara in 2006 and confirmed by us only a few days later. In the recent
comprehensive analyses of IMO video data, the shower was detected between
October 12 and 20 with a maximum video rate of 2.5 on October 15. Based
on 327 shower members, the maximum date could be confirmed in 2009 as
presented in figure 3. The same graph shows that the Leonis Minorids
(MDC: 22 LMI) a few days later presented the same activity looking at the
plain meteor counts (330 in total). Note, that the analysis procedure applied
here does not account for different radiant altitudes. Thus, with respect
to ZHR the LMI should have been somewhat stronger than OCU, with matches
to the long-term result (maximum video rate of 4.2). The date of maximum of
the Leonids Minoris (October 23) did also agree with the long-term value.
Figure 3: Activity profile of the October Ursae Majorids and the Leonis
Minorids 2009.
In the end let's have a closer look at the October Camelopardalids
(MDC: 281 OCT). Finnish observers around J. Moilanen and E. Lyytinen noticed
activity from this shower in 2005. In the same year, our camera network
recorded about a dozen shower members - typically too few for a meteor shower
identification. However, the activity was concentrated on a short time
interval of roughly two hours in the evening with minimum sporadic activity.
So the shower was clearly noticeable. Since it was never observed before,
we first thought of a singular outburst. In the next year, however, we
confirmed the hypothesis of E. Lyytinen, that this is in fact an annual
shower. With the expected offset of 6 hours, more than 40 shower members
were recorded in a short time interval. In our last full analysis of the
IMO Video Meteor Database, the shower was not found with the standard
parameter set, because it was ways to short for the applied minimum shower
duration criterion. Still, we could identify the October Camelopardalids
in the Solar longitude interval 192-193 degrees with a maximum video rate
of 2.0.
Based on the complete IMO Video Meteor Database including the 2009 data,
I now obtained an activity profile of high temporal resolution from the
shower. Between Solar longitude 191 and 194, the number of Camelopardalids
(214 in total) and sporadic meteors (3,592 in total) was determined in bins
of 0.1 degrees Solar longitude (about 2.5 hours). The result is given in
figure 4. Despite the short interval length, the profile shows remarkably
little scatter. The OCT are only active between Solar longitude 192.5 and
192.8, i.e. within about 5 to 6 hours of time. The activity outside this
interval should be the sporadic background, i.e. meteors that matched only by
