(meteorobs) Meteor phenomenon and bodies
Rich Smith
richsmith_ at hotmail.com
Tue Oct 11 04:03:43 EDT 2011
Managed to download and use with no problems into iBooks on iPhone4, had problem downloading to windows however, will try again later on
Regards
Rich Smith
Dorset UK
> From: meteorobs-request at meteorobs.org
> Subject: meteorobs Digest, Vol 5, Issue 17
> To: meteorobs at meteorobs.org
> Date: Mon, 10 Oct 2011 21:37:37 -0400
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> Today's Topics:
>
> 1. 248 Draconids from Northern Germany (LANMA results)
> (Marco Langbroek)
> 2. Re: Draconid radiant position? (Esko Lyytinen)
> 3. (Meteorobs) Next Artificial meteor (drobnock)
> 4. Draconids: population index & ZHR (Geert Barentsen)
> 5. Re: Draconids peaking radio wise! (Chris Steyaert)
> 6. Re: METEOR PHENOMENA AND BODIES (Alex SV1NZX)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 10 Oct 2011 22:27:37 +0200
> From: Marco Langbroek <marco.langbroek at wanadoo.nl>
> Subject: (meteorobs) 248 Draconids from Northern Germany (LANMA
> results)
> To: Meteorobs NAMN <meteorobs at meteorobs.org>
> Message-ID: <4E935539.3030004 at wanadoo.nl>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi all,
>
> Just back from observing the Draconid meteor outburst from Sleswig-Holstein,
> N-Germany. From a field near a small hamlet called, very suitably, "Dunkelsdorf"
> ("darkvillage"). What a nice show we saw, even with the moon!
>
> We had a very transparent and clear sky with nothwithstanding the moon a
> limiting magnitude (me personally) of +6.3 and visible milky way up to Perseus.
>
> I observed looking north with my back to the moon. Counted 248 Draconids (plus
> 24 sporadic meteors) in 2.77 hours effective observing time. During the peak
> moment at about 20:04 UT, I saw 3-4 Draconids per minute for a short while. Most
> were faint. My data suggest a peak ZHR of about 250.
>
> As supporting part of the 2011 Draconid Airborne Mission, Peter Jenniskens
> (SETI/NASA-Ames) and us (Carl Johannink and me, DMS) set up a multi-station
> effort with video units situated 91 km apart using two of Peter's CAMS systems.
>
> While we formed the "remote" post at Lebatz/Dunkelsdorf, Peter manned the
> primary post at K?hlungsborn (German Baltic coast), 91 km east of us, as a
> guest at the Leibniz Institut f?r Atmosph?ren Physik (IAP).
>
> Michael Gerding (IAP) meanwhile operated the IAP Potassium LIDAR at the primary
> site. They tried to detect meteor debris/ionization trails at 95 km altitude
> with the LIDAR, trails from the same meteors that we simultaniously filmed. Very
> impressive to see this massive laser beam in operation the night before
> (test-run), when we were too still at K?hlungsborn (we relocated 91 km westwards
> the day of the maximum, picking the location for our secondary station based on
> the latest weather prospects). A picture of the LIDAR beam I shot that
> night-before can be seen here: http://draconids.seti.org/ (scroll down a bit
> on the page).
>
> Preliminary multistation results on 28 Draconid meteors, yielded a geocentric
> radiant at RA 262.8, dec +55.5 degrees (apparent radiant at about RA 267, +57.5,
> changing a bit over the night due to zenith-attraction). It could have been
> more, were it not that (unlike us - we had a crystal clear sky and filmed
> hundreds of meteors) K?hlungsborn suffered from cloud fields during parts of the
> period.
>
> I wish to warmly thank Dr Michael Gerding and his team at the IAP for their
> hospitality in K?hlungsborn. It was a great experience!
