[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: NWA 7678 Contributed by: Dobrova Olga http://www.tucsonmeteorites.com/mpodmain.asp?DD=11/18/2018 __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] possible Alabama lunar meteorite fall
If there has been discussion of this on the List, I missed it https://ares.jsc.nasa.gov/meteorite-falls/ ~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+ Randy L. Korotev Research Professor, retired Department of Earth & Planetary Sciences Washington University in Saint Louis __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] possible Alabama lunar meteorite fall
Hi Randy, It hadn't been mentioned yet on the Met-List. I worked this fall last week (unaware that Marc Fries had already done so), so the fortunate result of the independent analysis is that two people came up with the same answer and the exact same radar returns. (I also analyzed the Carrollton, AL, seismic station data which has an unmistakable sonic boom just 106 seconds after the terminal burst of the bolide.) I'm 100% sure these returns are associated with the fall since they are practically colocated with the seismometer. Upper atmospheric winds were high at the time of the fall -- jet stream was about 125 knots blowing almost due east. This is why the Doppler radar returns subsequent to the initial high-altitude westerb return at 15 km are displaced to the east of it. At the altitudes below the 2.5-km altitude radar cluster, the winds were below 30 knots and blowing more to the southeast or ESE. This is supported by the small southeastward shift from the central, linear-looking return, and the wider cluster to its lower right that was scanned less than a minute later. The first place I would search would be the southeast edge of the 2.5-km altitude cluster. Unfortunately, this is a tough search area. --Rob From: Meteorite-list [meteorite-list-boun...@meteoritecentral.com] on behalf of Korotev, Randy via Meteorite-list [meteorite-list@meteoritecentral.com] Sent: Sunday, November 18, 2018 8:26 AM To: meteorite-list@meteoritecentral.com Subject: EXTERNAL: [meteorite-list] possible Alabama lunar meteorite fall If there has been discussion of this on the List, I missed it https://ares.jsc.nasa.gov/meteorite-falls/ ~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+ Randy L. Korotev Research Professor, retired Department of Earth & Planetary Sciences Washington University in Saint Louis __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] possible Alabama lunar meteorite fall
Randy, Rob, What makes you think that it could be a Lunar? Yes, I read the article, and it is just mentioned as a "possibility". Your opinions? Anne Black IMPACTIKA.com impact...@aol.com -Original Message- From: Matson, Rob D. via Meteorite-list To: meteorite-list@meteoritecentral.com Sent: Sun, Nov 18, 2018 12:31 pm Subject: Re: [meteorite-list] possible Alabama lunar meteorite fall Hi Randy, It hadn't been mentioned yet on the Met-List. I worked this fall last week (unaware that Marc Fries had already done so), so the fortunate result of the independent analysis is that two people came up with the same answer and the exact same radar returns. (I also analyzed the Carrollton, AL, seismic station data which has an unmistakable sonic boom just 106 seconds after the terminal burst of the bolide.) I'm 100% sure these returns are associated with the fall since they are practically colocated with the seismometer. Upper atmospheric winds were high at the time of the fall -- jet stream was about 125 knots blowing almost due east. This is why the Doppler radar returns subsequent to the initial high-altitude westerb return at 15 km are displaced to the east of it. At the altitudes below the 2.5-km altitude radar cluster, the winds were below 30 knots and blowing more to the southeast or ESE. This is supported by the small southeastward shift from the central, linear-looking return, and the wider cluster to its lower right that was scanned less than a minute later. The first place I would search would be the southeast edge of the 2.5-km altitude cluster. Unfortunately, this is a tough search area. --Rob From: Meteorite-list [meteorite-list-boun...@meteoritecentral.com] on behalf of Korotev, Randy via Meteorite-list [meteorite-list@meteoritecentral.com] Sent: Sunday, November 18, 2018 8:26 AM To: meteorite-list@meteoritecentral.com Subject: EXTERNAL: [meteorite-list] possible Alabama lunar meteorite fall If there has been discussion of this on the List, I missed it https://ares.jsc.nasa.gov/meteorite-falls/ ~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+ Randy L. Korotev Research Professor, retired Department of Earth & Planetary Sciences Washington University in Saint Louis __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] possible Alabama lunar meteorite fall
