Re: [meteorite-list] Sun Eats Another Comet
It's always happened. It must have happened much more at times in the past when the comet influx was greater. As you note, we're just catching more now because we have instruments continually monitoring the Sun. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: Meteorites USA e...@meteoritesusa.com To: Meteorite-list meteorite-list@meteoritecentral.com Sent: Saturday, April 10, 2010 12:12 PM Subject: [meteorite-list] Sun Eats Another Comet Sun Eats Another Comet http://spaceweather.com/images2010/09apr10/comet_c2_big2.gif Question: Is this something new? Or has this been happening since the beginning of our solar system and we're just now tuning in to the show? Regards, Eric __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sun Eats Another Comet
So basically, like the asteroid collision in the asteroid belt a while back. That's the first time it was ever viewed, but we've known it happens, hence one source of the meteorites we love so much. ;) Oh yeah one more closing thought... That comet that just smashed the Sun. Why didn't we see it before it was gobbled up by the Sun? And this raises another question. How big was it? Regards, Eric On 4/10/2010 11:17 AM, Chris Peterson wrote: It's always happened. It must have happened much more at times in the past when the comet influx was greater. As you note, we're just catching more now because we have instruments continually monitoring the Sun. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: Meteorites USA e...@meteoritesusa.com To: Meteorite-list meteorite-list@meteoritecentral.com Sent: Saturday, April 10, 2010 12:12 PM Subject: [meteorite-list] Sun Eats Another Comet Sun Eats Another Comet http://spaceweather.com/images2010/09apr10/comet_c2_big2.gif Question: Is this something new? Or has this been happening since the beginning of our solar system and we're just now tuning in to the show? Regards, Eric __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sun Eats Another Comet
Resending from home e-mail: Hi Eric, Sun Eats Another Comet http://spaceweather.com/images2010/09apr10/comet_c2_big2.gif Question: Is this something new? Or has this been happening since the beginning of our solar system and we're just now tuning in to the show? Perhaps the most accurate answer to your question is neither. ;-) Kreutz comets are not new (e.g. in the sense of having just burst on the scene in the last few years). But they haven't been around for millennia either. The Kreutz family of sungrazers have been putting on their show for almost a thousand years, and include the Great Comets of 1843 and 1882, as well as Comet Ikeya-Seki in 1965. They all trace their lineage to a single progenitor comet, which may have been the Great Comet of 1106. You can read more about the family here: http://en.wikipedia.org/wiki/Kreutz_Sungrazers I discovered my first Kreutz comet in 1992 -- SOHO comet #445. My most recent Kreutz comet was SOHO #1798 (my 84th Kreutz), which I found in January of this year. So as you can see, SOHO has discovered over 1300 comets in the last 8 years, most of them members of the Kreutz family). Cheers, Rob P.S. Most Kreutz comets do not actually hit the sun. Their perihelion distances are typically around 0.005 a.u. (748,000 km), which is about 7% more than the sun's radius. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sun Eats Another Comet
While Kreutz sungrazers constitute a recent population in geological terms, it seems highly likely that there have always been sungrazer subpopulations. You might go a few thousand years with low activity, and a few thousand with higher activity. And within those periods there will be statistical fluctuations as well as actual density fluctuations. And of course, there will always be sungrazers that aren't part of any subpopulation- sporadics, if you will. (I don't think it has been confirmed that this was a Kreutz comet, although it seems most likely.) Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: Rob Matson mojave_meteori...@cox.net To: Meteorite-list meteorite-list@meteoritecentral.com Sent: Saturday, April 10, 2010 1:01 PM Subject: Re: [meteorite-list] Sun Eats Another Comet Resending from home e-mail: Hi Eric, Sun Eats Another Comet http://spaceweather.com/images2010/09apr10/comet_c2_big2.gif Question: Is this something new? Or has this been happening since the beginning of our solar system and we're just now tuning in to the show? Perhaps the most accurate answer to your question is neither. ;-) Kreutz comets are not new (e.g. in the sense of having just burst on the scene in the last few years). But they haven't been around for millennia either. The Kreutz family of sungrazers have been putting on their show for almost a thousand years, and include the Great Comets of 1843 and 1882, as well as Comet Ikeya-Seki in 1965. They all trace their lineage to a single progenitor comet, which may have been the Great Comet of 1106. You can read more about the family here: http://en.wikipedia.org/wiki/Kreutz_Sungrazers I discovered my first Kreutz comet in 1992 -- SOHO comet #445. My most recent Kreutz comet was SOHO #1798 (my 84th Kreutz), which I found in January of this year. So as you can see, SOHO has discovered over 1300 comets in the last 8 years, most of them members of the Kreutz family). Cheers, Rob P.S. Most Kreutz comets do not actually hit the sun. Their perihelion distances are typically around 0.005 a.u. (748,000 km), which is about 7% more than the sun's radius. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sun Eats Another Comet