>
> - Marco
>
>
>
> night 2011-10-08/09
> begin 2011-10-08 1845
> end 2011-10-08 2200
> observer "Marco" "Langbroek" "LANMA"
> location 10 35 42 E, 53 58 33 N
> site "Dunkelsdorf" "Germany"
>
>
> // Interval (UT) RA Dec Teff F Lm GIA SPO
> period 1845-1850 000 +80 0.083 1.00 6.40 C 5 C 1
> period 1900-1910 000 +80 0.167 1.00 6.40 C 9 C 3
> period 1910-1925 000 +80 0.167 1.00 6.30 C 11 C 1
> period 1925-1935 000 +80 0.167 1.00 6.30 C 19 C 0
> period 1935-1945 000 +80 0.167 1.00 6.30 C 11 C 1
> period 1945-1957 000 +80 0.200 1.00 6.30 C 17 C 2
> period 1957-2010 000 +80 0.217 1.00 6.30 C 41 C 2
> period 2010-2019 000 +80 0.150 1.00 6.30 C 27 C 1
> period 2022-2035 000 +80 0.217 1.00 6.30 C 20 C 4
> period 2035-2050 000 +80 0.217 1.00 6.30 C 25 C 1
> period 2050-2100 000 +80 0.167 1.00 6.30 C 11 C 2
> period 2100-2110 000 +80 0.167 1.00 6.30 C 13 C 1
> period 2110-2115 000 +80 0.083 1.00 6.30 C 3 C 1
> period 2124-2142 000 +80 0.300 1.00 6.30 C 21 C 2
> period 2142-2150 000 +80 0.133 1.00 6.30 C 8 C 1
> period 2150-2200 000 +80 0.167 1.00 6.30 C 7 C 1
>
>
> // Show Interval -6 -5 -4 -3 -2 -1 +0 +1
> +2 +3 +4 +5 +6 +7 Tot
> distribution GIA 1845-2200 - - - - - 1.0 4.0 13.0
> 53.0 104.0 73.0 - - - 248.0
> distribution SPO 1845-2200 - - - - - - - 1.0
> 5.0 12.0 6.0 - - - 24.0
>
> // Personal comments
> Very transparent sky, milky way visible up to Perseus nothwithstanding moon.
> Looking north, away from moon.
>
>
>
> ------------------------------
>
> Message: 2
> Date: Mon, 10 Oct 2011 20:26:56 +0000
> From: Esko Lyytinen <esko.lyytinen at jippii.fi>
> Subject: Re: (meteorobs) Draconid radiant position?
> To: Meteor science and meteor observing <meteorobs at meteorobs.org>
> Message-ID: <4E935510.7080107 at jippii.fi>
> Content-Type: text/plain; charset=ISO-8859-15; format=flowed
>
>
> Hi all,
>
> We here in Finland video meteor data have the geocentric radiant just
> where it is expected to be.
> I think that the eplanation is at least in part, maybe totally, the
> zenith-attraction that you maybe have not taken into account. This can
> shift the radiant for several degrees, more or less correcting that "error".
>
> Regards,
> Esko
>
> > Hi Sirko,
> >
> > I also observed this. I attached the HULUD1 tracing plot (all meteors).
> >
> > Regards,
> >
> > Erno Berko, Hungary
> >
> > ----- Original Message ----- From: <sirko at molau.de>
> > To: "IMO-Network" <imo-network at yahoogroups.com>; "IMO-News Mailing
> > List" <imo-news at yahoogroups.com>
> > Cc: "Meteorobs Mailing List" <meteorobs at meteorobs.org>
> > Sent: Monday, October 10, 2011 10:01 PM
> > Subject: (meteorobs) Draconid radiant position?
> >
> >
> >> Folks,
> >>
> >> upon analysing my Draconid observations I found a significant shift
> >> between the expected and observed radiant position. The expected
> >> position (according to the IMO Meteor Shower Calendar 2011) is
> >>
> >> alpha = 262?, delta = 54?, v_inf = 20km/s
> >>
> >> However, the radiant I get from 200 Draconids, recorded by AVIS2 between
> >> 18:15 and 21:15 UT, is
> >>
> >> alpha = 277?, delta = 54?, v_inf = 20 km/s
> >>
> >> That is, the deviation is exactly one hour in right ascension. Can that
> >> be confirmed by other video observers?