chance the OCT radiant. At maximum (in the Solar longitude interval
192.6-192.7 degrees) the shower reaches about half the sporadic meteor count.
In other words, every fifth recorded meteor in that interval was an
October Camelopardalid.
Figure 4: Long-term activity profile of the October Camelopardalids with
high temporal resolution, based on observations of the IMO Video Meteor
Network including 2009.
1. Observers
============
Code Name Place Camera FOV LM Nights Time Meteors
--------------------------------------------------------------------------------
BENOR Benitez-S. Las Palmas TIMES4 (1.4/50) 20 dg 3 mag 20 100.5 h 319
TIMES5 (0.95/50) 10 dg 3 mag 18 72.5 h 131
BRIBE Brinkmann Herne HERMINE (0.8/6) 55 dg 3 mag 22 109.1 h 633
CASFL Castellani Monte Baldo BMH1 (0.8/6) 55 dg 3 mag 16 101.2 h 453
BMH2 (0.8/6) 55 dg 3 mag 16 113.1 h 613
CRIST Crivello Valbrevenna C3P8 (0.8/3.8) 80 dg 3 mag 25 173.3 h 1207
STG38 (0.8/3.8) 80 dg 3 mag 26 138.1 h 467
ELTMA Eltri Venezia MET38 (0.8/3.8) 80 dg 3 mag 16 121.0 h 722
GONRU Goncalves Tomar TEMPLAR1 (0.8/6) 55 dg 3 mag 25 188.1 h 1235
TEMPLAR2 (0.8/6) 55 dg 3 mag 24 176.0 h 728
GOVMI Govedic Sredisce ORION2 (0.8/8) 42 dg 4 mag 19 84.2 h 354
HERCA Hergenroth. Tucson SALSA (1.2/4) 80 dg 3 mag 26 180.0 h 692
SALSA2 (1.2/4) 80 dg 3 mag 27 192.2 h 919
HINWO Hinz Brannenburg AKM2 (0.85/25) 32 dg 6 mag 10 55.5 h 465
JOBKL Jobse Oostkapelle BETSY2 (1.2/85) 25 dg 7 mag 15 115.8 h 923
KACJA Kac Kostanjevec METKA (0.8/8) 42 dg 4 mag 11 62.3 h 200
Ljubljana ORION1 (0.8/8) 42 dg 4 mag 23 97.6 h 427
Kamnik REZIKA (0.8/6) 55 dg 3 mag 1 6.5 h 75
KOSDE Koschny Noordwijkerh. TEC1 (1.4/12) 30 dg 4 mag 6 23.8 h 67
LUNRO Lunsford Chula Vista BOCAM (1.4/50) 60 dg 6 mag 22 155.8 h 1587
MOLSI Molau Seysdorf AVIS2 (1.4/50) 60 dg 6 mag 9 53.1 h 806
MINCAM1 (0.8/8) 42 dg 4 mag 19 91.6 h 488
Ketzuer REMO1 (0.8/3.8) 80 dg 3 mag 22 99.1 h 521
REMO2 (0.8/3.8) 80 dg 3 mag 20 69.3 h 220
OCHPA Ochner Albiano ALBIANO (1.2/4.5) 68 dg 3 mag 24 164.0 h 794
SCHHA Schremmer Niederkr. DORAEMON (0.8/3.8)80 dg 3 mag 18 91.1 h 459
SLAST Slavec Ljubljana KAYAK1 (1.8/28) 50 dg 4 mag 15 79.7 h 178
STOEN Stomeo Scorze MIN38 (0.8/3.8) 80 dg 3 mag 22 163.7 h 1360
NOA38 (0.8/3.8) 80 dg 3 mag 23 142.8 h 791
SCO38 (0.8/3.8) 80 dg 3 mag 24 174.7 h 1708
STRJO Strunk Herford MINCAM2 (0.8/6) 55 dg 3 mag 20 92.1 h 362
MINCAM3 (0.8/8) 42 dg 4 mag 15 76.1 h 309
MINCAM5 (0.8/6) 55 dg 3 mag 18 109.1 h 677
TEPIS Tepliczky Budapest HUMOB (0.8/3.8) 80 dg 3 mag 7 50.0 h 134
YRJIL Yrjola Kuusankoski FINEXCAM (0.8/6) 55 dg 3 mag 14 100.7 h 598
--------------------------------------------------------------------------------
Overall 31 3824.5 h 21622
