[meteorite-list] Russian meteor: Stefan Geens' research updates - VIDEO

From: karmaka <karmaka-meteorites_at_meteoritecentral.com>
Date: Sat, 09 Mar 2013 16:12:19 +0100
Message-ID: <1UELRb-3og9tQ0_at_fwd54.aul.t-online.de>

Dear list members,

Stefan Geens compares different calculated trajectories
of the Chelyabinsk meteor in this video:

http://www.youtube.com/watch?v=lmjawUCkO84

Keep up the great work, Stefan!

Martin
 
 
 
Von: Robin Whittle <rw at firstpr.com.au>
 An: METEORITE LIST <meteorite-list at meteoritecentral.com>
 Betreff: Re: [meteorite-list] Russian meteor: Stefan Geens' research updates - part 5
 Datum: Sun, 24 Feb 2013 03:46:21 +0100
 
More from the email updates for Stefan Geens':
 
 http://ogleearth.com/2013/02/reconstructing-the-chelyabinsk-meteors-path-with-google-earth-youtube-and-high-school-math/
 
 followed by my rambling at the end.
 
 People comment on the site but their comments are held in a moderation
 queue and may only be visible to them (with a message about awaiting
 moderation) until the message is approved by Stefan. For instance, I
 wrote a comment about the location of the Emanzhelinsk video with a 90
 sec shock wave delay. My comment hasn't yet appeared in the updates, or
 I guess on the site itself, which has multiple pages for all the
 comments. However, an email update did arrive since I sent this, based
 on a comment which someone would have made earlier, giving the precise
 location of the same video and a probably more accurate 89.5 second time
 delay measurement.
 
 As I already wrote to the list:
 
 http://www.webalice.it/mizar02/articoli/Meteorb.dat
 
 Electronic Telegram No. 3423
 Central Bureau for Astronomical Telegrams
 INTERNATIONAL ASTRONOMICAL UNION
 
 TRAJECTORY AND ORBIT OF THE CHELYABINSK SUPERBOLIDE
 Jiri Borovicka, Pavel Spurny, and Lukas Shrbeny, Astronomical
 Institute of the Academy of Sciences, Ondrejov, Czech Republic . .
 
 
 Venus Explorer pointed to two very high resolution images of the fresh
 smoke trail from an aircraft.
 
 I have found approximate position of photo from the plane
 
 http://img-fotki.yandex.ru/get/4138/93431414.5b/0_a3d16_e6f01d1b_orig
 
 Coordinates: 55.571143677 N, 63.130811893 E, Altitude 11000, View
 Azimuth 223.52
 
 The another photo from plane without signs from
 
 http://forums.airbase.ru/2013/02/t87595,16--padenie-meteorita-15-fevralya-2013-goda-na-urale.html#p3067641
 
 were made at approximately at 55.46314430, 62.614714374, Alt 10000,
 View Azimuth 228
 
 If you click on the images from the airbase.ru page, and then use your
 browser's zoom in command to expand the image to full resolution, you
 will see one part of the smoke trail which has assumed something of a
 mushroom cloud shape. Below this cloud, the rising hot air in the cloud
 has brought in fresh cool air from below, so there is a vertical kink in
 the smoke trail at this point. After this, to the west, the smoke trail
 is smaller and shorter. So I guess the object really broke up at this
 point, with some larger pieces continuing as in the videos I have
 previously mentioned. I guess smaller bits of debris might slow down
 very rapidly and fall almost vertically from a breakup like this.
 
 
 Dmitry DD wrote:
 
 Serge, you can use this video from Troitsk, too:
 http://youtu.be/6TYV4EQvz2w Observation angle is measurable by
 object/shadow proportion, delay is about 5 minutes(!), detected
 by the first cam vibrations. Coordinates: 54?2?26.72?N,
 61?38?59.18?E.
 
 
 Serge had already found the location of the Emanjelinsk video I
 mentioned on the list:
 
 For ssvilponis sound map:
 
 http://krasview.ru/video/342138-METEORIT_15_02_2013g_Chelyabinsk_Chel.obl._g.Emanjelinsk.
 
