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Quadrantids Jan 03-04 2006
Long time-base plot of activity
Initial analysis shows a strong peak centered on around 05:00 utc on Jan
4th. Closer inspection shows quite elevated meteor rates during the
afternoon of the 3rd, but no significant increase around the expected peak
time of 18:20 utc. Note the steady diurnal change pattern on the days
before and after the peak. This was used to advantage during the following
The 1st graph below shows the average meteor rates for two days on each side of
Quadrantids peak, not including the shower itself. This was used as the
baseline for the two graphs following it. The data used was my 10 minute count data. The vertical scale is the inferred hourly rate (10 min count x 6)
The "average" rates above (which could be argued to be a
rough "sporadic background rate") were subtracted in turn from the data for the 3rd and 4th, to produce the
following two graphs of "variation from the average".
The significant rates above the zero line should, in theory, be mostly
caused by Quadrantids. Despite increased rates during the afternoon of the 3rd, there was no
significant peak at the expected peak time of 18:20utc. Instead, maybe due to geometry between
myself and my transmitters, a broad peak was seen between 01:00 and 09:00 utc
on the 4th.
Comments welcome by email, or in the MeteorObs forum.
This report was posted to IMO-NEWS at YahooGroups
20 FEB 2005 09:55:20 UTC
Timing confirmed by Radio Obs - see below.
IMO-News mailing list <email@example.com>
From: Andri Knvfel <andre.knoefel@[address
Date: Sun, 20 Feb 2005 18:10:30 +0000
Subject: [IMO-News] Daylight Fireball over the UK
In the last hours I received some reports of a daylight
fireball in the UK.
Time: 09:55...09:58 UT
reports from Richard White - Monmouth (Wales)
Ian Sleight - Stafford
Stephen Burt - Stratfield Mortimer (West Berkshire)
Karl Hibbert - Dunkeswell (Devon)
Peter Thomson - Bovey Tracey (Devon)
Path from south to northwest
"Bright sunny morning, blue
sky, when something caught my eye out of the window.
An extremely bright trail, white like magnesium with sparks in its
yellow and blue."
"I was talking on my mobile
phone and looking in the western sky approximately 280 degrees
towards some Poplar trees when I saw a large blue-green object
with a white core travel towards 290 degrees the events lasted
about 4 seconds. Starting elevation approx 35 degrees finishing
elevation 30 degrees. Speed approximation = medium."
"A few seconds before 0955 UTC
today, Sunday 20 February I saw what appeared to be a very bright
daylight fireball streak low across the western sky. It first
caught my eye as a flash of green, and for an instant I thought it
was a flash of sunlight off a turning aircraft. It brightened and
moved very rapidly and developed a short intensely bright vividly
iridescent green trail. It lasted no more than 2 seconds, maybe 3.
The trail started about 250a azimuth and ended at
270-275a, at an elevation of perhaps 6-8degrees above the
"Very visible in bright
sunshine, incredible colours as it broke up,never seen anything
like it in my life."
"Object appeared brilliant
against clear blue sky in bright sunlight. Fragments were also
brilliant and clearly separated. No trail of any sort visible in
sky after event. Another witness confirmed colour as blue green
and very bright."
Fireball Data Center
International Meteor Organization
witnessed event was observed by this Radio Observation site.
The image below shows a strong reflection starting at approx 09:55:20 UTC,
with the trail lasting for ~1.5 minutes.
10 Oct 2004 21:02 utc
Possibly part of the Orionids shower, this fireball was seen via signal reflection by myself.
I am awaiting reports from other observers. The upper signal is reflection from the
RTL Klub transmitter in Hungary (59.257 MHz), and the lower two
are SVT-1 Sweden - bottom, and TVE-1 Spain - middle (both 48.250MHz)
11 Oct 2004 15:52 utc
On the following afternoon I captured this impressive fireball signal.
Note the initial Doppler trace of the head of the meteor in the upper
lasting a few 1/100ths of a second, followed by the long trail reflection.
(Ignor the gently slanting line prior to the main reflection - this is
12 Jul 2004 22:32 utc
(reported event time unconfirmed as ~00:15 Finland time, or ~22:15 utc)
FIREBALLS OVER GULF OF BOTHNIA
Read news reports in Finnish and see images
here, and here
I captured the following image here in Plymouth. This was 15 minutes after
the observed events over Finland, so therefore it is not the same meteor.
This is a picture of a meteor smoke trail, taken from this Swedish
The Swedish report is translated here by Pekka Savolainen,
as posted to the MeteorObs mail-list (but spelling error corrected!):
"Never before have I experienced a phenomenon like
this", said the chief of the sea-rescue in Vasa
Night to Tuesday red balls of light was observed over the southern part of the Bay of Botnia.
