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Asteroid 2012 TC4 - How comes nobody picks up on this?
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<blockquote data-quote="heka2015" data-source="post: 158826" data-attributes="member: 7351"><p>Let us use the recent classification to be on the same page beforehand:</p><p></p><p>Meteoride = 10⁻⁴ to 1¹ meters wide ( recently changed from 10¹ m max.)</p><p>Asteroid = all above 1 meter width up to planetoids</p><p>Comet = icy body gassing out passing the sun, hence leaving a tail. Can contain solid body.</p><p>Meteor = Any of the above vaporizing when entering into earth atmosphere.</p><p>Meteorite = Any of the above surviving atmospheric entry with impact on surface</p><p></p><p>A Meteor can explode in an air burst and split, surviving in form of Meteorites impacting earth.</p><p></p><p></p><p>Reading your posts, i know you are a pragmatic man of science.</p><p>You sure don't mind to back that up somehow. [USER=443]@Harte[/USER]</p><p></p><p>On the other hand there is abundant indication, asteroids of certain size (reclassification should make it most of them now) favor air bursts (fireball/superbolide/bolid) and violently explode above ground, maximising the damage zone significantly and splitting up into meteorites finally impacting on earth.</p><p><a href="https://www.space.com/23423-russian-fireball-meteor-airburst-risk.html" target="_blank">Space.com</a></p><p><img src="https://upload.wikimedia.org/wikipedia/commons/e/e2/Mach_effect_sequence.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p>Here, articles about the miscalculating of kinetic energy on asteroid impacts, misjudgedment of impact frequency and underestimation of risks.</p><p><a href="https://www.nature.com/articles/nature12741.epdf?referrer_access_token=wpWtq0bTpQw6ZhTw_XakftRgN0jAjWel9jnR3ZoTv0PyqszVJsMboh07BaZDfmONEget5lbJtDTXTwE2VvrDWLwoJxhzPGiSbyBg5rZbOh6WiGv9A1i2Ph__4EgVoZP9bfbodwojo2p4G_5Yh1la0YPeSL2HCz7E4HJlFQUIT7WUdtNxjf7ACKbH4viKFjYdewylSyYK_ZiXgBXbB9EaVFF1Bzle20SkZslDhlzrPirFm7gXJh3PJa8eszH3owuU&tracking_referrer=www.nature.com" target="_blank">Nature.com 1</a></p><p><a href="http://www.nature.com/news/risk-of-massive-asteroid-strike-underestimated-1.14114" target="_blank">Nature.com 2</a></p><p></p><p>Some documented Asteroids "Impacts" all resulting beeing air burst.</p><p></p><p>|Name (Source) | Air Burst? | Alt. Burst | Date/Time | Size | Estim. Weight | Speed Entry | Yield</p><p></p><p>Cheabelaynsk (Source <a href="http:// https://en.wikipedia.org/wiki/Chelyabinsk_meteor" target="_blank">1</a>,<a href="http:// http://cams.seti.org/Popova2013-ms.pdf" target="_blank">2</a>)| Yes | 30-45 km | 15 March 2015 |18 m 10000-12000 t |19.16 km/s | 400-500 kt</p><p></p><p>Tunguska (<a href="http:// https://en.wikipedia.org/wiki/Tunguska_event" target="_blank">Source</a>) | Yes | 5-10 (8,5)km | 30 June 1908 | 60 - 190 m| ? | 33,500 mph | 3-5 Mt</p><p></p><p>Sikhote-Alin meteorite (<a href="http:// https://web.archive.org/web/20060521024636/http://www.planetarium.montreal.qc.ca/Information/Expo_Meteorites/Vedettes/sikhotealin_a.html" target="_blank">Source</a>) | Yes | 5.75 km |12 February 1947, 10:38 | Size? | 200 -300 kt |14 km/s | ?</p><p></p><p>Sutter's Mill meteorite (<a href="http:// https://en.wikipedia.org/wiki/Sutter%27s_Mill_meteorite" target="_blank">Source</a>) | Yes |48 km | April 22, 2012 07:51 PCT | 2–4 m | ? | 28.6 km/s | 4 kt</p><p></p><p>Curuçá River Event (Source <a href="http:// http://adsabs.harvard.edu/abs/2011P&SS...59...10C" target="_blank">1</a>,<a href="http:// http://www.lpi.usra.edu/meetings/metsoc2004/pdf/5150.pdf" target="_blank">2</a>,<a href="http:// http://www.sciencedirect.com/science/article/pii/S003206331000320X?via%3Dihub" target="_blank">3</a>) | Yes |? | 13 August 1930 | <9 m | 1000 - 25000 t | ? | 9 kt- 5 Mt (most ~1 Mt)</p><p></p><p>Chicora Meteor (<a href="http:// https://en.wikipedia.org/wiki/Chicora,_Pennsylvania#Chicora_Meteor" target="_blank">Source</a>)| yes | 19 km | 24 June 1938 | ? | ? | ? | ?</p><p></p><p>Ch'ing-yang event (<a href="http:// https://en.wikipedia.org/wiki/1490_Ch%27ing-yang_event" target="_blank">Source</a>) | Yes(presumed) |1490 documented |Tunguska-Size|10 000 struck dead from meteorites</p><p> </p><p>More evidence from Wikipedia on Meteor Air Burst.