2. Observing Times (h)
======================
Oct 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
--------------------------------------------------------------------------------
BENOR - 3.3 - - 4.3 3.9 - - - - 4.6 6.8 4.9 6.4 5.9
3.0 - 3.5 6.7 - 4.9 8.5 - - - - - - 5.0 2.8
BRIBE 2.8 4.7 0.3 7.8 - - - 8.3 1.0 - 0.9 7.8 6.8 9.4 5.8
CASFL 3.2 1.9 2.9 - - - - - - - - - - - -
6.9 3.4 4.8 - - - - - - - - - - - -
CRIST 6.3 8.5 4.1 5.4 - - - 2.0 - 9.1 2.8 10.3 10.6 11.1 8.2
9.5 9.6 3.0 4.1 - - 2.8 1.0 1.0 6.6 3.3 9.1 9.2 10.2 7.2
ELTMA - 3.4 7.2 3.0 - - - - - - - 8.8 8.3 - 8.7
GONRU 7.2 9.5 4.5 1.4 - - 1.1 7.5 10.3 2.6 10.9 11.0 9.9 11.1 10.1
2.7 7.5 6.7 - - - 1.3 7.7 10.4 6.3 8.9 11.0 8.0 11.1 9.0
GOVMI - 3.1 10.6 8.3 - 1.0 - 3.3 0.9 - 1.0 - 9.9 - 7.0
HERCA 6.4 3.4 - 2.0 2.5 - - - 7.6 3.9 4.2 6.9 4.6 5.1 8.6
5.4 6.4 - 6.5 1.7 - 1.0 - 7.6 2.9 5.2 4.8 5.6 6.2 10.2
HINWO - - 2.3 0.8 - - 2.4 - - - - - - - -
JOBKL 6.2 - - - - - - 7.4 - 5.0 9.0 7.4 - 10.7 4.8
KACJA - - 6.7 7.9 2.7 2.9 9.0 3.2 - - - - - 2.8 -
- 0.9 3.4 6.8 2.0 1.9 5.0 1.4 - - - 5.1 4.7 2.9 6.7
- - - - - - - - - - - - - - -
KOSDE - - - 2.2 - - - 6.6 - - - - - - -
LUNRO 8.2 9.6 6.4 - - 9.2 3.7 6.4 9.9 - - - - - 10.0
MOLSI 1.4 7.6 8.0 8.1 - - - - - - - - - - -
1.9 7.7 6.3 7.8 1.1 2.4 2.9 - - 2.5 - 1.8 8.9 1.1 -
2.4 4.0 1.5 6.0 0.4 0.5 0.2 6.4 5.0 - - 6.2 8.3 0.5 -
4.2 0.4 0.6 8.8 - - 1.4 0.9 7.9 - - 2.3 1.8 - -
OCHPA - - 4.2 - 6.3 1.6 - 2.1 3.1 6.1 - 8.7 9.4 9.4 8.4
SCHHA 5.7 5.2 - 3.2 - - - 5.7 - - - 4.6 8.3 8.5 2.8
SLAST - 3.3 - 7.0 - - 4.0 2.2 - - - 5.7 7.5 3.8 7.5
STOEN - 6.1 7.1 5.8 4.2 1.5 - 1.0 - - 3.3 9.1 10.5 10.7 9.6
- 2.2 6.1 1.7 4.9 3.1 - - - - 2.0 9.2 9.5 8.2 8.2
- 5.1 9.1 5.9 5.9 5.0 - 2.1 - - 2.9 10.1 9.5 8.5 8.7
STRJO 1.5 0.5 - 7.9 - - - 8.6 2.9 - 1.5 0.7 5.0 6.6 6.0
1.0 - - 8.5 - - - 5.4 3.0 - - 1.5 9.7 9.6 4.3
2.2 - - 7.2 - - - 7.7 4.4 - - 3.2 10.0 10.8 4.5
TEPIS 2.3 6.7 10.6 8.6 - - 10.6 - - - - - - - -
YRJIL 4.3 10.2 - - 3.8 4.8 4.5 7.5 10.3 9.9 2.0 - 9.8 10.4 -
--------------------------------------------------------------------------------
Sum 94.7134.2119.9149.4 39.8 42.7 58.4104.4 85.3 54.9 62.5152.1190.7180.1165.0
Oct 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
-------------------------------------------------------------------------------------
BENOR 5.4 7.4 4.4 6.4 4.4 4.9 6.4 5.9 5.9 1.5 - 4.4 3.4 - - -
3.5 1.8 1.5 4.5 4.0 - 1.0 4.0 - 7.5 2.5 - 3.0 4.8 - -
BRIBE 5.8 5.1 2.1 9.1 6.6 1.3 2.9 4.0 0.6 6.8 - 9.2 - - - -
CASFL 5.7 11.3 6.6 6.1 2.0 - 7.1 1.3 8.2 11.7 8.0 9.8 4.4 - - 11.0
6.7 11.2 6.6 8.0 4.2 - 7.5 2.2 8.5 10.4 8.0 11.4 3.8 - - 9.5
CRIST 4.9 8.1 11.1 3.0 - 1.0 1.7 10.2 6.9 10.4 10.6 - 1.0 9.2 8.3 8.5