"During the night before Tuesday (...13th July 2004...) emergency services and sea-rescue
received around 10 calls from people who believed they had seen emergency flares or something like it in the waters between
Jakobsstad and Karleby Sea-rescue estimate it that it was a meteor shower and not a vessel in
The reports came in to the emergency operators during approximately an hour. Three people
described the phenomenon exactly the same way and authorities believes based on this that it was
a meteor shower.
"I have worked here for nineteen years and not once have I experienced a phenomenon like
chief of the Vasa sea-rescue central Peter Sundell said to FNB. Johanna Aarnio saw the
phenomenon in the Larsmo archipelago. "The light I saw was large and bright but not red in color.
First it flew pretty straight across the sky, then it lost a little altitude and finally fell down in a
spiraling contrail. Before it disappeared it was as if it had blown up; first it was bright, then fainter
and seemed to have fallen into the sea. No sound was heard", said Aarnio who was in the
archipelago with some friends.
A photographic society on a summer excursion to the Valsörs also observed the phenomenon and
suceded in taking a few pictures somewhat after midnight on the night before
Tuesday. According to
Johan Geisor the phenomenon lasted for a few minutes.
"First I thought it was an aeroplane but as it moved across the sky we saw that it was something
else", he says. The pictures the party had taken was received
with great interest by the Ursa
astronomical society. According to the society's papers' editor Marko Pekkola the picture seems to
show meteor trails in the sky, something that according to him is a rare phenomenon in Finland.
is with some probability that it is not large pieces we are talking about in this case. In most cases
meteor fragments fall down in the size grains of sand", he says.
"More thorough mathematical
calculations are needed to say exactly how large the meteorite or meteorite trails where. If the
meteorite is made out of iron it can act as a spectacular sight in the sky while it in reality is much
smaller then one would think", he says.
Marko Toivonen, who is responsible for the meteorite section at Ursa
considers the Bay of Bothnia
meteorite to be an unusually large meteor.
Since the light intensity of a meteor is directly proportional to the size of the ball Toivonen suspects it
to have been a meteorite with a diameter or up to 2 meters. But more
probable is that it was more
in the size of a soccer ball. It was not a question of space junk - the objects trajectory was all too
straight to have come from something out of orbit.
Patrik 'Putte' Henriksson
17 Mar 00:55 utc
Meteor (reported as a fireball) on the Internet in the following message
and observed at my station in the following dramatic image, and by Dave
in Christchurch (240km east), and Chris Heapy in Macclesfield (~300 km
The visual observer, Lilian Hobbs, was believed to be in Southampton, ~200
km east of me.
Lilian <Lilian.Hobbs@nospam.dsl.pipex.com> writes
Did anyone else see the fireball at 00:55 tonight. I was just going out to
move my dome when this fireball headed down through Gemini. It was so bright
that it left a trail which lasted a few seconds. Its been a long time since
I have seen one that bright.
From the visual observers'
point of view in Southampton, the fireball was reported to be
seen passing "down" through Gemini. Here is the star field from
that point of view.
Star map from SkyChart
At 00:55 utc on March 17th 2004, Gemini was at an 274° Azimuth, 25°
or basically west of the observer. "Down", to me, would indicate
a westerly heading
for the fireball. A very rough triangulation would put it descending
towards Hartland point.
16 Mar 2004 20:17 utc
Meteor reported on the Internet via this report in the uk.sci.astronomy
newsgroup as follows:
Subject: Meteorite tonight
From: John Hirst <John.Hirst7(at)ntlworld.com>
Date: 16 March 2004 21:34:09
My first post on this NG, so please be kind..
Tonight at around 20:15 GMT, I saw a very bright object fairly low in the sky travelling from the NE
towards the South, parallel to the horizon. As it tracked southwards it began to break up and
produce around 5 trailing bright particles. All of this took around 6 seconds from my first seeing it.
There were no clouds this evening. My point in this post is to say that I have never seen such a
bright object move across the sky before, although I have witnessed many meteorite and Leonid
showers, over the last few years, but this was more spectacular than all of these. I live in Dorset,
Did anyone else observe ?
The fireball appears to
have been captured here in Plymouth in this radio observation
using HROFFT. Note the high initial Doppler shift as the meteor
first entered the atmosphere, then the long reflection as the
ionization trail dissipated. The delayed reflection from the Portuguese
transmitter would tend to agree with the report that the meteor
was traveling in a north-south direction.
Dave Swan also captured this event in the
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