Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Speciality Forums >> Space Rocks

Pages: 1 | 2 | (show all)
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Chebarkul - Chelyabinsk Meteorite Videos
      #5693069 - 02/21/13 04:29 PM

I am combing through hundreds of YouTube videos to find the best examples of footage from the recent Russian Chebarkul meteorite fall.

My selection criteria are :

1) must be original, unedited footage with few/no cuts or mods.

2) no compilations or "best of" videos.

3) no soundtracks or silly distracting music.

4) preferably has sound to hear the explosions, or if no sound, then a good clear view of the bolide/trail.

I will be posting these videos today and tonight as I finish going through them. Here are some I have selected so far with notes for each.


Chebarkul Video #1 - http://www.youtube.com/watch?v=inPclE7RwFY

This one does not clearly show the bolide or trail at first. What it does show is the viewpoint of a man holding a video camera as he reacts to the explosions. He is standing under a large wall of glass panes and many of them shatter while he is taping. He ducks to avoid the falling glass and keeps taping the entire time. He then runs down the street to record the aftermath and confusion. He then tapes the bolide trail in the sky. This is one of the best examples of the event that I have screened so far out of many dozens of videos. It meets almost all of the stated criteria in spades.

Chebarkul Video #2 - http://www.youtube.com/watch?v=iCawTYPtehk

This video only shows the bolide and does not record the explosions. However, it provides a very clear view of the fireball as it travels the entire length of the sky. The viewpoint is a dashboard camera in a car sitting at a traffic light. Very good vantage point and a much better quality video than most of the other dashboard cams I have seen so far.

Chebarkul Video #3 - http://www.youtube.com/watch?v=b0cRHsApzt8

This is a short but sweet video, so to speak. It is less than 20 seconds. It shows someone who walked outside to film the bolide trail in the sky. The person holding the camera is then startled by the first explosion, which is very loud. Shaken, the person continues to film, until the second explosion is heard - at which point, the person becomes freaked out, runs for cover, and shuts off the camera. This one lets you hear the first two fragmentation events very clearly and you get to experience the surprise and panic of the camera-person, albeit briefly.

Chebarkul Video #4 - http://www.youtube.com/watch?v=efvP-RRuJuA

This video I call "poor poopie" - because there is a startled dog involved. This one is a surveillance camera overlooking (downwards) a parking lot outside an apartment building. There is a few minutes of boring mundane footage showing pedestrians walking through or milling about. Just before the 01-25 mark (1 minute, 25 seconds), a small dog wanders into the frame with a man. While watching the bolide trail in the sky, the first explosion happens. What is interesting is how nonplussed the people are in reaction to this sudden unexpected explosion. It hardly startles the people, but the dog is clearly scared. Then, the second explosion happens and the dog gets spooked again. Afterwards, there are a few boring minutes of the people gawking around and dog appears to be OK. I selected this one because - the novelty of the dog and how it reacts in relation to the people and because it shows how casual the Russians are when presented with sudden loud explosions - apparently, it's nothing to get too excited about when the sky explodes without warning. LOL. If you don't want to get bored with this one, focus around the 1-minute and 25-second mark.

Chebarkul Video #5 - http://www.youtube.com/watch?v=b7mLUIDGqmw

This video is part 2 of a 5-part video. This part meets almost all of the selection criteria. You see and hear the explosions, the immediate reaction, and the confusion afterwards. You get a good feel for the confusion and chaos afterwards. Keep in mind, it is BELOW ZERO TEMPS outside during this event, and people run outside without coats, gloves, or other clothing. They run about, gawk, and discuss what just happened. If any of my friends can translate some of the Russian dialogue in this video, I would greatly appreciate it. What are they saying exactly? Do they think it was an attack? A meteor? A bomb?

