Hi John – yes, being a member of the asteroid monitoring community has its advantages as far as timely communication about such events. But the Minor Planet Electronic Circulars are out there for anyone to read. Here was the MPEC for this impactor:
https://minorplanetcenter.net/mpec/K23/K23CA3.html Using the astrometry in that MPEC, anyone familiar with Bill Gray’s Find_Orb software can reconstruct the asteroid’s trajectory with high precision. As in the case with Almahata Sitta, meteorites will certainly be recovered from this fall – thankfully from a country much easier to get to! --Rob Sent from Mail for Windows From: John Lutzon Sent: Tuesday, February 14, 2023 1:12 PM To: Rob Matson Cc: meteorite-list@meteoritecentral.com Subject: Re: [meteorite-list] Small, earth-impacting asteroid/meteoroid videos now showing up online Ah, to have such knowledge & contacts. Thanks Everyone for keeping us in the loop. JL .--- .-.. --- ..- - ----- Original Message ----- From: Rob Matson via Meteorite-list To: meteorite-list@meteoritecentral.com Sent: Tuesday, February 14, 2023 12:15 PM Subject: Re: [meteorite-list] Small, earth-impacting asteroid/meteoroid videos now showing up online Flight direction was azimuth 102, entry angle about 41 degrees from vertical, slow entry velocity (~14 km/sec). There are certainly meteorites on the ground as this was a 1-1.5 meter, non-cometary body. The altitude was 42 km when it crossed the Normandy coastline, and the terminal burst had not yet occurred. I’ve already done dark flight modeling of this fall using radiosonde data from Herstmonceaux (balloon launched three hours before the fall from about 60 miles to the north in the southern UK). --Rob Sent from Mail for Windows From: Chris Peterson via Meteorite-list Sent: Tuesday, February 14, 2023 7:55 AM To: meteorite-list@meteoritecentral.com Subject: Re: [meteorite-list] Small,earth-impacting asteroid/meteoroid videos now showing up online It was heading generally eastward over the Channel and was still burning when it crossed the French shoreline. It is likely to have dropped meteorites on land. Chris ******************************* Chris L Peterson Cloudbait Observatory https://www.cloudbait.com On 2/14/2023 3:29 AM, Graham Ensor via Meteorite-list wrote: > It was heading from France and terminated it seems just as it reached the > channel so likely everything is in the sea if it did drop anything. Not > seen any predictions that it made landfall in France or the UK. So close > and yet so far. > > Graham > > On Mon, Feb 13, 2023 at 11:27 PM Darryl Pitt via Meteorite-list < > meteorite-list@meteoritecentral.com> wrote: > >> >> >> Nice! :-) >> >> On Feb 12, 2023, at 11:10 PM, Matson, Rob D. [US-US] via Meteorite-list < >> meteorite-list@meteoritecentral.com> wrote: >> >> A small (~1-meter) asteroid that astronomers have been tracking for >> several hours earlier today crossed over the English Channel one hour ago >> (3:00 UT 13 February) and broke up over the coast of Normandy. Many videos >> of it are already appearing on the web. Here’s one taken from Brighton, UK >> (south coast of England) looking across the channel toward France: >> >> https://twitter.com/KadeFlowers/status/1624967147708420103 >> >> Should be numerous meteorites on the ground – the meteoroid was at about >> 40-km altitude at the point it crossed the French coastline north of >> Saint-Martin-aux-Buneaux, so nearly all of it should be over land. --Rob >> ______________________________________________ >> Meteorite-list mailing list >> Meteorite-list@meteoritecentral.com >> https://pairlist2.pair.net/mailman/listinfo/meteorite-list >> >> >> ______________________________________________ >> Meteorite-list mailing list >> Meteorite-list@meteoritecentral.com >> https://pairlist2.pair.net/mailman/listinfo/meteorite-list >> > > > ______________________________________________ > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > https://pairlist2.pair.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist2.pair.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist2.pair.net/mailman/listinfo/meteorite-list
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