(<a href="https://en.wikipedia.org/wiki/List_of_meteor_air_bursts" target="_blank">Source</a>)</p><p></p><p>Lets take Chebyalinsk as blueprint due the similar size and look at the damage it done.</p><p>#</p><p>Chebyalinsk Meteor/Meteorites Damage</p><p># Source <a href="http://cams.seti.org/Popova2013-ms.pdf" target="_blank">1</a>,<a href="https://en.wikipedia.org/wiki/Chelyabinsk_meteor" target="_blank">2</a></p><p>- 50 villages were visited to verify the extent of glass damage</p><p>- In Chelyabinsk itself, 3613 apartment buildings (about 44%) had shattered and</p><p> broken glass, but these were not evenly distributed in the city.</p><p>- Structural damage included the collapse of a zinc factory roof.</p><p>- Directly below the fireball’s path, the shock wave was strong enough to blow people off their feet.</p><p>- In Yemanzhelinsk, window frames facing the trajectory were pushed inwards, and</p><p> suspended ceilings were sucked down above broken windows</p><p>- Due to shock-wave–induced vibrations, electricity and cell phone connectivity was briefly halted in the Kunashaksky</p><p> district at the far northern end of the damage area.</p><p>- The gas supply was briefly interrupted in some districts because of valves reacting to the vibrations.</p><p>- People found it painful to look at the bright fireball, but glancing away prevented lasting eye damage.</p><p>- Of 1113 respondents to an Internet survey who were outside at the time, 25 were</p><p> sunburned (2.2%), 315 felt hot (28%), and 415 (37%) felt warm</p><p>- In Korkino, 30 km from the point of peak brightness, one resident</p><p> reported getting a mild sunburn on the face, followed by peeling of skin.</p><p> Such effects occur at a minimum erythema dose of ~1000 J/m2 of 290- to 320-nm radiation (mostly UV-B).</p><p>- 5.3% reported sunburn, 48% eyes hurt, and 2.9% retinal burns.</p><p>- 6.4% reported a concussion or mental confusion, upset, or exhaustion as a result of excessive stress.</p><p>- Russian authorities stated that 1,491 people sought medical attention in Chelyabinsk Oblast within the first few days.</p><p>- most of the injured were hurt by the secondary blast effects of shattered, falling or blown-in glass.</p><p>- by 5 March 2013 the number of damaged buildings was tallied at over 7,200, which included some 6,040 apartment blocks, 293 medical facilities,</p><p> 718 schools and universities, 100 cultural organisations, and 43 sport facilities, of which only about one and a half percent had not yet been repaired.</p></blockquote><p></p>
[QUOTE="heka2015, post: 158826, member: 7351"] Let us use the recent classification to be on the same page beforehand: Meteoride = 10⁻⁴ to 1¹ meters wide ( recently changed from 10¹ m max.) Asteroid = all above 1 meter width up to planetoids Comet = icy body gassing out passing the sun, hence leaving a tail. Can contain solid body. Meteor = Any of the above vaporizing when entering into earth atmosphere. Meteorite = Any of the above surviving atmospheric entry with impact on surface A Meteor can explode in an air burst and split, surviving in form of Meteorites impacting earth. Reading your posts, i know you are a pragmatic man of science. You sure don't mind to back that up somehow. [USER=443]@Harte[/USER] On the other hand there is abundant indication, asteroids of certain size (reclassification should make it most of them now) favor air bursts (fireball/superbolide/bolid) and violently explode above ground, maximising the damage zone significantly and splitting up into meteorites finally impacting on earth. [URL='https://www.space.com/23423-russian-fireball-meteor-airburst-risk.html']Space.com[/URL] [IMG]https://upload.wikimedia.org/wikipedia/commons/e/e2/Mach_effect_sequence.png[/IMG] Here, articles about the miscalculating of kinetic energy on asteroid impacts, misjudgedment of impact frequency and underestimation of risks. [URL='https://www.nature.com/articles/nature12741.epdf?referrer_access_token=wpWtq0bTpQw6ZhTw_XakftRgN0jAjWel9jnR3ZoTv0PyqszVJsMboh07BaZDfmONEget5lbJtDTXTwE2VvrDWLwoJxhzPGiSbyBg5rZbOh6WiGv9A1i2Ph__4EgVoZP9bfbodwojo2p4G_5Yh1la0YPeSL2HCz7E4HJlFQUIT7WUdtNxjf7ACKbH4viKFjYdewylSyYK_ZiXgBXbB9EaVFF1Bzle20SkZslDhlzrPirFm7gXJh3PJa8eszH3owuU&tracking_referrer=www.nature.com']Nature.com 