Chebarkul Video #6 - http://www.youtube.com/watch?v=-9HkE2RztYY

This video is short, but interesting. It appears to be shot from inside a hotel room or apartment. There is a man and a woman, and one of them is standing next to the window, looking outside at the bolide trail in the sky. Suddenly, the first sonic boom rocks the room and the woman lets out a blood-curdling scream in surprise. I selected this video because it is one of the few examples of a Russian citizen reacting strongly to the explosion. In most videos, the average citizen appears very stoic and nonchalant about the blast.

I still have several dozen more videos to comb through and will post some more at a later time.


Sources : Google News Aggregator, YouTube Search, Dr. Nick Gessler's webpage, Robin Whittle's posts, and suggestions via Facebook, Twitter, and other social networking sites.

Dr. Gessler's excellent page - https://web.duke.edu/isis/gessler/meteorites/chelyabinsk.htm


Post Extras: Print Post   Remind Me!   Notify Moderator  
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5693102 - 02/21/13 04:42 PM

Two more videos :

Chebarkul Video #7 - REMOVED.

Chebarkul Video #8 - http://www.youtube.com/watch?v=Mp-CMWGQ9ag

This video is short, but clearly allows you to hear the initial blast and then several subsequent bangs/pops that may be more fragmentation events. It also shows a building as an upper-floor window is blown out and a cloud of debris pours out from the shattered opening.

Edited by Glassthrower (02/21/13 08:03 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
csa/montana
Den Mama
*****

Reged: 05/14/05

Loc: montana
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5693294 - 02/21/13 06:26 PM

Mike; thanks for the very interesting links!

Post Extras: Print Post   Remind Me!   Notify Moderator  
careysub
Carpal Tunnel
*****

Reged: 02/18/11

Loc: Rancho Cucamonga, CA
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5693299 - 02/21/13 06:30 PM

Since you are reviewing so many videos, I suggest that you select a group that give the best views off the bolide itself covering (not necessarily in one video) from earliest entry, to the main explosion, and the trailing remnants until they disappear, from different angles (this obviously not in one video).

Do not prejudice it based on incidentals like music, or being part of collection, or being a dashboard cam, as long as it provides good/excellent or unique images of the actual entry event.


Post Extras: Print Post   Remind Me!   Notify Moderator  
careysub
Carpal Tunnel
*****

Reged: 02/18/11

Loc: Rancho Cucamonga, CA
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5693308 - 02/21/13 06:37 PM

Quote:

Two more videos :

Chebarkul Video #7 - http://www.youtube.com/watch?v=NqClUPJQJMU

(NOTE - I received some feedback from an expert, and this particular video may be a fake or a different event. He raises some serious concerns about the authenticity. So take this one with a grain of salt until confirmed or denied.)






I think it is a fake also. It is showing an event which (if it is even real) is much slower and longer lasting than the real one, with no brilliant light like the real bolide. It could be a rocket launch.


Post Extras: Print Post   Remind Me!   Notify Moderator  
ZielkeNightsky
Pooh-Bah
*****

Reged: 10/01/06

Loc: Denmark
Re: Chebarkul - video analysis of fragments new [Re: Glassthrower]
      #5693324 - 02/21/13 06:49 PM

Hi

One the videos in Mikes post made me doing some analysis of the fragments. I think there's at least 6 larger fragments.

Link to video 200% size, cropped, with fragment pointers – 109mb.
http://www.nightsky.dk/Astronomi/Meteorites/Chelyabinsk/fragment_analysis.avi


Link to gif animation 200% size, cropped, with fragment pointers – 8.5mb.
http://www.nightsky.dk/Astronomi/Meteorites/Chelyabinsk/fragment_analysis.gif


Link to video filtered analysis, shows very nicely the two larger/brightest fragments. 123 mb.
http://www.nightsky.dk/Astronomi/Meteorites/Chelyabinsk/filtered-analysis.avi


Link to gif animation filtered analysis, shows very nicely the two larger/brightest fragments. 7.6mb.
http://www.nightsky.dk/Astronomi/Meteorites/Chelyabinsk/filtered-analysis.gif


Post Extras: Print Post   Remind Me!   Notify Moderator  
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Chebarkul - video analysis of fragments new [Re: ZielkeNightsky]
      #5693451 - 02/21/13 08:05 PM

Received some more feedback, and I am now convinced that video #7 was not Chebarkul. It was possibly a missile test or some unrelated event, but it's not the recent Russian meteorite fall.

