4 ms·

On Avi Loeb's Spherules

5 points by xqcgrek2 3y ago

commenter902 3y ago
They did a control sweep away from the main site and did not see similar objects.
- lamontcg 3y ago
  > The meteor location is not known to within tens of km. CNEOS reports locations to ±11 km. Siraj & Loeb (arXiv, not reviewed) try to use the Manus Island seismometer’s detection of the airburst to refine this. If the explosion arrived at 271.0±0.5 s it was 83.9±0.7 km away. 7/20 https://twitter.com/Deschscoveries/status/1697538031283216699 https://twitter.com/Deschscoveries/status/169753803128321669... > But look at their Figure 3. Can you say the first signal arrived at precisely 271 s and not 280 s? If not, then the distance is uncertain to within about 10 km. They don’t know where to look! Their Figure 4 even shows the meteor going the exact opposite direction! 8/20 https://twitter.com/Deschscoveries/status/1697538033082581414 https://twitter.com/Deschscoveries/status/169753803308258141... > Any material would be spread out over many tens of km2. This meteor disintegrated over 0.3 s, while moving tens of km to the east. Strewn fields are typically tens of km long.The Equatorial UnderCurrent would have spread sinking spherules tens of km. 9/20 https://twitter.com/Deschscoveries/status/1697538035288875250 https://twitter.com/Deschscoveries/status/169753803528887525... > The seafloor is littered with cosmic spherules from the last tens of thousands of years, tens of millions in their search area alone, outnumbering any from the 2014 meteor by thousandsfold. Loeb’s spherules don’t come with labels saying they are from the 2014 meteor. 10/20 https://twitter.com/Deschscoveries/status/1697538037264286194 https://twitter.com/Deschscoveries/status/169753803726428619... > Loeb asserts the 5 unusual spherules are from what he imagines is the meteor path, but they really didn’t sample away from the path, and it’s all small number statistics and circumstantial. Again, none of these spherules has to come from the 2014 meteor. 11/20 https://twitter.com/Deschscoveries/status/1697538038514299357 https://twitter.com/Deschscoveries/status/169753803851429935...

5 points by xqcgrek2 3y ago

commenter902 3y ago

They did a control sweep away from the main site and did not see similar objects.

lamontcg 3y ago
> The meteor location is not known to within tens of km. CNEOS reports locations to ±11 km. Siraj & Loeb (arXiv, not reviewed) try to use the Manus Island seismometer’s detection of the airburst to refine this. If the explosion arrived at 271.0±0.5 s it was 83.9±0.7 km away. 7/20 https://twitter.com/Deschscoveries/status/1697538031283216699 https://twitter.com/Deschscoveries/status/169753803128321669... > But look at their Figure 3. Can you say the first signal arrived at precisely 271 s and not 280 s? If not, then the distance is uncertain to within about 10 km. They don’t know where to look! Their Figure 4 even shows the meteor going the exact opposite direction! 8/20 https://twitter.com/Deschscoveries/status/1697538033082581414 https://twitter.com/Deschscoveries/status/169753803308258141... > Any material would be spread out over many tens of km2. This meteor disintegrated over 0.3 s, while moving tens of km to the east. Strewn fields are typically tens of km long.The Equatorial UnderCurrent would have spread sinking spherules tens of km. 9/20 https://twitter.com/Deschscoveries/status/1697538035288875250 https://twitter.com/Deschscoveries/status/169753803528887525... > The seafloor is littered with cosmic spherules from the last tens of thousands of years, tens of millions in their search area alone, outnumbering any from the 2014 meteor by thousandsfold. Loeb’s spherules don’t come with labels saying they are from the 2014 meteor. 10/20 https://twitter.com/Deschscoveries/status/1697538037264286194 https://twitter.com/Deschscoveries/status/169753803726428619... > Loeb asserts the 5 unusual spherules are from what he imagines is the meteor path, but they really didn’t sample away from the path, and it’s all small number statistics and circumstantial. Again, none of these spherules has to come from the 2014 meteor. 11/20 https://twitter.com/Deschscoveries/status/1697538038514299357 https://twitter.com/Deschscoveries/status/169753803851429935...