[meteorite-list] Small, earth-impacting asteroid/meteoroid videos now showing up online

[Rob Matson]

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 at 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 at 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 at 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 at meteoritecentral.com> wrote:
> 
>>
>>
>> Nice!   :-)
>>
>> On Feb 12, 2023, at 11:10 PM, Matson, Rob D. [US-US] via Meteorite-list <
>> meteorite-list at 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
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