> >>
> >> Best,
> >> Sirko
> >
> > ------------------------------------------------------------------------
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > meteorobs mailing list
> > meteorobs at meteorobs.org
> > http://lists.meteorobs.org/mailman/listinfo/meteorobs
> >
>
>
>
> ------------------------------
>
> Message: 3
> Date: Mon, 10 Oct 2011 17:18:02 -0400
> From: drobnock <drobnock at penn.com>
> Subject: (meteorobs) (Meteorobs) Next Artificial meteor
> To: "meteorobs at meteorobs.org" <meteorobs at meteorobs.org>
> Message-ID: <4E93610A.2E908AAF at penn.com>
> Content-Type: text/plain; charset=us-ascii
>
> Next Artificial meteor
>
> Before the end of this year 2011, an other artificial meteoroid - the
> German Satellite ROSAT is predicted to renter the earths atmosphere in
> October or November 2011. The current scatter fields and on land visible
> entry point is predicted to be in Canada.(CTV Ottawa)
> http://ottawa.ctv.ca/servlet/an/local/CTVNews/20111008/german-rosat-satellite-plunge-canada-potential-impact-zone-111008/20111008/?hub=OttawaHome
>
> According to Scripps TV Station Group :
>
> "Generally speaking, whenever a satellite re-enters the atmosphere,
> about 20 to 40 percent of its mass (estimated English tonnage 2.5 tons)
> actually reaches the Earth's surface," Heiner Klinkrad, the German
> Aerospace Center's senior space debris expert, said in a statement . "In
> the case of ROSAT, this figure could be slightly higher because one of
> its characteristic features is that it carries heat-resistant mirror
> structures on board."
> Read more:
> http://www.wptv.com/dpp/news/local_news/water_cooler/germany's-roentgen-satellite-set-to-crash-in-the-coming-weeks#ixzz1aPg7QnP6
>
> ROSAT Tracking "realtime"
> http://www.n2yo.com/satellite/?s=20638
> http://www.infosatellites.com/rosat-satellite-tracking-norad-20638.html
> http://www.ukweatherworld.co.uk/forum/index.php?/topic/86742-rosat-satellite-re-entry/page__pid__769402#entry769402
>
> Why bother with the incoming midden field ? Please see the following
> from 1946 and 1953:
> http://calteches.library.caltech.edu/144/1/Zwicky.pdf
> and
> http://articles.adsabs.harvard.edu//full/1946PASP...58..260Z/0000260.000.html
>
> And of course additional research for VLF signature(?) capture.
>
> George John Drobnock
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sun, 9 Oct 2011 20:41:19 +0100
> From: Geert Barentsen <geert at barentsen.be>
> Subject: (meteorobs) Draconids: population index & ZHR
> To: imo-news at yahoogroups.com, meteorobs at meteorobs.org,
> Jeremie.Vaubaillon at imcce.fr, petrus.m.jenniskens at nasa.gov,
> william.j.cooke at nasa.gov
> Message-ID:
> <CAHy_qcDdkr5uvd4fCW7be4BtTLUTZgfnX_nmAe6=pQd-LqRBNA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> All,
>
> Based on 2164 Draconid magnitudes reported to the IMO by visual observers, I
> computed a population index of:
>
> r = 2.8 +/- 0.05 (for October 8, 16h00-24h00 UT).
>
> This suggests that the Draconid outburst consisted mainly of faint meteors,
> as expected. The visual graph at www.imo.net has now been updated to take
> this value into account. This has the effect of raising the peak ZHR from
> ~350 (under the previous assumption of r=2.6) to ZHR ~400 (assuming r=2.8)
> near 20h00m +/- 10m UT. However, it must be made clear that absolute values
> for the ZHR are known to be uncertain during periods of full moon, perhaps
> by up to +/- 50%.
>
> Nevertheless, it appears that the observations match the predictions in a
> very impressive way. Congratulations to all involved!
