Mr. Kereszty, Matson,
From a couch collector to the "eyes in the skies and boots on the grounds"
--- I am amazed at your skillful efforts and big thanks to all of you do'ers!
Kudos all way 'round. Bravo
John
> On 02/01/2024 1:31 PM EST Matson, Rob D. [US-US] via Meteorite-list
> <[email protected]> wrote:
>
>
> Congratulations on your finds, Zsolt! A little back-story from my end. I
> followed 2024 BX1 from the moment of its discovery (having been fortunate
> enough to be at my computer when I got the first JPL/SCOUT alerts). After
> the first 7 observations, the minor planet community knew it was going to be
> an impactor in northern Germany in less than a couple hours (21 Jan 2024
> 00:32:45 UT). As the # of telescopic observations grew from 7 to 20 to 50 to
> over 100, I kept adjusting the impact trajectory, ultimately constraining the
> terminal path to about 100-meter uncertainty. Meanwhile, I grabbed the
> radiosonde upper atmospheric wind data launched from Lindenberg (only 110 km
> away from the future fall location) and ran dark flight predictions. This is
> the first fall where I was able to generate a map of predicted mass locations
> ... BEFORE the meteoroid even hit the atmosphere! 😊 I passed this map and
> kmz file on to Peter Jenniskens who was flying out the next day. (Also a few
> others who had expressed interest in searching for fragments of this Apollo
> asteroid.)
>
> As Zsolt knows, this was no run-of-the-mill fall. In a fresh fall (such as
> the one that occurred north of Quartzsite, AZ at the end of December), the
> stones are almost always covered in black fusion crust -- usually a matte
> black for chondrites, or a shiny, glassy black for many types of achondrites.
> Not so for this new fall north of Brandenberg! If I had been over their
> searching, I could easily have walked right past these newly arrived rocks
> from space that to the casual eye look like terrestrial stones. Hats off to
> (I believe) the Polish team that made the first 3 or 4 finds, recognizing
> them for what they were!
>
> 2024 BX1 was not a large meteoroid: between 0.8 and 1.4 meters in size,
> depending on its albedo. The orbit is (or rather was) well established, with
> an aphelion that pretty much ruled out a (low albedo) carbonaceous chondrite.
> So the size was most likely around a meter or slightly less. The entry
> velocity was relatively slow (15.2 km/sec), but the entry angle was quite
> steep (only 15 degrees from vertical). The former favored meteorites on the
> ground, while the latter still meant the total recovered mass would be low.
>
> Anyway, kudos again on your rare finds, Zsolt! And a big shout out to
> Hungarian astronomer Krisztian Sarneczky for finding and rapidly reporting
> 2024 BX1! This was not Krisztian's first rodeo -- he has the unique
> distinction of having discovered not just one Earth impactor, but now THREE!
> (Less than a year ago he discovered 2023 CX1 -- the asteroid that entered
> over Normandy and was also successfully found by meteorite hunters.) Clearly
> he is doing something right with his setup and operational plan!
>
> Cheers,
> Rob
>
> -----Original Message-----
> From: Meteorite-list <[email protected]> On Behalf
> Of Zsolt Kereszty via Meteorite-list
> Sent: Thursday, February 1, 2024 6:08 AM
> To: [email protected]
> Subject: EXTERNAL: [meteorite-list] For sale 9.6 gr complete piece of new
> 2024 BX1 prediction fall asteroid - very nee found Germany
>
> CAUTION: This email originated from outside of Leidos. Be cautious when
> clicking or opening content.
>
> Dear List Members!
>
> Just I now finished my expedition in Germany, cmosed to Berlin at Ribbeck. It
> took for 6 days and 100 km long.
> So I have ONLY one piece what I can sell, I keep my other piece. I have found
> it today.
>
> I have in-situ photos, GPS coordinates, found time, soil sample from under
> the piece, plants, today local newspaper, german choclste :-) Thats a fully
> documented piece.
>
> If I have measured it well in the field its 9.6 gr with cracked crazy
> translucent fusion crust. I didnt see ever such unique crust! Its an aubrite !
>
> So the price with the additional things is 18000€
>
> If I know well there is largest for sale piece of 2024BX1 recently.
>
> If you interest contact me and I send you the images.
>
> Best Regards!
>
> Zsolt Kereszty
> IMCA, GMA, MetSoc
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