Lars - great analysis work!

Have you considered posting these to the Meteorite Central mailing list? I am sure there are many there who would find your work interesting and useful.

Best regards,

MikeG


Post Extras: Print Post   Remind Me!   Notify Moderator  
ZielkeNightsky
Pooh-Bah
*****

Reged: 10/01/06

Loc: Denmark
Re: Chebarkul - video analysis of fragments new [Re: Glassthrower]
      #5694236 - 02/22/13 09:06 AM

Sent - had some troubles getting the mail through.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Grava T
Pooh-Bah
*****

Reged: 06/18/08

Loc: Quebec, Canada
Re: Chebarkul - video analysis of fragments new [Re: ZielkeNightsky]
      #5695678 - 02/22/13 09:26 PM

Thanks for the links. Some of the best for sure. Amazing!

Post Extras: Print Post   Remind Me!   Notify Moderator  
Jason H.
Pooh-Bah


Reged: 11/23/07

Loc: Central Florida
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5695807 - 02/22/13 10:45 PM

One can see the the termination and a separate windows blow out and in here

http://youtu.be/2Gc1HgO5hNY

Jason H.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Larrythebrewer
super member
*****

Reged: 02/14/09

Loc: Cincinnati, Oh
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Jason H.]
      #5696369 - 02/23/13 11:05 AM

I found this one interesting because at about the 1:04 mark in the video he breifly focuses on, & is possibly commenting on what appears to be "black flakes" falling on the snow. The videos location seems to be close to directly under the meteorites path
http://m.youtube.com/watch?feature=related&v=-otgMtaNJMw


Post Extras: Print Post   Remind Me!   Notify Moderator  
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Larrythebrewer]
      #5696445 - 02/23/13 11:46 AM

Interesting photos and details of Chebarkul meteorites - http://meteorites.ru/menu/press-e/yuzhnouralsky2013-e.php

Larry, I couldn't get your link to work. Do you have another link to it?


Post Extras: Print Post   Remind Me!   Notify Moderator  
csa/montana
Den Mama
*****

Reged: 05/14/05

Loc: montana
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5696666 - 02/23/13 01:57 PM

Mike, very nice link of this meteorite!

I want one!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Larrythebrewer
super member
*****

Reged: 02/14/09

Loc: Cincinnati, Oh
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5696843 - 02/23/13 03:35 PM

no thats the only link I could find
wait , see if this works
http://www.youtube.com/watch?v=-otgMtaNJMw&sns=em

Edited by Larrythebrewer (02/23/13 03:46 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Larrythebrewer]
      #5699426 - 02/25/13 08:50 AM

Thanks Larry!

Here is a fun link (but hard to understand) 37 minute compilation video in Russian. Interestingly, at around the 26-28 minute mark, the video shows some large(!) masses that were recovered but not widely reported in the media.

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

There is also some great footage of the shockwave damage.


Post Extras: Print Post   Remind Me!   Notify Moderator  
careysub
Carpal Tunnel
*****

Reged: 02/18/11

Loc: Rancho Cucamonga, CA
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5699517 - 02/25/13 09:51 AM

Quote:

Thanks Larry!

Here is a fun link (but hard to understand) 37 minute compilation video in Russian. Interestingly, at around the 26-28 minute mark, the video shows some large(!) masses that were recovered but not widely reported in the media.





Here is a report about a 1 kg fragment recovered:
http://english.ruvr.ru/2013_02_25/Largest-1kg-heavy-meteorite-fragment-found-...

This event is going to tremendously advance knowledge of these large asteroid explosions - we have (it seems) a near perfect model of the Tunguska Event in reduced scale recorded in abundant detail. A lot the speculation about Tunguska was made in a vacuum of ignorance (especially in the era before detailed computer simulation) during the 20th Century; this should put nearly all of it to rest.