I can answer this, as we got enough data from our meteor cameras to compute an orbit. It was very similar to that of Earth (semi major axis of 1 AU, eccentricity < 0.1) with an inclination within 2 standard deviations of that of the Moon. This means we are either dealing with an evolved orbit (most likely) or lunar ejecta (much less likely, but not impossible). Bill Cooke NASA Meteoroid Environment Office (Sent from my iPad) > On Nov 18, 2018, at 4:01 PM, Anne Black via Meteorite-list > wrote: > > Randy, Rob, > > What makes you think that it could be a Lunar? > Yes, I read the article, and it is just mentioned as a "possibility". > > Your opinions? > > Anne Black > IMPACTIKA.com > impact...@aol.com > > > > -Original Message- > From: Matson, Rob D. via Meteorite-list > To: meteorite-list@meteoritecentral.com > Sent: Sun, Nov 18, 2018 12:31 pm > Subject: Re: [meteorite-list] possible Alabama lunar meteorite fall > > > Hi Randy, > > It hadn't been mentioned yet on the Met-List. I worked this fall last week > (unaware > that Marc Fries had already done so), so the fortunate result of the > independent > analysis is that two people came up with the same answer and the exact same > radar returns. (I also analyzed the Carrollton, AL, seismic station data > which has > an unmistakable sonic boom just 106 seconds after the terminal burst of the > bolide.) I'm 100% sure these returns are associated with the fall since they > are > practically colocated with the seismometer. > > Upper atmospheric winds were high at the time of the fall -- jet stream was > about 125 knots blowing almost due east. This is why the Doppler radar > returns subsequent to the initial high-altitude westerb return at 15 km are > displaced to the east of it. At the altitudes below the 2.5-km altitude radar > cluster, the winds were below 30 knots and blowing more to the southeast > or ESE. This is supported by the small southeastward shift from the central, > linear-looking return, and the wider cluster to its lower right that was > scanned less than a minute later. The first place I would search would be > the southeast edge of the 2.5-km altitude cluster. > > Unfortunately, this is a tough search area. --Rob > > > From: Meteorite-list [meteorite-list-boun...@meteoritecentral.com] on behalf > of Korotev, Randy via Meteorite-list [meteorite-list@meteoritecentral.com] > Sent: Sunday, November 18, 2018 8:26 AM > To: meteorite-list@meteoritecentral.com > Subject: EXTERNAL: [meteorite-list] possible Alabama lunar meteorite fall > > If there has been discussion of this on the List, I missed it > > https://ares.jsc.nasa.gov/meteorite-falls/ > > ~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+ > Randy L. Korotev > Research Professor, retired > Department of Earth & Planetary Sciences > Washington University in Saint Louis > __ > > Visit our Facebook page https://www.facebook.com/meteoritecentral and the > Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > https://pairlist3.pair.net/mailman/listinfo/meteorite-list > > __ > > Visit our Facebook page https://www.facebook.com/meteoritecentral and the > Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] possible Alabama lunar meteorite fall
Hi Anne -- Bill beat me to it. Basically you have a small asteroid in an orbit that is dynamically difficult (but not impossible) to achieve without having originated in the earth-Moon system. The aphelion was well inside the orbit of Mars, so the only way it could get from the Main Belt to the orbit that it occupied immediately prior to hitting the earth is via past earth/Moon encounters. The easier path is via lunar ejecta following a NEO impact. --Rob From: Bill Cooke [cook...@comcast.net] Sent: Sunday, November 18, 2018 2:18 PM To: Anne Black Cc: Matson, Rob D. [US-US]; meteorite-list@meteoritecentral.com Subject: EXTERNAL: Re: [meteorite-list] possible Alabama lunar meteorite fall I can answer this, as we got enough data from our meteor cameras to compute an orbit. It was very similar to that of Earth (semi major axis of 1 AU, eccentricity < 0.1) with an inclination within 2 standard deviations of that of the Moon. This means we are either dealing with an evolved orbit (most likely) or lunar ejecta (much less likely, but not impossible). Bill Cooke NASA Meteoroid Environment Office (Sent from my iPad) > On Nov 18, 2018, at 4:01 PM, Anne Black via Meteorite-list > wrote: > > Randy, Rob, > > What makes you think that it could be a Lunar? > Yes, I read the article, and it is just mentioned as a "possibility". > > Your opinions? > > Anne Black > IMPACTIKA.com > impact...