6.1 5.3 10.4 2.5 - - 1.0 7.0 3.6 8.5 3.2 2.2 - 4.1 1.6 6.0
ELTMA 6.0 10.0 10.5 6.1 2.7 - 4.1 - 10.7 10.6 10.1 10.8 - - - -
GONRU 11.2 11.2 11.2 - 5.7 - 8.5 - 9.2 1.7 9.3 10.6 2.1 5.4 4.9 -
9.2 9.2 11.2 - 4.8 - 8.5 - 8.2 4.2 9.3 7.6 4.1 3.1 4.9 1.1
GOVMI 1.3 - - - 10.2 4.7 5.0 - 0.8 - 3.2 - 2.3 2.8 1.0 7.8
HERCA 7.0 11.0 7.4 4.4 11.1 9.1 8.6 6.7 10.7 7.6 10.3 6.0 - 7.3 9.8 7.8
11.0 11.0 6.9 4.7 9.1 8.2 9.6 6.7 10.8 7.6 8.3 6.0 - 9.0 8.4 11.4
HINWO - - - 11.1 11.2 4.4 7.7 - - - - 7.6 7.2 - - 0.8
JOBKL 7.7 8.9 6.0 8.0 - - 7.9 6.3 10.3 - - - - 10.2 - -
KACJA - 1.2 - - 9.4 - - - - - - 7.0 - - - 9.5
6.3 6.4 10.3 7.2 6.3 - 7.1 - 0.6 - 1.9 3.5 0.8 2.9 - 3.5
- - 6.5 - - - - - - - - - - - - -
KOSDE - 6.2 - - - - - 3.6 4.7 - - - - - 0.5 -
LUNRO 10.5 7.8 9.2 - - 3.7 4.0 1.9 8.6 1.6 9.2 8.9 2.9 7.7 7.7 8.7
MOLSI - - - 10.1 7.4 3.8 - - - - - 6.2 0.5 - - -
- 0.3 - 10.7 11.7 3.3 0.3 - - - - 10.6 3.6 - 6.7 -
- 0.6 7.7 11.8 0.8 5.3 - - 5.5 6.1 - - - 7.1 11.1 1.7
- 1.1 6.2 10.7 0.9 5.5 - 0.5 3.5 0.6 - - 1.5 3.3 7.2 -
OCHPA 9.5 10.1 12.2 3.1 1.1 - 7.4 4.3 6.9 11.5 10.5 6.6 3.9 8.6 - 9.0
SCHHA 1.9 8.1 - 6.0 - - 7.8 7.1 4.7 3.6 - 6.1 1.1 - 1.5 -
SLAST 6.7 3.8 10.2 6.5 6.0 - 2.3 - - - - 3.2 - - - -
STOEN 7.0 10.8 - 5.5 - - - - 10.6 10.7 10.9 11.8 8.0 7.2 4.4 7.9
5.6 9.0 10.4 5.1 - - 1.0 - 10.8 11.0 8.1 8.5 2.6 7.0 1.8 6.8
5.4 9.6 10.8 4.6 - - 1.6 - 10.6 11.0 11.0 10.1 3.9 9.9 4.5 8.9
STRJO 2.3 5.2 4.3 8.9 10.3 7.2 - 1.1 - 2.0 - - 2.1 - 7.5 -
- - - 6.8 8.2 9.0 - 1.0 - 2.1 - - 0.7 - 5.3 -
2.6 6.8 4.6 10.5 11.3 7.3 - 1.7 - 3.6 - - 3.0 - 7.7 -
TEPIS - - 4.0 - - - - - - - - - - - 7.2 -
YRJIL - - - - - 1.2 - - - - - - - 12.2 - 9.8
-------------------------------------------------------------------------------------
Sum 149.3198.5192.3181.4149.4 79.9119.0 75.5160.9152.3134.4168.1 65.9121.8112.0129.7
3. Results (Meteors)
====================
Oct 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
--------------------------------------------------------------------------------
BENOR - 6 - - 10 8 - - - - 10 11 10 8 15
4 - 5 16 - 9 19 - - - - - - 6 5
BRIBE 10 21 1 38 - - - 45 2 - 4 30 45 52 29
CASFL 9 8 7 - - - - - - - - - - - -
18 8 13 - - - - - - - - - - - -
CRIST 31 37 8 18 - - - 2 - 50 7 58 84 68 67
39 29 5 9 - - 5 1 2 15 7 31 44 36 27
ELTMA - 11 23 7 - - - - - - - 52 36 - 60
GONRU 28 49 12 1 - - 1 32 52 6 74 60 68 93 79
13 14 12 - - - 1 22 34 21 26 35 22 50 43
GOVMI - 10 33 28 - 1 - 6 1 - 2 - 44 - 21
HERCA 10 9 - 3 2 - - - 14 3 3 12 8 16 22
19 26 - 16 4 - 2 - 21 6 7 17 16 32 28
HINWO - - 10 1 - - 7 - - - - - - - -
JOBKL 24 - - - - - - 50 - 22 48 65 - 131 27
KACJA - - 17 16 5 4 25 5 - - - - - 5 -
- 1 6 17 4 2 11 2 - - - 21 33 7 37
- - - - - - - - - - - - - - -