Interestingly it was only last May that there were reports of detection of a possible fragment of Tunguska in Lake Cheko near the explosion site, which itself has only been determined to be a likely candidate fragment impact point in the last few years.

Mark Boslough at Sandia National Laboratory who did this study of Tunguska:
http://www.sciencedirect.com/science/article/pii/S0734743X08001784
in 2008 has already announced he is modelling the Chebarkul Event.

In general it seems that recent modelling has shown that large stony meteors are very efficient at vaporizing themselves in the explosion fireball - the larger they are they more efficient they are. Ironically it seems, the larger the stony meteor above some threshold, the smaller the recoverable fragment weight.

(Boslough's simulations suggest to me that Lake Cheko might actually be the terminal point of the remnant hydrodynamic jet, rather than a fragment impact.)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: careysub]
      #5699530 - 02/25/13 09:56 AM

In general terms, extremely-large extant meteorites are quite rare. Yes, the bigger the body the smaller the remnant it seems (in the majority of cases). And the really BIG meteorites we do see, tend to be irons. There are a few big rocks (Norton Country, Jilin, etc), but they are far outnumbered by the more-robust irons.

Here is the latest bulletin to the IAU about the orbit and trajectory of this body (complete with tons of numbers) -

Quote:


Electronic Telegram No. 3423
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
e-mail: cbatiau@... (alternate cbat@...)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


TRAJECTORY AND ORBIT OF THE CHELYABINSK SUPERBOLIDE
Jiri Borovicka, Pavel Spurny, and Lukas Shrbeny, Astronomical Institute
of the Academy of Sciences, Ondrejov, Czech Republic, report that they have
computed the atmospheric trajectory and velocity of the superbolide of 2013
Feb. 15.139 UT (3h20m UT), which caused some damage in the city of
Chelyabinsk, Russia. They used seven casual video records provisionally
calibrated with Google Maps tools. The trajectory was assumed to be linear.
The geographical coordinates of selected points along the trajectory are as
tabulated below:

Relative Longitude Latitude Height Velocity Notes
Time (s) (deg E) (deg N) (km) (km/s)

0.00 64.266 54.508 91.83 17.5 beginning of
registration
9.18 61.913 54.788 41.02 17.5 minor flare
11.20 61.455 54.836 31.73 17.5 major flare
12.36 61.159 54.867 25.81 17.5 flare
13.20 60.920 54.891 21.05 12.5 minor flare
16.20 60.606 54.922 14.94 4.3 end of
registration

The observed trajectory was 254 km long. The azimuth of the trajectory was
279.5 degrees, and the slope was 16.5 degrees to the horizontal (for the end
point). The uncertainty of the radiant is about one degree. The uncertainty
of the position of the trajectory is about 1 km (at the beginning, up to 4
km).
The pre-entry object that caused the superbolide was relatively fragile.
Severe fragmentation started at a height of 32 km under dynamic pressure of 4
MPa. The mass of the largest fragment, which landed in the lake Chebarkul,
was estimated to be 200-500 kg. One or two meteorites of the mass of several
tens of kg can be expected not far from the village Travniki. One piece of
mass approximately 1 kg may have landed to the northwest of Shchapino.
Numerous small fragments can be expected in the wide band located about 5 km
south of the trajectory, mostly between longitudes 60.9 and 61.35 degrees.
The blast wave, which strongly affected Chelyabinsk, was generated
between heights of 25 and 30 km. The radiant and heliocentric orbit were
calculated to be as follows:

Apparent radiant: Right ascension 328.6 +/- 1.0 deg
(equinox 2000.0) Declination +8.0 +/- 1.0 deg
Velocity 17.5 +/- 0.5 km/s

Geocentric radiant: Right ascension 334.7 +/- 1.2 deg
Declination -1.0 +/- 1.4 deg
Velocity 13.2 +/- 0.7 km/s