@aol.com > > > > -Original Message- > From: Matson, Rob D. via Meteorite-list > To: meteorite-list@meteoritecentral.com > Sent: Sun, Nov 18, 2018 12:31 pm > Subject: Re: [meteorite-list] possible Alabama lunar meteorite fall > > > Hi Randy, > > It hadn't been mentioned yet on the Met-List. I worked this fall last week > (unaware > that Marc Fries had already done so), so the fortunate result of the > independent > analysis is that two people came up with the same answer and the exact same > radar returns. (I also analyzed the Carrollton, AL, seismic station data > which has > an unmistakable sonic boom just 106 seconds after the terminal burst of the > bolide.) I'm 100% sure these returns are associated with the fall since they > are > practically colocated with the seismometer. > > Upper atmospheric winds were high at the time of the fall -- jet stream was > about 125 knots blowing almost due east. This is why the Doppler radar > returns subsequent to the initial high-altitude westerb return at 15 km are > displaced to the east of it. At the altitudes below the 2.5-km altitude radar > cluster, the winds were below 30 knots and blowing more to the southeast > or ESE. This is supported by the small southeastward shift from the central, > linear-looking return, and the wider cluster to its lower right that was > scanned less than a minute later. The first place I would search would be > the southeast edge of the 2.5-km altitude cluster. > > Unfortunately, this is a tough search area. --Rob > > > From: Meteorite-list [meteorite-list-boun...@meteoritecentral.com] on behalf > of Korotev, Randy via Meteorite-list [meteorite-list@meteoritecentral.com] > Sent: Sunday, November 18, 2018 8:26 AM > To: meteorite-list@meteoritecentral.com > Subject: EXTERNAL: [meteorite-list] possible Alabama lunar meteorite fall > > If there has been discussion of this on the List, I missed it > > https://ares.jsc.nasa.gov/meteorite-falls/ > > ~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+ > Randy L. Korotev > Research Professor, retired > Department of Earth & Planetary Sciences > Washington University in Saint Louis > __ > > Visit our Facebook page https://www.facebook.com/meteoritecentral and the > Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > https://pairlist3.pair.net/mailman/listinfo/meteorite-list > > __ > > Visit our Facebook page https://www.facebook.com/meteoritecentral and the > Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] possible Alabama lunar meteorite fall
Thank you Bill Thank you Rob. Let's see what happens next. Anne Black IMPACTIKA.com impact...@aol.com -Original Message- From: Matson, Rob D. via Meteorite-list To: Bill Cooke ; Anne Black Cc: meteorite-list@meteoritecentral.com Sent: Sun, Nov 18, 2018 5:12 pm Subject: Re: [meteorite-list] possible Alabama lunar meteorite fall Hi Anne -- Bill beat me to it. Basically you have a small asteroid in an orbit that is dynamically difficult (but not impossible) to achieve without having originated in the earth-Moon system. The aphelion was well inside the orbit of Mars, so the only way it could get from the Main Belt to the orbit that it occupied immediately prior to hitting the earth is via past earth/Moon encounters. The easier path is via lunar ejecta following a NEO impact. --Rob From: Bill Cooke [cook...@comcast.net] Sent: Sunday, November 18, 2018 2:18 PM To: Anne Black Cc: Matson, Rob D. [US-US]; meteorite-list@meteoritecentral.com Subject: EXTERNAL: Re: [meteorite-list] possible Alabama lunar meteorite fall I can answer this, as we got enough data from our meteor cameras to compute an orbit. It was very similar to that of Earth (semi major axis of 1 AU, eccentricity < 0.1) with an inclination within 2 standard deviations of that of the Moon. This means we are either dealing with an evolved orbit (most likely) or lunar ejecta (much less likely, but not impossible). Bill Cooke NASA Meteoroid Environment Office (Sent from my iPad) > On Nov 18, 2018, at 4:01 PM, Anne Black via Meteorite-list > wrote: > > Randy, Rob, > > What makes you think that it could be a Lunar? > Yes, I read the article, and it is just mentioned as a "possibility". > > Your opinions? > > Anne Black > IMPACTIKA.com > impact...