1[/URL] [URL='http://www.nature.com/news/risk-of-massive-asteroid-strike-underestimated-1.14114']Nature.com 2[/URL] Some documented Asteroids "Impacts" all resulting beeing air burst. |Name (Source) | Air Burst? | Alt. Burst | Date/Time | Size | Estim. Weight | Speed Entry | Yield Cheabelaynsk (Source [URL='http:// https://en.wikipedia.org/wiki/Chelyabinsk_meteor']1[/URL],[URL='http:// http://cams.seti.org/Popova2013-ms.pdf']2[/URL])| Yes | 30-45 km | 15 March 2015 |18 m 10000-12000 t |19.16 km/s | 400-500 kt Tunguska ([URL='http:// https://en.wikipedia.org/wiki/Tunguska_event']Source[/URL]) | Yes | 5-10 (8,5)km | 30 June 1908 | 60 - 190 m| ? | 33,500 mph | 3-5 Mt Sikhote-Alin meteorite ([URL='http:// https://web.archive.org/web/20060521024636/http://www.planetarium.montreal.qc.ca/Information/Expo_Meteorites/Vedettes/sikhotealin_a.html']Source[/URL]) | Yes | 5.75 km |12 February 1947, 10:38 | Size? | 200 -300 kt |14 km/s | ? Sutter's Mill meteorite ([URL='http:// https://en.wikipedia.org/wiki/Sutter%27s_Mill_meteorite']Source[/URL]) | Yes |48 km | April 22, 2012 07:51 PCT | 2–4 m | ? | 28.6 km/s | 4 kt Curuçá River Event (Source [URL='http:// http://adsabs.harvard.edu/abs/2011P&SS...59...10C']1[/URL],[URL='http:// http://www.lpi.usra.edu/meetings/metsoc2004/pdf/5150.pdf']2[/URL],[URL='http:// http://www.sciencedirect.com/science/article/pii/S003206331000320X?via%3Dihub']3[/URL]) | Yes |? | 13 August 1930 | <9 m | 1000 - 25000 t | ? | 9 kt- 5 Mt (most ~1 Mt) Chicora Meteor ([URL='http:// https://en.wikipedia.org/wiki/Chicora,_Pennsylvania#Chicora_Meteor']Source[/URL])| yes | 19 km | 24 June 1938 | ? | ? | ? | ? Ch'ing-yang event ([URL='http:// https://en.wikipedia.org/wiki/1490_Ch%27ing-yang_event']Source[/URL]) | Yes(presumed) |1490 documented |Tunguska-Size|10 000 struck dead from meteorites More evidence from Wikipedia on Meteor Air Burst.([URL='https://en.wikipedia.org/wiki/List_of_meteor_air_bursts']Source[/URL]) Lets take Chebyalinsk as blueprint due the similar size and look at the damage it done. # Chebyalinsk Meteor/Meteorites Damage # Source [URL='http://cams.seti.org/Popova2013-ms.pdf']1[/URL],[URL='https://en.wikipedia.org/wiki/Chelyabinsk_meteor']2[/URL] - 50 villages were visited to verify the extent of glass damage - In Chelyabinsk itself, 3613 apartment buildings (about 44%) had shattered and broken glass, but these were not evenly distributed in the city. - Structural damage included the collapse of a zinc factory roof. - Directly below the fireball’s path, the shock wave was strong enough to blow people off their feet. - In Yemanzhelinsk, window frames facing the trajectory were pushed inwards, and suspended ceilings were sucked down above broken windows - Due to shock-wave–induced vibrations, electricity and cell phone connectivity was briefly halted in the Kunashaksky district at the far northern end of the damage area. - The gas supply was briefly interrupted in some districts because of valves reacting to the vibrations. - People found it painful to look at the bright fireball, but glancing away prevented lasting eye damage. - Of 1113 respondents to an Internet survey who were outside at the time, 25 were sunburned (2.2%), 315 felt hot (28%), and 415 (37%) felt warm - In Korkino, 30 km from the point of peak brightness, one resident reported getting a mild sunburn on the face, followed by peeling of skin. Such effects occur at a minimum erythema dose of ~1000 J/m2 of 290- to 320-nm radiation (mostly UV-B). - 5.3% reported sunburn, 48% eyes hurt, and 2.9% retinal burns. - 6.4% reported a concussion or mental confusion, upset, or exhaustion as a result of excessive stress. - Russian authorities stated that 1,491 people sought medical attention in Chelyabinsk Oblast within the first few days. - most of the injured were hurt by the secondary blast effects of shattered, falling or blown-in glass. - by 5 March 2013 the number of damaged buildings was tallied at over 7,200, which included some 6,040 apartment blocks, 293 medical facilities, 718 schools and universities, 100 cultural organisations, and 43 sport facilities, of which only about one and a half percent had not yet been repaired. [/QUOTE]
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