KOSDE - - - 4 - - - 17 - - - - - - -
LUNRO 76 52 39 - - 24 10 18 24 - - - - - 109
MOLSI 5 46 57 58 - - - - - - - - - - -
2 30 34 38 6 10 3 - - 17 - 9 30 5 -
7 10 4 30 1 1 1 18 12 - - 24 34 1 -
15 2 2 36 - - 2 4 34 - - 8 7 - -
OCHPA - - 5 - 15 4 - 2 3 11 - 42 31 46 49
SCHHA 17 16 - 12 - - - 28 - - - 12 26 19 14
SLAST - 3 - 11 - - 6 2 - - - 10 28 6 17
STOEN - 15 22 19 11 4 - 2 - - 19 115 73 74 79
- 4 11 4 12 7 - - - - 5 47 40 55 59
- 17 35 17 23 14 - 2 - - 11 118 61 89 104
STRJO 4 1 - 19 - - - 26 6 - 4 3 18 30 28
3 - - 25 - - - 17 5 - - 2 25 23 16
7 - - 38 - - - 22 14 - - 9 67 40 18
TEPIS 7 14 25 26 - - 31 - - - - - - - -
YRJIL 23 57 - - 18 22 26 27 51 77 4 - 68 78 -
--------------------------------------------------------------------------------
Sum 371 496 386 507 111 110 150 350 275 228 231 791 918 970 953
Oct 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
-------------------------------------------------------------------------------------
BENOR 12 24 28 35 32 21 37 22 13 3 - 10 4 - - -
5 4 4 8 6 - 1 8 - 14 3 - 4 10 - -
BRIBE 34 42 9 83 26 6 16 53 3 46 - 38 - - - -
CASFL 38 54 55 38 4 - 44 5 28 56 37 28 16 - - 26
48 60 70 55 10 - 69 18 43 78 49 26 7 - - 41
CRIST 30 51 122 8 - 2 3 163 59 115 95 - 2 65 33 29
21 19 59 4 - - 1 37 6 41 6 2 - 8 2 11
ELTMA 43 74 90 40 11 - 11 - 87 77 54 46 - - - -
GONRU 74 88 100 - 47 - 86 - 85 3 67 85 4 24 17 -
48 37 76 - 31 - 63 - 49 13 40 43 15 6 12 2
GOVMI 9 - - - 104 12 32 - 2 - 13 - 4 5 7 20
HERCA 24 24 31 16 70 87 77 63 65 16 37 32 - 15 15 18
41 31 26 25 74 79 80 79 89 21 56 52 - 22 22 28
HINWO - - - 112 114 22 91 - - - - 53 50 - - 5
JOBKL 29 70 28 105 - - 117 56 97 - - - - 54 - -
KACJA - 2 - - 69 - - - - - - 22 - - - 30
28 32 57 52 48 - 45 - 2 - 3 6 1 6 - 6
- - 75 - - - - - - - - - - - - -
KOSDE - 18 - - - - - 10 17 - - - - - 1 -
LUNRO 112 83 59 - - 193 234 87 123 4 83 61 44 47 44 61
MOLSI - - - 338 155 62 - - - - - 82 3 - - -
- 1 - 138 69 11 2 - - - - 37 6 - 40 -
- 2 43 116 2 55 - - 24 23 - - - 55 51 7
- 3 13 30 2 25 - 2 9 2 - - 3 5 16 -
OCHPA 50 52 93 7 1 - 77 24 33 76 59 21 8 46 - 39
SCHHA 11 33 - 62 - - 62 59 29 20 - 28 5 - 6 -
SLAST 11 9 32 19 13 - 5 - - - - 6 - - - -
STOEN 43 132 - 80 - - - - 149 168 108 68 15 94 27 43
22 64 90 42 - - 2 - 99 83 55 22 5 36 5 22
46 167 194 106 - - 5 - 173 167 93 63 10 112 21 60
STRJO 14 22 19 50 57 31 - 2 - 6 - - 4 - 18 -
- - - 39 64 59 - 3 - 10 - - 2 - 16 -
16 40 38 107 137 56 - 8 - 13 - - 9 - 38 -
TEPIS - - 9 - - - - - - - - - - - 22 -
YRJIL - - - - - 4 - - - - - - - 88 - 55
------------------------------------------------------------------------------------
Sum 809 1238 1420 1715 1146 725 1160 699 1284 1055 858 831 221 698 413 503
Sirko Molau, 2009/12/03