@aol.com > > > > -Original Message- > From: Matson, Rob D. via Meteorite-list > To: meteorite-list@meteoritecentral.com > Sent: Sun, Nov 18, 2018 12:31 pm > Subject: Re: [meteorite-list] possible Alabama lunar meteorite fall > > > Hi Randy, > > It hadn't been mentioned yet on the Met-List. I worked this fall last week > (unaware > that Marc Fries had already done so), so the fortunate result of the > independent > analysis is that two people came up with the same answer and the exact same > radar returns. (I also analyzed the Carrollton, AL, seismic station data > which has > an unmistakable sonic boom just 106 seconds after the terminal burst of the > bolide.) I'm 100% sure these returns are associated with the fall since they > are > practically colocated with the seismometer. > > Upper atmospheric winds were high at the time of the fall -- jet stream was > about 125 knots blowing almost due east. This is why the Doppler radar > returns subsequent to the initial high-altitude westerb return at 15 km are > displaced to the east of it. At the altitudes below the 2.5-km altitude radar > cluster, the winds were below 30 knots and blowing more to the southeast > or ESE. This is supported by the small southeastward shift from the central, > linear-looking return, and the wider cluster to its lower right that was > scanned less than a minute later. The first place I would search would be > the southeast edge of the 2.5-km altitude cluster. > > Unfortunately, this is a tough search area. --Rob > > > From: Meteorite-list [meteorite-list-boun...@meteoritecentral.com] on behalf > of Korotev, Randy via Meteorite-list [meteorite-list@meteoritecentral.com] > Sent: Sunday, November 18, 2018 8:26 AM > To: meteorite-list@meteoritecentral.com > Subject: EXTERNAL: [meteorite-list] possible Alabama lunar meteorite fall > > If there has been discussion of this on the List, I missed it > > https://ares.jsc.nasa.gov/meteorite-falls/ > > ~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+ > Randy L. Korotev > Research Professor, retired > Department of Earth & Planetary Sciences > Washington University in Saint Louis > __ > > Visit our Facebook page https://www.facebook.com/meteoritecentral and the > Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > https://pairlist3.pair.net/mailman/listinfo/meteorite-list > > __ > > Visit our Facebook page https://www.facebook.com/meteoritecentral and the > Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-lis
Re: [meteorite-list] possible Alabama lunar meteorite fall
Several of us are considering going unfortunately we won't be able to leave until after Thanksgiving. On Nov 18, 2018 12:31 PM, "Matson, Rob D. via Meteorite-list" < meteorite-list@meteoritecentral.com> wrote: Hi Randy, It hadn't been mentioned yet on the Met-List. I worked this fall last week (unaware that Marc Fries had already done so), so the fortunate result of the independent analysis is that two people came up with the same answer and the exact same radar returns. (I also analyzed the Carrollton, AL, seismic station data which has an unmistakable sonic boom just 106 seconds after the terminal burst of the bolide.) I'm 100% sure these returns are associated with the fall since they are practically colocated with the seismometer. Upper atmospheric winds were high at the time of the fall -- jet stream was about 125 knots blowing almost due east. This is why the Doppler radar returns subsequent to the initial high-altitude westerb return at 15 km are displaced to the east of it. At the altitudes below the 2.5-km altitude radar cluster, the winds were below 30 knots and blowing more to the southeast or ESE. This is supported by the small southeastward shift from the central, linear-looking return, and the wider cluster to its lower right that was scanned less than a minute later. The first place I would search would be the southeast edge of the 2.5-km altitude cluster. Unfortunately, this is a tough search area. --Rob From: Meteorite-list [meteorite-list-boun...@meteoritecentral.com] on behalf of Korotev, Randy via Meteorite-list [meteorite-list@ meteoritecentral.com] Sent: Sunday, November 18, 2018 8:26 AM To: meteorite-list@meteoritecentral.com Subject: EXTERNAL: [meteorite-list] possible Alabama lunar meteorite fall If there has been discussion of this on the List, I missed it https://ares.jsc.nasa.gov/meteorite-falls/ ~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+~+ Randy L. Korotev Research Professor, retired Department of Earth & Planetary Sciences Washington University in Saint Louis __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