 The only video I could find south of the trajectory. It started at
 54.75587 N, 61.30517 E and unfortunately it was cut in the middle
 while the car was moving. I think at the end the car was parked
 facing NW at one of the building not that far away . . .
 
 I was confused by the lines on ssvilponis? sound map
 http://goo.gl/pNxPh After I found Pervomaysky video, I see the
 Yemanzelinks dashcam video is fine. The explosion was above
 Pervomaysky. BTW I assumed the flash on the video is at 6:23,
 windows destroyed at 7:22.5, delay is 89.5. Also while you say the
 Korkino delay is 88 while ssvilponis maps says 89. Hopefully
 whoever does the final calculations will rectify the
 discrepancies.
 
 
 Steve wrote:
 
 For ssvilponis The Deputatskoye and Bereznyaki meteorites look real
 to me (amateur astronomer). It is very reasonable they are small
 pieces from the explosion south of Korkino blown south of the
 meteor path by winds. I think your landing zone should include
 them. Also, clearly from the videos, pieces landed all along the
 path before the vanishing point.
 
 I don?t know if there were meteorites found at Pustozerova, it is
 quite possible.
 
 I think the landing zone should extend from a little past Korkino
 to a little past Lake Chebarkul.
 
 
 
 My rambling:
 
 I don't know who "Serge" is, but he and "ssvilponis" are seriously on
 the case. I am not investigating anything in detail though I enjoyed
 tracking down the exact location of the Emanjelinsk video. There's an
 Estonian eBay user "ssvilponis". There is a user "Sulev Svilponis" at
 http://www.flickr.com/people/svilponis/. "ssvilponis" has maps regarding
 the meteor:
 
 https://maps.google.ee/maps/user?uid=216221265233140305376&hl=et&gl=ee
 
 I guess that with all these videos the Columbian researchers Jorge I.
 Zuluaga & Ignacio Ferrin will be able to narrow the uncertainties in
 their trajectory and therefore work back with much greater accuracy to
 the likely orbit the asteroid was on when it collided with Earth.
 
 
 There are some striking circumstances here. Firstly, if the asteroid
 had been on a very slightly different path, it could have missed the
 Earth or plunged more steeply into the atmosphere. Most random
 selections of the Earth's surface would not have been as highly
 populated as this, or so well served by surveillance cameras and
 dashboard security cameras. Some photos taken by proper hand-held
 cameras are remarkable too:
 
 http://marateaman.livejournal.com/27910.html
 
 
 http://forums.airbase.ru/2013/02/t87595,16--padenie-meteorita-15-fevralya-2013-goda-na-urale.html#p3067641
 
 The asteroid's atmospheric entry occurred when many people were awake,
 and moving around, but before there was bright sunlight. The sky was
 clear and there was snow all around. It was quite a shallow trajectory
 and so most of the energy was dissipated high up over several seconds,
 rather than punching down low much faster and harder, with a more
 concentrated atmospheric shock wave and, I guess, a greater and more
 concentrated impact of one or probably many fragments on the surface.
 
 Many people were injured by broken glass. There's no way we can protect
 against this. It would not be surprising if blasts such as this caused
 vehicle accidents or even train derailments. I guess an aircraft could
 have its wings broken by a blast such as this from above.
 
 There's no way an event as large as this could be so well observed
 without there being many injuries and much damage. Hopefully there will
 be no lasting disability from this. I haven't seen or looked for recent
 reports on people recovering from injuries.
 
 It has always been a philosophical position available in debates about
 life in general that we never know when a meteorite will land on our
 head and kill us. We would likely get little or no warning. Unless we
 lived underground, we have to accept this as a risk of being alive.
 
 Many of those who have been injured and terrorized by this meteor will
 no-doubt have a less detached philosophical position on this than I
 still do. I know the likelihood of this happening to anyone is very low
 and has not been increased by recent events. It is much less than many
 other methods of being killed or injured, such as an aircraft crashing,
 or a car crash. Many people suffered physical and emotional pain and
 injury from this meteor - and for some this burden will last for many
 years. If it could happen once it could happen again, so how could
 people really relax if they have been injured once by something like this?
 
 http://en.wikipedia.org/wiki/2013_Russian_meteor_event
 
 - Robin
 
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Received on Sat 09 Mar 2013 10:12:19 AM PST