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 Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list