Hello list, If you have an iphone you can get the 3D SUN app and it will alert you to everything being discussed. I had this video and information last night when the app let me know it was available. Too bad there isn't any meteorite apps available yet. Warren Sansoucie From: mojave_meteori...@cox.net To: meteorite-list@meteoritecentral.com Date: Sat, 10 Apr 2010 12:01:55 -0700 Subject: Re: [meteorite-list] Sun Eats Another Comet Resending from home e-mail: Hi Eric, Sun Eats Another Comet http://spaceweather.com/images2010/09apr10/comet_c2_big2.gif Question: Is this something new? Or has this been happening since the beginning of our solar system and we're just now tuning in to the show? Perhaps the most accurate answer to your question is neither. ;-) Kreutz comets are not new (e.g. in the sense of having just burst on the scene in the last few years). But they haven't been around for millennia either. The Kreutz family of sungrazers have been putting on their show for almost a thousand years, and include the Great Comets of 1843 and 1882, as well as Comet Ikeya-Seki in 1965. They all trace their lineage to a single progenitor comet, which may have been the Great Comet of 1106. You can read more about the family here: http://en.wikipedia.org/wiki/Kreutz_Sungrazers I discovered my first Kreutz comet in 1992 -- SOHO comet #445. My most recent Kreutz comet was SOHO #1798 (my 84th Kreutz), which I found in January of this year. So as you can see, SOHO has discovered over 1300 comets in the last 8 years, most of them members of the Kreutz family). Cheers, Rob P.S. Most Kreutz comets do not actually hit the sun. Their perihelion distances are typically around 0.005 a.u. (748,000 km), which is about 7% more than the sun's radius. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sun Eats Another Comet
Hi Rob, Thanks... ;) Point taken... Your point about the sungrazers is a perfect example of what I'm referring to. I was being more general in my question about comets. Specifically the Kreutz comets couldn't be the first (maybe first observed), nor the last to be obliterated by the Sun. The term smashed into was not accurate, but artistic license. (I can say that since I'm not a scientist) ;) Certain freedoms... 1000 years is a long time to humans, but cosmologically speaking it's not even a blink of an eye. Could we deduce that given the number of comets (or sungrazers) that have been discovered and observed in the past, could we apply this number going backwards in time and figure the number of comets that have been swallowed up by the Sun, or is there just not enough data? Congrats on your Kreutz comet discoveries!!! Awesome! Oh yeah, how big are these comets, and how come we didn't see them before they were gobbled up? Regards, Eric -- On 4/10/2010 12:01 PM, Rob Matson wrote: Resending from home e-mail: Hi Eric, Sun Eats Another Comet http://spaceweather.com/images2010/09apr10/comet_c2_big2.gif Question: Is this something new? Or has this been happening since the beginning of our solar system and we're just now tuning in to the show? Perhaps the most accurate answer to your question is neither. ;-) Kreutz comets are not new (e.g. in the sense of having just burst on the scene in the last few years). But they haven't been around for millennia either. The Kreutz family of sungrazers have been putting on their show for almost a thousand years, and include the Great Comets of 1843 and 1882, as well as Comet Ikeya-Seki in 1965. They all trace their lineage to a single progenitor comet, which may have been the Great Comet of 1106. You can read more about the family here: http://en.wikipedia.org/wiki/Kreutz_Sungrazers I discovered my first Kreutz comet in 1992 -- SOHO comet #445. My most recent Kreutz comet was SOHO #1798 (my 84th Kreutz), which I found in January of this year. So as you can see, SOHO has discovered over 1300 comets in the last 8 years, most of them members of the Kreutz family). Cheers, Rob P.S. Most Kreutz comets do not actually hit the sun. Their perihelion distances are typically around 0.005 a.u. (748,000 km), which is about 7% more than the sun's radius. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sun Eats Another Comet
Hi All, Chris wrote: While Kreutz sungrazers constitute a recent population in geological terms, it seems highly likely that there have always been sungrazer subpopulations. I agree completely. The best reasoning is that it hardly seems likely that a burst of sungrazers would occur at precisely the time (in geologic terms) that we have developed the technology to detect them. The more realistic conclusion to draw is that episodes of such activity are the rule rather than the exception. Consider, also, that the Kreutz family isn't the only sungrazing comet family currently making appearances. There are also the Kracht, Meyer and Marsden groups. Chris added: And of course, there will always be sungrazers that aren't part of any subpopulation- sporadics, if you will. Quite so -- SOHO has observed dozens of non-group sungrazers over the last 13 years. (I don't think it has been confirmed that this was a Kreutz comet, although it seems most likely.) In this case, it was definitely a Kreutz. Correct location and direction of motion in the SOHO LASCO fields of view, as well as the correct velocity. Best, Rob __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sun Eats Another Comet
In this case, it was definitely a Kreutz. Correct location and direction of motion in the SOHO LASCO fields of view, as well as the correct velocity. Thanks. I haven't read much additional news besides what was on Spaceweather.com (but I haven't looked too hard, either g.) Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: Rob Matson mojave_meteori...@cox.net To: Meteorite-list meteorite-list@meteoritecentral.com Sent: Saturday, April 10, 2010 2:00 PM Subject: Re: [meteorite-list] Sun Eats Another Comet Hi All, Chris wrote: While Kreutz sungrazers constitute a recent population in geological terms, it seems highly likely that there have always been sungrazer subpopulations. I agree completely. The best reasoning is that it hardly seems likely that a burst of sungrazers would occur at precisely the time (in geologic terms) that we have developed the technology to detect them. The more realistic conclusion to draw is that episodes of such activity are the rule rather than the exception. Consider, also, that the Kreutz family isn't the only sungrazing comet family currently making appearances. There are also the Kracht, Meyer and Marsden groups. Chris added: And of course, there will always be sungrazers that aren't part of any subpopulation- sporadics, if you will. Quite so -- SOHO has observed dozens of non-group sungrazers over the last 13 years. (I don't think it has been confirmed that this was a Kreutz comet, although it seems most likely.) In this case, it was definitely a Kreutz. Correct location and direction of motion in the SOHO LASCO fields of view, as well as the correct velocity. Best, Rob __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