>
> The magnitudes required to compute the population index are available in
> machine-readable format at the bottom of:
> http://www.imo.net/live/draconids2011 .
> The computation method used is described in (Arlt et al. 2003):
> http://adsabs.harvard.edu/abs/2003JIMO...31...77A
>
> Best wishes,
> Geert
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> ------------------------------
>
> Message: 5
> Date: Sun, 09 Oct 2011 22:07:04 +0200
> From: Chris Steyaert <csteyaert at gmail.com>
> Subject: Re: (meteorobs) Draconids peaking radio wise!
> To: meteorobs at meteorobs.org
> Message-ID: <6.2.5.6.2.20111009220537.02ec6f48 at gmail.com>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> Fortunately most radio observers have the time of the outburst right :-)
>
> See http://www.rmob.org/livedata/main.php
>
>
> Chris
>
>
> At 14:36 09/10/2011, Paul Goelz wrote:
> >At 02:59 PM 10/8/2011, you wrote:
> > >Even with limited analogue TV here in Canada rates are high now!!! Will take
> > >them :)
> > >
> > > Am listening for another 3 hours then if clear see if I can see any...
> >
> >I captured a series of 30 minute spectrograms yesterday on 55.239 MHz
> >(USB) from the northern suburbs of Detroit and put them together in a
> >panorama covering the period between about 1800 and 2130 UTC. Times
> >along the bottom edge are UTC and run left to right. The whitish
> >vertical features are a joining artifact of the panorama program I
> >used (easier than trying to hand stitch them).
> >
> >Here's a link to the panorama. This is a 1.1MB file.
> >
> >http://www.pgoelz.com/stuff/Draconids%2010-8-11.jpg
> >
> >By eye, the peak appears to be about 2015 or 2020 UTC.
> >
> >If anyone is interested in more data, I actually started the captures
> >several hours before that and they are still running. The originals
> >are BMPs and slightly better resolution than the panorama JPG.
> >
> >Paul
> >
> >
> >Paul Goelz
> >Rochester Hills, Michigan USA
> >pgoelz at comcast.net
> >www.pgoelz.com
>
>
>
> ------------------------------
>
> Message: 6
> Date: Mon, 10 Oct 2011 18:57:30 +0200
> From: Alex SV1NZX <sw1nzx at gmail.com>
> Subject: Re: (meteorobs) METEOR PHENOMENA AND BODIES
> To: Meteor science and meteor observing <meteorobs at meteorobs.org>
> Message-ID:
> <CANoV8jSKuTSnwEq1UqY9H14qJCgdmKwMOhmgF5nMdBvRnGbesQ at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello
>
> I opened it without problems at home and work. Used Chrome, if that is any
> help to you guys
>
> Best regards,
> Alex
>
> On Mon, Oct 10, 2011 at 6:21 PM, Chris Peterson <clp at alumni.caltech.edu>wrote:
>
> > A quick search on the Astrophysics Data System reveals that this paper
> > is not in the public domain. Of course, papers like this end up on
> > university servers all the time. In this case, nothing is actively
> > trying to subvert downloads. Looking at the PDF metadata shows that the
> > version is old and the creation software a bit non-standard. No doubt
> > that is giving some people's reader software problems. That's all.
> >
> > Chris
> >
> > *******************************
> > Chris L Peterson
> > Cloudbait Observatory
> > http://www.cloudbait.com
> >
> > On 10/10/2011 10:07 AM, Ed Majden wrote:
> > >
> > > On 9-Oct-11, at 11:58 PM, danny garvin wrote:
> > >
> > >> I have the same issue the link won't open
> > >>
> > >
> > > This is odd, I just tried the link and it worked fine on my Mac. I
> > > beginning to think that is may be an unautherized listing by someone.
> > > Perhaps they are trying to prevent this from being downloaded. Not all
> > > stuff on the internet may be public domain.
> > > Ed
> >
> > _______________________________________________
> > meteorobs mailing list
> > meteorobs at meteorobs.org
> > http://lists.meteorobs.org/mailman/listinfo/meteorobs
> >
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