Orbit: a = 1.55 +/- 0.07 AU e = 0.50 +/- 0.02
q = 0.768 +/- 0.011 AU Q = 2.33 +/- 0.14 AU
(equinox 2000.0) Peri. = 109.7 +/- 1.8 deg Node = 326.41 deg
i = 3.6 +/- 0.7 deg

The data do not allow determination of the initial mass of the object prior
to entering the atmosphere. The trajectory will be further refined in the
future, provided that proper in situ calibrations of the videos are made.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

(C) Copyright 2013 CBAT
2013 February 23 (CBET 3423) Daniel W. E. Green





Post Extras: Print Post   Remind Me!   Notify Moderator  
ZielkeNightsky
Pooh-Bah
*****

Reged: 10/01/06

Loc: Denmark
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5699802 - 02/25/13 12:46 PM

The price is going up fast.

And I want one so badly - this is not good.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: ZielkeNightsky]
      #5699879 - 02/25/13 01:46 PM

Relax, market forces will drive the prices down over time. From reports I am hearing, there have already been several kilograms recovered. Once the spring thaw hits, expect the TKW to be many kilos, possibly hundreds of kilos. There are probably many many small pea-sized stones, like Holbrook or Pultusk. There will be plenty to go around eventually, and the prices will drop to levels considerably lower than the earliest offerings.

Post Extras: Print Post   Remind Me!   Notify Moderator  
ZielkeNightsky
Pooh-Bah
*****

Reged: 10/01/06

Loc: Denmark
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5699956 - 02/25/13 02:36 PM

I hope so Mike, but the waiting.......

My collection really needs a new centrepiece.


Post Extras: Print Post   Remind Me!   Notify Moderator  
highfnum
Carpal Tunnel
*****

Reged: 09/06/06

Loc: NE USA
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: ZielkeNightsky]
      #5706708 - 03/01/13 07:33 AM

Create collection
Sonic booms is what gets me


Post Extras: Print Post   Remind Me!   Notify Moderator  
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: ZielkeNightsky]
      #5707239 - 03/01/13 02:01 PM

I'm hearing rumors now that the Russian Duma is considering a new law to prohibit meteorite export - if this is true, it could be rushed through and take effect very soon. The Russians are seeing dollar signs and don't want to those dollars leaving the country without passing through the Kremlin first. This Chebarkul event grabbed a lot of attention, all the way back to Moscow.

This is going to be interesting to watch develop. I just hope it doesn't mean Russia is going to clamp down on new exports. Russia is the source of Seymchan, Brahin, Pallasovka, Sikhote Alin, Saratov, Koltsovo, etc. Will those be restricted as well?

Best regards,

MikeG


Post Extras: Print Post   Remind Me!   Notify Moderator  
csa/montana
Den Mama
*****

Reged: 05/14/05

Loc: montana
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5707447 - 03/01/13 04:23 PM

That doesn't sound like it's good news.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: csa/montana]
      #5707892 - 03/01/13 10:13 PM

The last 10 years has since an increase in regulation regarding meteorites. Much of it is due to misconceptions that there is a thriving black market where James Bond villians pay enormous sums of money for smuggled Moon Rocks. Even the New York Times has jumped on the tabloid journalism bandwagon and published a hit piece against private meteorite dealers. That article was rebuked by the same scientist who was misquoted in it and it drew an official rebuttal from the IMCA.

With increased media exposure comes increased liability. The scammers, nuts, and profiteers have been crawling out the woodworks to take advantage of newbies and gullible bidders.

A lot of people have become interested in meteorites lately, and many of them are doing it for the wrong reasons - money, to get attention, vanity, etc. I get a ton of scam emails every week that I delete immediately.

Meteorites have their own TV show now. Meteorites are being mentioned or shown more frequently in numerous documentary films and series on cable TV. Meteorite falls are now YouTube sensations and the media exaggerates every sensational aspect of the event, while paying token lip service to the science involved.

