To: <[email protected]>, <[email protected]> Subject: Grimsby, Ontario bolide info From: "Matson, Robert D." <[email protected]> Date: Thu, 15 Oct 2009 11:16:08 -0700
Hi Darren, (Please feel free to forward to the list on my behalf.) At the beginning of the week I contacted Dr. Peter Brown at University of Western Ontario, letting him know that the Grimsby bolide terminal burst had been captured on NexRad Doppler radar images taken in Buffalo, New York. I created several maps of the radar returns at three different altitudes, showing that the terminal burst location is in perfect agreement with UWO's solution (triangulated from seven all-sky cameras). I shared this information with Dr. Tony Phillips at SpaceWeather, and he has provided links on his site to a couple of the radar images I created: http://www.spaceweather.com/archive.php?view=1&day=12&month=10&year=2009 A wide-area map is here: http://www.spaceweather.com/swpod2009/13oct09/Grimsby_5100m.jpg And a second map zoomed in on the terminal burst cloud is here: http://www.spaceweather.com/swpod2009/13oct09/Grimsby_Zoom_5100m.jpg As the filenames suggest, the Doppler beam altitude at this location was a little over 5 km, and the area covered is roughly a mile wide by 2 miles long. (There were also colocated radar returns at 6.5 km and 3.7 km, though the largest returns were at 5.1 km.) Judging from where meteorites were found in Park Forest and Ash Creek (West), I would expect a number of meteorites to be found directly beneath the strongest radar returns, with sizes generally increasing as you move to the east-southeast. I have not yet seen any images of the purported golf-ball-sized meteorite that hit the SUV, nor do I know where this SUV was parked, so can't judge whether it's a legitimate possibility. --Rob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Darren Garrison Sent: Thursday, October 15, 2009 11:33 AM To: [email protected] Subject: [meteorite-list] Time to play "Hammer or Scammer" http://www.stcatharinesstandard.ca/ArticleDisplay.aspx?e=2127299 Grimsby meteorite found Updated 32 mins ago The Grimsby space rock has been found. A fragment of meteorite the size of a golf ball smashed in the windshield of a Grimsby family's sport utility vehicle on Sept. 25, according to a media release from the University of Western Ontario. Astronomers released a video Oct. 7 of a blinding meteor streaking across the skies of Southern Ontario three weeks ago, estimating pieces may have landed in Grimsby or West Lincoln. Meteorite hunters have been scouring the area ever since. A press conference to discuss the find is scheduled for Friday morning. ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
