Meteors

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Meteor observations: 1993

Date T.eff LM SHO SPO Total 1 Total 2 Nr.
session
Loc Fireballs (-3>) Remarks
01/02-01 4,62 6,2 16 43 59 15529 230 Har - -4 celcius!
02/03-01 5,08 6,5 76 53 129 15658 231 Har - -12 Celcius.
03/04-01 1,97 6,1 15 16 31 15689 232 Har - -6 Celcius
16/17-01 1,17 6,2 9 3 12 15701 233 Har - Delta Cancrid outburst?
22/23-02 3,10 6,3 2 15 17 15718 234 Har -
22/23-03 2,08 6,2 1 15 16 15734 235 Har -
26/27-03 1,52 6,3 2 15 17 15751 236 Har -
27/28-03 3,57 6,3 3 21 24 15775 237 Har -
28/29-03 2,26 6,2 2 12 14 15789 238 Har -
15/16-05 2,58 6,1 3 16 19 15808 239 Har -
08/09-08 5,88 6,4 40 31 71 15879 240 Rog -4 SPO
09/10-08 3,75 6,7 37 49 86 15965 241 Rog -
10/11-08 7,18 6,9 108 72 180 16145 242 Rog -4 SPO,-3 SPO
11/12-08 7,92 6,9 726 80 806 16951 243 Rog -8 + -3 KCG, -6, -5, 4x-4, 6x-3 PER Perseid outburst ZHR 400
12/13-08 3,42 6,0 83 23 106 17057 244 Rog -5, 2x -4 PER Clouds & mist
13/14-08 7,09 6,8 124 53 177 17234 245 Rog -3 PER
14/15-08 1,66 6,5 17 14 31 17265 246 Lar -
11/12-09 3,02 6,2 7 22 29 17294 247 Har -
18/19-09 1,22 5,8 2 8 10 17304 248 Har -
16/17-10 3,99 6,5 41 33 74 17378 249 Har -3 ORI Orionid outburst
17/18-10 7,76 6,6 139 69 208 17586 250 Har -5,-4,-3,-3 ORI Orionid outburst
18/19-10 5,03 6,5 62 40 102 17688 251 Har -3, -3 ORI
22/23-10 0,88 6,2 2 9 11 17699 252 Har -
16/17-11 1,10 5,8 2 9 11 17710 253 Har - Leonids
17/18-11 3,35 6,0 14 35 49 17759 254 Har - Leonids
18/19-11 2,42 6,1 6 20 26 17785 255 Har - Leonids
19/20-11 1,33 6,1 3 11 14 17799 256 Har - Leonids
11/12-12 2,75 6,2 14 15 29 17828 257 Har -
28 sessions 97,70 - 1554 804 2358 17828 257 3 28 3 outbursts observed

Locations:
HAR = Harderwijk, the Netherlands (52.2 north, 5.4 east)
LAR = Lardiers, France (43.5 north, 5.4 east)
ROG = Rognes, France (43.5 north, 4.4 east)

The year 1993 in images and words
1993 was an excellent year for meteor observations. After a successful Quadrantid campaign I saw a small possible outburst of the delta Cancrids.


Figure 1: ZHR of the delta Cancrid/Antihlion outburst 16/17 januari 1993.


Picture 1: meeting to prepare for the Perseids, july 1993 at Harderwijk.
Fltr: Romke Schievink, Reinder Bouma, Koen Miskotte, Ralf Mulder, Robert Haas, Peter van der Heijden, André Kluitenberg, Paul Bensing, Klaas Jobse, Marco Langbroek, Michiel van Vliet, Hans Betlem, Jerôme de Jong van Lier, Mark Olie, Peter Aneca, Felix Bettonvil, Erwin van Ballegoy, Niek de Kort, Carl Johannink, unknown person, Jacob Kuiper and Paul van Vliet. Not on this picture: Casper ter Kuile, Paul Roggemans and Urijan Poerink. Photo credits: Casper ter Kuile.

Early spring 1992 it was decided that the Delphinus team (then consisting of Robert Haas, Paul Bensing and Koen Miskotte) will work together with Casper ter Kuile and Marco Langbroek in Rognes, Provence, southern France to observe the expected third Perseid outburst. This as a part of a large DMS expedition. Koen has built a new camera array for this expedition assisted by Casper ter Kuile and Hans Betlem. This array consisting a ring of seven Canon T70 camera's aimed at a height of 55 degrees. Casper also built a new camera arrey with nine Canon T70 camera aimed ata height of 30 degrees. See picture below.


Picture 2: Camera's, lights (out), action! Koen, Marco and Casper. Photo credits: Robert Haas.



Picture 3: three bright Perseids during the famous Perseid 1993 outburst. Photo credits: team Delphinus.

And both new array's worked fine during the Perseid campaign. 11/12 august 1993: after a few hours of normal activity of the Perseids activity popped out reaching ZHR"s of 400 when dusk sets in. Wow, what a show: lots of bright meteors and fireballs were seen. 5 Minute counts with 25 Perseids.....
There was also some noticeble activity of the kappa Cygnids. Some very bright fireballs were seen and photograped.


Picture 3: bright kappa Cygnid of magnitude -8 in Delphinus. Photo credits: team Delphinus.

And then there was the surprise of 1993: the Orionids! To my surprise (and joy!) I observed during the night of 17/18 October 1993 high Orionid activity. Normally you can expect 5-8 Orionids an hour around this date when the radiant culminates, now I counted up to 25 Orionids an hour (ZHR about 30-35)! These rates are normal around the traditional maximum of this meteorstream around 22 oktober. Also strickingly were the high numbers of bright Orionids, normally Orionid meteors are often weak and seldom bright. Most bright Orionids had a blue/white colour.


Figure 2: ZHR graph of the Orionids during the night 21/22 oktober 1993. Normal ZHR around this solar longitude is ~10.

In 1993 I was also the latest person who observed meteors from the old watertower near Harderwijk. The last (short) meteorwatch was during the night 16/17 november (Leonids) Thanks to the increasing light pollution of the small city of Harderwijk we were forced to seek for a new observing site. It was a unique (and famous) location were we did many observations. Adios water tower , thanks for the beautiful memories!
For 1993 and subsequent years astronomers predicted elevated Leonid activity. I could observe the Leonids over four consecutive nights in 1993, but during these meteor sessions no increased Leonid activity was observed . Also observers from other parts of the world observed no increased activity of the Leonids was observed
. Read a full report on the Leonids.

Year