Now we have this Chelyabinsk event that is a modern-day Tunguska on a smaller scale. Tunguska happened just after the turn of the 20th century and it took 20 years for the first teams to reach the area and search. This new impact captured world attention within hours and coincided with the near pass of asteroid 2012 DA14. This was a perfect storm for a media blitz.

Worse, the Chelyabinsk area is a former military industrial complex with numerous secret sites where nuclear weapons were manufactured during the Cold War. Military bases are littered around the region and this event struck the area without any warning and showed how vulnerable we (and the Russians) are to this kind of threat. The Russians don't like feeling vulnerable to anything, and their military is now keenly interested in this event. It's no surprise that the Duma is now getting involved.

But, like all reactionary laws of this nature, the law is being passed after the fact. This means that all specimens that left the country before the law are not bound by it. Many such specimens have already left Russia and are in private hands as we speak. However, the majority of the stones are still inside the country, and if Russia tightly restricts them, it will greatly reduce the amount that comes out later. And that will drive up the demand and price for legal specimens (the grand-fathered ones).

This is technically-true for Canyon Diablos and Campo del Cielos. It is currently illegal to prospect for and recover either one of these meteorites. Yet there are still thousands of them on the market legally.

I'll try to keep everyone updated.

Best regards,

MikeG


Post Extras: Print Post   Remind Me!   Notify Moderator  
BSJ
Pooh-Bah
*****

Reged: 12/22/08

Loc: Grand Isle, VT
Re: Chebarkul - Chelyabinsk Meteorite Videos new [Re: Glassthrower]
      #5708252 - 03/02/13 07:18 AM

Long video, but lots of good shockwave impacts.
http://www.youtube.com/watch?v=SfrwPeHEjrU&feature=player_detailpage


Post Extras: Print Post   Remind Me!   Notify Moderator  
bob71741
scholastic sledgehammer
*****

Reged: 02/16/08

Chelyabinsk Meteoroid orbit reconstruction new [Re: BSJ]
      #5709059 - 03/02/13 04:06 PM

A preliminary reconstruction of the orbit of the Chelyabinsk Meteoroid

Abstract here: http://arxiv.org/abs/1302.5377
PDF File here: http://arxiv.org/pdf/1302.5377v1.pdf

originally posted on anther forum by George Drobnock


Post Extras: Print Post   Remind Me!   Notify Moderator  
Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Chelyabinsk Meteoroid orbit reconstruction new [Re: bob71741]
      #5709361 - 03/02/13 06:51 PM

I have some Chelyabinsk/Chebarkul lined up through a reliable source, but it may be another week or two before I get my hands on it. When I get it, I will be sure to post some photos. I'm buying a fully-crusted pea for myself (maybe 2-4g) and another gram or two of small fragments that I can resell as micromounts.

From a collector standpoint, I haven't been this excited about a fall in a long time

Coincidentally, a few weeks before this fall, I had decided to rebuild my collection of peas. I used to have a great collection of peas, but I had to sell them off three years ago. Now I am rebuilding for keeps, and Chebarkul will be a nice addition.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Ira
Carpal Tunnel
*****

Reged: 08/22/10

Loc: Mitzpe Ramon, Israel
Re: Chelyabinsk Meteoroid orbit reconstruction new [Re: Glassthrower]
      #5709409 - 03/02/13 07:27 PM

Well I want one!!!

/Ira


Post Extras: Print Post   Remind Me!   Notify Moderator  
PhilCo126
Post Laureate


Reged: 01/14/05

Loc: coastline of Belgium
Re: Chelyabinsk Meteoroid orbit reconstruction new [Re: Ira]
      #5716436 - 03/06/13 01:44 PM

Check BBC 4 Meteor Strike FireBall from Space:
http://www.youtube.com/watch?v=tZ9z0HG_BKA


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | (show all)


Extra information
0 registered and 3 anonymous users are browsing this forum.

Moderator:  Dave M, darklighteditor 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 2212

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics