Amazing work, Svend! A great example of cooperative work between broadly diverse members of the meteorite community, all for the advancement of science. Bravo!
Doug Ross > Dear all, > > An updated and final version of the Chelyabinsk strewnfield map and trajectory > ground projection is now available at: > > http://www.meteorite-recon.com/img_inventar/Chelyabinsk_strewnfield_map_7500.jpg > > For background information see: > > http://www.meteorite-recon.com/en/Meteorite_Chelyabinsk_6.html > > In March our calculations gave a window of 200 ? 800 kg for the Lake Chebarkul > fragment. Our scenario and the resulting map used a conservative value of 300 > kg > for this mass. Now, after its successful recovery, the determination of its > approximate mass (~ 600 kg) enabled us to narrow a few parameters of the > trajectory and dark flight. The resulting minor changes in the final map are > listed below: > > - The transverse displacement of the calculated wind shift discounted > impact point for the lake mass is reduced from 1.100 m to 950 m. > - As a result, the trajectory is slightly displaced to the south, albeit > with the map scale used, the change is of no consequence for the depiction > - Impact velocity for the lake mass is ~ 550 km/h instead of ~ 500 km/h > - The altitude at which the transition into dark flight occurred is ~ 14 > km instead of 14.7 km > > In addition to these changes, within the last two months a total of 34 masses > with documented find locations were submitted and successively added to the > map. > These recently discovered masses range from 0.5 g to 1,440 g. The final > version > of the strewnfield map now shows 285 find locations of Chelyabinsk meteorites, > of which 228 were submitted with their respective weights. > > Karl and I would like to thank all contributors. > > Cheers > > Svend > > www.meteorite-recon.com ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
